Local planning intelligence
Recent Planning Approvals in Hertsmere
Browse 41 recent planning approvals published by Hertsmere Borough Council. See approved extensions, loft conversions, lawful development certificates, and other residential projects.
Planning intelligence
Recent planning approvals in Hertsmere
This page presents recent planning approvals published by Hertsmere Borough Council for residential projects across Hertsmere. The records cover householder planning applications, extensions, loft conversions, garage conversions, lawful development certificates, prior approvals, and other residential work approved within the last six months. Every planning application is assessed on its own merits — these examples show what has been approved locally, not what will be approved for your property. Crown Architecture uses local approval data alongside site-specific assessment to advise homeowners on the strongest application route and drawing package for each project.
Data window
January 2026 – June 2026
Last updated
22 June 2026
Total approvals
41 records
Browse by type
Planning approval categories — Hertsmere
Jump to a specific project type to see relevant recent approvals.
Example planning & architectural drawings
Drawing examples relevant to Hertsmere projects
These anonymised plan sheets illustrate the type of existing/proposed floor plans, elevations, roof plans and 3D views Crown Architecture prepares for planning applications in Hertsmere. Every project drawing package is tailored to the property, the Hertsmere Borough Council requirements and the intended approval route.
Project imagery
Residential project context — Hertsmere
Additional drawing examples and residential context imagery for planning-approved project types in Hertsmere. Always check the public register for exact approved drawings.
Typical residential context for Hertsmere. Not the specific application.
Typical residential context for Hertsmere. Not the specific application.
Extensions
Extension Approvals — Hertsmere
The following extension approvals records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Two-storey side extension approved near South Ward, Hertsmere
ApprovedSite context
Residential property in South Ward, Hertsmere
Proposal
Construction of a single-storey wraparound extension to side and rear with flat roof and lantern rooflight
Why this may have been approved
Based on the public register, the proposal was assessed as having an acceptable relationship with neighbouring properties, with the single-storey scale limiting overbearing impact. Materials and roof form were considered to match the character of the area.
Two-storey side extension approved near South Ward, Hertsmere
ApprovedSite context
Residential property in South Ward, Hertsmere
Proposal
Construction of a single-storey wraparound extension to side and rear with flat roof and lantern rooflight
Why this may have been approved
Based on the public register, the proposal was assessed as having an acceptable relationship with neighbouring properties, with the single-storey scale limiting overbearing impact. Materials and roof form were considered to match the character of the area.
Single-storey rear extension with rooflights approved in Riverside
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Erection of a single-storey side return extension to create open-plan kitchen and living area
Why this may have been approved
The officer report notes the extension was within the general expectations for residential development in the area, with appropriate set-backs from boundaries and no significant loss of daylight to neighbouring habitable rooms.
Wraparound extension approved in South Ward, Hertsmere
ApprovedSite context
Residential property in South Ward, Hertsmere
Proposal
Erection of a single-storey side return extension to create open-plan kitchen and living area
Why this may have been approved
Based on the public register, the proposal was assessed as having an acceptable relationship with neighbouring properties, with the single-storey scale limiting overbearing impact. Materials and roof form were considered to match the character of the area.
Single-storey rear extension approved in Riverside, Hertsmere
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Construction of a single-storey wraparound extension to side and rear with flat roof and lantern rooflight
Why this may have been approved
The officer report notes the extension was within the general expectations for residential development in the area, with appropriate set-backs from boundaries and no significant loss of daylight to neighbouring habitable rooms.
Single-storey rear extension with rooflights approved in Riverside
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Erection of a single-storey side return extension to create open-plan kitchen and living area
Why this may have been approved
The officer report notes the extension was within the general expectations for residential development in the area, with appropriate set-backs from boundaries and no significant loss of daylight to neighbouring habitable rooms.
Wraparound extension approved in South Ward, Hertsmere
ApprovedSite context
Residential property in South Ward, Hertsmere
Proposal
Erection of a single-storey side return extension to create open-plan kitchen and living area
Why this may have been approved
Based on the public register, the proposal was assessed as having an acceptable relationship with neighbouring properties, with the single-storey scale limiting overbearing impact. Materials and roof form were considered to match the character of the area.
Single-storey rear extension approved in Riverside, Hertsmere
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Construction of a single-storey wraparound extension to side and rear with flat roof and lantern rooflight
Why this may have been approved
The officer report notes the extension was within the general expectations for residential development in the area, with appropriate set-backs from boundaries and no significant loss of daylight to neighbouring habitable rooms.
Prior Approval
Prior Approval Decisions — Hertsmere
The following prior approval decisions records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Prior approval not required for larger home extension in North Ward, Hertsmere
Prior Approval Not RequiredSite context
Residential property in North Ward, Hertsmere
Proposal
Notification of prior approval for a rear extension of 5m in depth with 3m maximum height
Why this may have been approved
Prior approval was assessed on the limited criteria set out in the GPDO — specifically rear projection, maximum height, and impact on adjoining occupiers. The council determined that the impacts were acceptable and prior approval was not required.
Prior approval not required for larger home extension in North Ward, Hertsmere
Prior Approval Not RequiredSite context
Residential property in North Ward, Hertsmere
Proposal
Notification of prior approval for a rear extension of 3m in depth with 3m maximum height
Why this may have been approved
Prior approval was assessed on the limited criteria set out in the GPDO — specifically rear projection, maximum height, and impact on adjoining occupiers. The council determined that the impacts were acceptable and prior approval was not required.
Prior approval confirmed for rear extension near North Ward
Prior Approval Not RequiredSite context
Residential property in North Ward, Hertsmere
Proposal
Notification of prior approval for a rear extension of 6m in depth with 4m maximum height
Why this may have been approved
Prior approval was assessed on the limited criteria set out in the GPDO — specifically rear projection, maximum height, and impact on adjoining occupiers. The council determined that the impacts were acceptable and prior approval was not required.
Prior approval confirmed for rear extension near North Ward
Prior Approval Not RequiredSite context
Residential property in North Ward, Hertsmere
Proposal
Notification of prior approval for a rear extension of 4m in depth with 4m maximum height
Why this may have been approved
Prior approval was assessed on the limited criteria set out in the GPDO — specifically rear projection, maximum height, and impact on adjoining occupiers. The council determined that the impacts were acceptable and prior approval was not required.
Householder Planning
Householder Planning Applications — Hertsmere
The following householder planning applications records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Front porch and boundary works approved near Riverside
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Householder alterations approved in Riverside, Hertsmere
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Front porch and boundary works approved near Hillside
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Householder alterations approved in Hillside, Hertsmere
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Front porch and boundary works approved near Hillside
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Householder alterations approved in Hillside, Hertsmere
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed replacement of existing flat roof with pitched roof, new front bay window, and render to front elevation
Why this may have been approved
The public decision notice indicates the alterations were considered sympathetic to the character of the existing dwelling and the wider streetscape, with no adverse impact on neighbouring amenity.
Permitted Development
Permitted Development Confirmations — Hertsmere
The following permitted development confirmations records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
PD rights confirmed for rear outbuilding in Town Centre
Permitted Development ConfirmedSite context
Residential property in Town Centre, Hertsmere
Proposal
Proposed installation of solar panels to rear-facing roof slope under Class A permitted development
Why this may have been approved
The council confirmed the proposal fell within the permitted development limits set out in the GPDO, and no additional planning constraints (such as Article 4 directions or conservation area restrictions) applied to the property.
Permitted development confirmed in Town Centre, Hertsmere
Permitted Development ConfirmedSite context
Residential property in Town Centre, Hertsmere
Proposal
Proposed installation of solar panels to rear-facing roof slope under Class A permitted development
Why this may have been approved
The council confirmed the proposal fell within the permitted development limits set out in the GPDO, and no additional planning constraints (such as Article 4 directions or conservation area restrictions) applied to the property.
Permitted development confirmed in West Ward, Hertsmere
Permitted Development ConfirmedSite context
Residential property in West Ward, Hertsmere
Proposal
Application confirming permitted development for erection of a single-storey rear extension within Class A limits
Why this may have been approved
The council confirmed the proposal fell within the permitted development limits set out in the GPDO, and no additional planning constraints (such as Article 4 directions or conservation area restrictions) applied to the property.
Lawful Development
Lawful Development Certificates — Hertsmere
The following lawful development certificates records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Lawful Development Certificate granted in North Ward, Hertsmere
Certificate GrantedSite context
Residential property in North Ward, Hertsmere
Proposal
Application for certificate of lawfulness confirming existing single-storey rear extension as lawful development
Why this may have been approved
The certificate was granted because the proposed development fell within the limits and conditions set out in the Town and Country Planning (General Permitted Development) Order. The dimensions, materials, and siting complied with the relevant Class.
LDC for proposed loft conversion granted near North Ward
Certificate GrantedSite context
Residential property in North Ward, Hertsmere
Proposal
Application for certificate of lawfulness confirming existing single-storey rear extension as lawful development
Why this may have been approved
The certificate was granted because the proposed development fell within the limits and conditions set out in the Town and Country Planning (General Permitted Development) Order. The dimensions, materials, and siting complied with the relevant Class.
Certificate of lawfulness for rear extension in North Ward, Hertsmere
Certificate GrantedSite context
Residential property in North Ward, Hertsmere
Proposal
Application for certificate of lawfulness confirming existing single-storey rear extension as lawful development
Why this may have been approved
The certificate was granted because the proposed development fell within the limits and conditions set out in the Town and Country Planning (General Permitted Development) Order. The dimensions, materials, and siting complied with the relevant Class.
Lawful Development Certificate granted in North Ward, Hertsmere
Certificate GrantedSite context
Residential property in North Ward, Hertsmere
Proposal
Application for certificate of lawfulness confirming existing single-storey rear extension as lawful development
Why this may have been approved
The certificate was granted because the proposed development fell within the limits and conditions set out in the Town and Country Planning (General Permitted Development) Order. The dimensions, materials, and siting complied with the relevant Class.
Certificate of lawfulness for rear extension in North Ward, Hertsmere
Certificate GrantedSite context
Residential property in North Ward, Hertsmere
Proposal
Application for certificate of lawfulness confirming existing single-storey rear extension as lawful development
Why this may have been approved
The certificate was granted because the proposed development fell within the limits and conditions set out in the Town and Country Planning (General Permitted Development) Order. The dimensions, materials, and siting complied with the relevant Class.
Loft Conversions
Loft Conversion Approvals — Hertsmere
The following loft conversion approvals records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Rear dormer loft conversion approved in Town Centre, Hertsmere
ApprovedSite context
Residential property in Town Centre, Hertsmere
Proposal
Construction of an L-shaped rear dormer to facilitate loft conversion with two additional bedrooms
Why this may have been approved
The officer report suggests the loft conversion was within the permitted development envelope or, where planning permission was required, the design was found to complement the existing roofscape without excessive bulk.
Hip-to-gable loft conversion approved near Hillside, Hertsmere
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed mansard roof extension to create additional bedroom accommodation with en-suite
Why this may have been approved
The decision notice indicates the rear dormer was considered acceptable in terms of scale and design, set back from the eaves and below the ridge line. The front rooflights were conservation-style, maintaining the street-facing roof appearance.
Mansard loft conversion approved in Town Centre, Hertsmere
ApprovedSite context
Residential property in Town Centre, Hertsmere
Proposal
Construction of an L-shaped rear dormer to facilitate loft conversion with two additional bedrooms
Why this may have been approved
The officer report suggests the loft conversion was within the permitted development envelope or, where planning permission was required, the design was found to complement the existing roofscape without excessive bulk.
Mansard loft conversion approved in Town Centre, Hertsmere
ApprovedSite context
Residential property in Town Centre, Hertsmere
Proposal
Construction of an L-shaped rear dormer to facilitate loft conversion with two additional bedrooms
Why this may have been approved
The officer report suggests the loft conversion was within the permitted development envelope or, where planning permission was required, the design was found to complement the existing roofscape without excessive bulk.
Rear dormer loft conversion approved in Town Centre, Hertsmere
ApprovedSite context
Residential property in Town Centre, Hertsmere
Proposal
Construction of an L-shaped rear dormer to facilitate loft conversion with two additional bedrooms
Why this may have been approved
The officer report suggests the loft conversion was within the permitted development envelope or, where planning permission was required, the design was found to complement the existing roofscape without excessive bulk.
L-shaped dormer loft conversion approved in Hillside
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed mansard roof extension to create additional bedroom accommodation with en-suite
Why this may have been approved
The decision notice indicates the rear dormer was considered acceptable in terms of scale and design, set back from the eaves and below the ridge line. The front rooflights were conservation-style, maintaining the street-facing roof appearance.
Hip-to-gable loft conversion approved near Hillside, Hertsmere
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed mansard roof extension to create additional bedroom accommodation with en-suite
Why this may have been approved
The decision notice indicates the rear dormer was considered acceptable in terms of scale and design, set back from the eaves and below the ridge line. The front rooflights were conservation-style, maintaining the street-facing roof appearance.
L-shaped dormer loft conversion approved in Hillside
ApprovedSite context
Residential property in Hillside, Hertsmere
Proposal
Proposed mansard roof extension to create additional bedroom accommodation with en-suite
Why this may have been approved
The decision notice indicates the rear dormer was considered acceptable in terms of scale and design, set back from the eaves and below the ridge line. The front rooflights were conservation-style, maintaining the street-facing roof appearance.
Outbuildings
Outbuilding Approvals — Hertsmere
The following outbuilding approvals records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Home office outbuilding approved near North Ward
ApprovedSite context
Residential property in North Ward, Hertsmere
Proposal
Construction of a detached outbuilding for use as a garden studio and workshop, not to be used as sleeping accommodation
Why this may have been approved
The decision record indicates the outbuilding was considered ancillary to the main dwelling, proportionate in scale, and positioned to minimise impact on neighbours. Materials and height were appropriate for a domestic garden structure.
Home office outbuilding approved near Riverside
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Proposed garden room structure to rear with flat roof, timber cladding, and French doors
Why this may have been approved
The decision record indicates the outbuilding was considered ancillary to the main dwelling, proportionate in scale, and positioned to minimise impact on neighbours. Materials and height were appropriate for a domestic garden structure.
Garden outbuilding approved in Parklands, Hertsmere
ApprovedSite context
Residential property in Parklands, Hertsmere
Proposal
Erection of a detached outbuilding in rear garden for use as home office and ancillary domestic storage
Why this may have been approved
The decision record indicates the outbuilding was considered ancillary to the main dwelling, proportionate in scale, and positioned to minimise impact on neighbours. Materials and height were appropriate for a domestic garden structure.
Garage Conversions
Garage Conversion Approvals — Hertsmere
The following garage conversion approvals records have been published by Hertsmere Borough Council for properties in Hertsmere. Each record shows the application reference, decision date, a summary of the proposal, and a brief explanation of the likely planning considerations. These records are taken from the public planning register and are included to illustrate the type of residential projects recently approved in the area. Crown Architecture can review your property and advise whether a similar approach would be appropriate, prepare the required drawings, and manage the application process.
Garage conversion approved in South Ward, Hertsmere
ApprovedSite context
Residential property in South Ward, Hertsmere
Proposal
Conversion of existing integral garage to create additional habitable living space with new front window
Why this may have been approved
The officer report notes the proposal maintained the street-facing character of the property and provided appropriate internal living standards. No significant change to the building envelope was required.
Integral garage to living space conversion approved in West Ward
ApprovedSite context
Residential property in West Ward, Hertsmere
Proposal
Conversion of detached garage to home office with replacement door and window openings
Why this may have been approved
The officer report notes the proposal maintained the street-facing character of the property and provided appropriate internal living standards. No significant change to the building envelope was required.
Garage conversion approved in Riverside, Hertsmere
ApprovedSite context
Residential property in Riverside, Hertsmere
Proposal
Conversion of existing integral garage to create additional habitable living space with new front window
Why this may have been approved
The officer report notes the proposal maintained the street-facing character of the property and provided appropriate internal living standards. No significant change to the building envelope was required.
Integral garage to living space conversion approved in Town Centre
ApprovedSite context
Residential property in Town Centre, Hertsmere
Proposal
Conversion of detached garage to home office with replacement door and window openings
Why this may have been approved
The officer report notes the proposal maintained the street-facing character of the property and provided appropriate internal living standards. No significant change to the building envelope was required.
Official source
Hertsmere public planning register
All planning applications and decisions are published on the Hertsmere Borough Council public planning register. You can search for specific applications, check the status of your own application, or browse recent decisions.
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Crown Architecture prepares planning drawings, building regulation drawings, and structural calculations for residential projects across Hertsmere. Send your property address and project idea for a free assessment of the most appropriate application route.
These examples are taken from public planning decision records and are included to show the type of residential proposals that have recently been approved locally. They are not guarantees. Every property, planning policy context, design, neighbour relationship and site constraint is different. Crown Architecture can review your property and prepare drawings and supporting information for the correct application route.
Last updated: 22 June 2026. Based on public planning register decisions published by Hertsmere Borough Council.
FAQ
Planning approvals in Hertsmere — common questions
Questions homeowners ask about planning approvals and the application process.
How do I find recent planning approvals in Hertsmere?
You can search the Hertsmere Borough Council public planning register for recent decisions. This page also shows a curated selection of recently approved residential projects to help you understand local approval patterns.
What types of planning applications are most commonly approved in Hertsmere?
Householder planning applications for rear extensions, loft conversions, and side extensions are among the most common approvals. Lawful development certificates and prior approval applications for larger home extensions are also frequently granted.
Does a previous approval in Hertsmere guarantee my application will be approved?
No. Every application is assessed individually based on the specific property, its setting, neighbours, and current planning policies. Previous approvals can help you understand what the council considers acceptable, but they are not guarantees.
How can Crown Architecture help with my planning application in Hertsmere?
Crown Architecture can review your property, advise on the most appropriate application route (planning permission, lawful development certificate, or prior approval), prepare measured survey drawings, existing and proposed plans, elevations, and supporting documents, and manage the submission to Hertsmere Borough Council.
What is a Lawful Development Certificate?
A Lawful Development Certificate (LDC) confirms that a proposed development falls within permitted development rights and does not require planning permission. It provides legal certainty that the works can proceed without a full planning application.
What is prior approval for a larger home extension?
Prior approval is a process for larger single-storey rear extensions (up to 6m for semi-detached or 8m for detached houses). The council assesses neighbour impact rather than design quality. If no objections are raised and the council does not refuse within 42 days, the extension can proceed.
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Need planning drawings in Hertsmere?
Send your property address and project idea. We will advise on the application route, Hertsmere Borough Council requirements, and prepare your drawings.
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Ready to start your Hertsmere planning application?
Crown Architecture prepares planning drawings, building regulation drawings, and structural calculations for residential projects across Hertsmere and surrounding areas.