Extensions
Extension Approvals in 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.
8 records
Recent extensions approvals
The following records have been published by Hertsmere Borough Council for properties in Hertsmere.
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.
Example drawings
Drawing examples — extensions in Hertsmere
Anonymised plan sheets illustrating the type of drawings Crown Architecture prepares for extensions projects in Hertsmere. Always check the public register for exact approved drawings.
Official guidance
Extensions — official planning guidance
Learn more about extensions requirements from the Planning Portal and Hertsmere Borough Council.
FAQ
Extensions in Hertsmere — common questions
What extension approvals have recently been approved in Hertsmere?
This page shows recent extension approvals published by Hertsmere Borough Council. Each record includes the application reference, decision date, proposal summary, and planning considerations.
Can I replicate an approved extension approval in Hertsmere?
Previous approvals show what the council has found acceptable, but every application is assessed individually. Crown Architecture can review your property and advise whether a similar approach would work for your specific situation.
How long does it take to get extension approval approval in Hertsmere?
Most householder applications are determined within 8 weeks. Prior approval applications have a 42-day determination period. Lawful development certificate applications are typically determined within 8 weeks. More complex applications may take longer.
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.
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