TownyfixHouse extensions designed and built around how you live
More kitchen space, a bigger living area, or a second storey of bedrooms — we plan and build extensions that add real space and value across the South East.
Extension work we carry out
Single-storey rear extensions
The most popular way to create a bigger kitchen-diner or family living space.
Learn more →Double-storey extensions
Add space both downstairs and upstairs — ideal for growing families needing extra bedrooms.
Learn more →Side-return extensions
Reclaim wasted side-alley space to widen kitchens and living rooms in terraced homes.
Learn more →Wrap-around extensions
Combine side-return and rear extensions for maximum ground-floor space.
Learn more →Garage conversions
Turn an underused garage into livable, insulated space without extending your footprint.
Learn more →Common questions about house extensions
Do I need planning permission for an extension?
Many single-storey rear extensions fall under Permitted Development and don't need full planning permission, though limits apply. We assess this during your free site visit and handle the application if one is needed.
What is a party wall agreement, and do I need one?
If your extension is near or on a boundary with a neighbouring property, a Party Wall Agreement is usually required by law. We advise on this and can coordinate the process for you.
How long does a typical extension take to build?
A single-storey rear extension usually takes eight to twelve weeks from groundworks to completion; double-storey and wrap-around extensions take longer. You'll receive a project-specific schedule in your quote.
Can you help with the extension design, not just the build?
Yes — we work with you on layout and design from the outset, so the extension suits how you actually use the space rather than just adding square footage.