Across Kent & East Sussex
House Extensions & Additions in Kent
Single-storey, two-storey and wrap-around extensions — designed, approved and built by one accountable team.
House Extensions & Additions in Kent — what's included
40+ years of house extensions across Kent
House extensions are the bulk of our larger Kent projects — single-storey rear extensions, two-storey side returns, wrap-arounds and orangery-style glazed additions. We run design-and-build end-to-end: architectural drawings, planning application, structural calcs, building regs and the full build under one written contract.
Most Kent rear extensions sit within permitted development at up to 4m deep for a detached home and 3m for a semi/terrace. Larger schemes go through the neighbour-consultation route or full planning — both routes we submit and follow up on your behalf.
Typical Kent extension build is 14–18 weeks for a 25–35m² rear single-storey, including weather-tight shell at week 6–7 and break-through to the existing kitchen at week 10–11.
- Architectural drawings
- Planning & building control
- Steel beam installation
- Glazing & roofing
Kent coverage
Towns & villages we cover for house extensions
From our Biddenden yard we reach most of the Weald in 20 minutes and the whole of Kent and East Sussex without long-distance call-out fees. Click your nearest town for local detail, postcodes and planning notes.
FAQs
House Extensions in Kent — frequently asked
How long does a single-storey extension take to build?
From breaking ground to handover is typically 14–18 weeks for a 25–35m² rear extension, including weather-tight shell at week 6–7 and fit-out from week 10.
Will I need to move out during the extension build?
On most rear extensions you can stay in the house. Phasing the kitchen break-through is where it gets disruptive — we usually move that to week 8–10 once the new envelope is dry.
Can you take on the architect role and the build?
Yes — we run a design-and-build service end-to-end, which avoids the gap where most projects lose money: drawings that aren't buildable, or builders quoting against incomplete specs.
Do I need building regulations approval as well as planning?
Almost always. Planning approves the principle; building regs approve the construction detail. We submit the building regs application in parallel with planning to save 6–8 weeks.
What's the largest extension you can build under permitted development?
Up to 4m deep for a detached house and 3m for a semi/terrace (8m and 6m under the larger neighbour-consultation route until 2025). We confirm yours at survey.
Can you match existing brick, tile or render?
We source matching brick from Imperial Bricks, Kingscourt and reclamation yards; clay peg tiles from Aldershaw or Tudor; and tint render to match weathered originals.
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