House extensions & loft conversions in Kingston
From riverside period houses to suburban semis, we design and build across the Royal Borough — including a completed hip-to-gable loft with rear extension in Surbiton that added two bedrooms. Fixed itemised pricing, one team throughout the KT postcodes.
- Postcode KT1
- Borough Kingston upon Thames
- Projects 2
- Free quote 2 min online
What we deliver in Kingston
Every street sits differently — a period terrace, a post-war semi, a modern infill. We shape the recommendation around your actual house, its planning context and how you want to live.
Side or rear additions transform narrow kitchens into open-plan family spaces. Two-storey extensions provide extra bedrooms without moving.
Dormer, mansard, hip-to-gable and L-shaped conversions create comfortable bedrooms with en-suites. The right format depends on the roof pitch and conservation rules.
If you have a vacant plot or an outdated house, Kingston allows ground-up family homes or small blocks of flats. We manage the entire process — from design to handover.
SERVICE 01 House extensions in Kingston
Single-storey, double-storey, side-return and wrap-around extensions — designed, planned and built by one in-house team.
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SERVICE 02 Loft conversions in Kingston
Dormer, mansard, hip-to-gable and L-shape lofts — full-height ceilings, proper staircases, en-suites.
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SERVICE 03 New builds in Kingston
Ground-up homes on infill plots, demolition-and-rebuild, and small multi-unit schemes.
View serviceRecent work in Kingston
Recent Kingston projects include a glass-roofed kitchen extension on a Victorian terrace, a mansard conversion creating a parents’ suite, and a two-storey family home built on a riverside plot.
Common Kingston questions
Things you might need to know about building in Kingston.
Do I need planning permission for an extension in Kingston?
Many extensions in Kingston fall under permitted development. Where a full application is needed, it goes to Kingston upon Thames Council — we assess your property type, the council's restrictions and any conservation status on the first visit, and handle the application ourselves.
How long does a project in Kingston typically take?
From first consultation to handover: 6–9 months for a single-storey extension or loft, 9–14 months for double-storey or wrap-around. We give you a tighter estimate after the survey.
Are there conservation areas in Kingston?
Several streets in Kingston upon Thames Council's area fall within conservation areas that restrict materials and detailing. We check your exact address against the register on the first visit, and we have approved schemes in conservation areas nearby.
What is a typical extension cost in Kingston?
Build cost in this part of London runs £2,500–£4,000 per square metre for a finished extension including kitchen and finishes. Our calculator gives a personalised estimate.
Ready to start your Kingston project?
Get an instant estimate in 2 minutes — no callbacks, no commitment. Or talk to a real person on 0800 0432 333.