We design, plan and build house extensions across Kingston and the wider Kingston upon Thames borough — one team, one fixed price, one project manager from sketch to handover.
Typical scope +18 to +60m²
Cost guide From £2,500 / m²
Build time 12–22 weeks
Consult Free 1–2 hour visit
Local advantage
Why Kingston homeowners choose DPS for house extensions.
01 · LOCAL KNOWLEDGE
We know the Kingston upon Thames planning quirks.
Conservation areas, Article 4 directions, party-wall hotspots — every Kingston upon Thames street has its own permission map.
We have submitted dozens of approved schemes across Kingston and the surrounding postcodes.
02 · ONE TEAM
Architects, builders, project managers — all in-house.
No subcontractor juggling. From the first sketch through structural engineering to final snagging, your project moves
through people who all sit in the same office and answer to the same project manager.
03 · TRANSPARENT PRICING
From £2,500 / m² — itemised and fixed.
You pay in stages, only after each stage is signed off. Variations only happen when scope genuinely changes — and
they go through written authorisation, never a verbal "while we are at it".
House extensions in Kingston — frequent questions.
Do you do house extensions in Kingston?
Yes — Kingston (KT1) is well within our Kingston upon Thames working area. We typically deliver several house extensions projects across this borough each year.
How long does a house extensions project take in Kingston?
End-to-end (consultation → handover) usually 12–22 weeks. Build phase alone is shorter — most house extensions sites complete in 8–18 weeks depending on scope and finishes.
What does house extensions cost in Kingston?
Typical range: From £2,500 / m². Our online calculator gives you a tighter figure based on your house type and ambitions; the fixed quote follows a free site visit.
Will I need planning permission in Kingston?
It depends on the property. Many house extensions fall under permitted development, especially in Kingston upon Thames. Where planning is needed (conservation areas, listed properties, larger schemes), we handle the application end-to-end.
Do I need planning permission for a house extension?
Many extensions fall under permitted development. We assess your property and tell you exactly what you need on the first visit.
How long does a typical extension take?
A single-storey extension takes 12–16 weeks from breaking ground to completion. Double-storey runs 16–22 weeks.
Can we live in the house during the build?
For most rear extensions, yes. We dust-seal the working area and maintain access to your kitchen and bathroom.