Areas / Spelthorne
Architects in Spelthorne
Spelthorne's semis and bungalows in Ashford, Sunbury and Shepperton are well suited to extensions and loft conversions, but flood risk near the Thames and the Green Belt need checking early.
RIBA Chartered Practice · ARB-registered architects · Extensions, lofts and planning drawings
- FreeInitial consultationA conversation about your project, and a first view of what's possible, before any fee is agreed.
- FixedFee for each stageEvery stage is priced in writing before it starts. No hourly billing.
- 3DSee the design firstYour design is shown in 3D before it's submitted, while changes are still easy.
- FreeResubmissionIf planning is refused, we revise and resubmit at no extra design fee. Conditions
In Spelthorne we draw rear extensions, loft conversions and bungalow conversions. A large part of the borough lies in the Thames floodplain, so we check the Environment Agency flood map at the outset and arrange a flood risk assessment where the council needs one.
The new Local Plan and Design Code, adopted in March 2026, now guide decisions across the borough.
Local planning points
Planning in Spelthorne
Checked November 2026. Planning policy changes, so we confirm the position for your address before you commit.
The Spelthorne Local Plan 2024–2039/40 was adopted on 17 March 2026, together with the Spelthorne Design Code and an HMO supplementary planning document.
SourceAbout 65% of the borough is Green Belt, and 30% is either floodplain or reservoir, so a flood risk assessment is often needed for extensions near the Thames.
SourceArticle 4 directions now cover the whole borough, so every new HMO, whatever its size, needs planning permission from 13 March 2026.
Source
Services
What we draw in Spelthorne
- House extensions
- Loft conversions
- Basement conversions
- Planning permission
- Building regulations drawings
- Structural calculations
- Flat conversions
- Change of use
- New builds
- Interior design
Neighbourhoods we cover include Staines-upon-Thames, Ashford, Sunbury-on-Thames, Shepperton and Stanwell.