Covering Welwyn Garden City
We work in Welwyn Garden City (AL8) and the places around it, including Hatfield, Hertford and St Albans.
Homes in the East of England
Housing in the East of England ranges from post-war estates and modern developments to timber-framed and period homes in historic towns, so permitted development checks and conservation controls both feature regularly.
What is included in a wraparound extension in Welwyn Garden City?
Because it removes two external walls, a wraparound needs careful structural design and a good plan for the corner where the steels meet. We design, apply for any permissions, build and finish the shell, and can fit the kitchen as part of the same contract.
- Pitched, flat or glazed roof with rooflights
- Glazing, insulation, plastering and electrics
- Optional kitchen supply and installation
How much does a wraparound extension cost in Welwyn Garden City?
Indicative costs for wraparound extensions. London and the South East usually sit towards the top of each range.
| Wraparound extensions | Guide price incl. VAT |
|---|---|
| Standard specification | £3,400 to £3,800 per m² |
| Good specification | £3,800 to £4,250 per m² |
| High specification | £4,250 to £4,700 per m² |
What approvals does a wraparound extension need in England?
English projects need planning clearance from the local council, building regulations sign-off from building control, and party wall notices where the work is on or near a shared boundary. We prepare and manage all three.
In England a wraparound extension is treated as one extension, and because it covers both the side and the rear it does not normally fit within permitted development.
What can change the price or programme?
- Both neighbours may need party wall notices.
- Roof water from an L-shape needs careful falls and outlets.
What are the steps?
- Tell us about the project. Call, use the guide price tool or send the form with a few photos and a postcode.
- We visit and measure. A surveyor checks the house, the boundaries and the ground, and discusses what is realistic.
- Price and paperwork. The design is priced line by line, and we submit the planning and building control applications.
- Construction and completion. One site lead co-ordinates every trade through to the building control certificate.
Your questions answered
How long does a wraparound take?
Around 12 to 18 weeks on site after approvals.
Can we keep part of the kitchen working?
Often, by sequencing the work so the old back wall comes out last. We agree a plan with you before starting.
Who deals with the council for a project in Welwyn Garden City?
We do. We prepare the drawings, submit planning or permitted development paperwork if needed, and arrange building control inspections.
Wraparound extensions near Welwyn Garden City
- Wraparound extensions in Hatfield
- Wraparound extensions in Hertford
- Wraparound extensions in St Albans
- Wraparound extensions in Harpenden
Learn more about wraparound extensions, or see every project we cover in Welwyn Garden City.