Covering Welwyn Garden City
Our coverage around Welwyn Garden City (AL8) also includes Hatfield (3 miles to the south) and Hertford.
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.
Which projects do we build in Welwyn Garden City?
Extensions
- Single-storey extensions in Welwyn Garden City
- Double-storey extensions in Welwyn Garden City
- Side return extensions in Welwyn Garden City
- Wraparound extensions in Welwyn Garden City
- Kitchen extensions in Welwyn Garden City
- Orangeries in Welwyn Garden City
- Porches in Welwyn Garden City
- Garden annexes in Welwyn Garden City
Lofts and upward extensions
- Loft conversions in Welwyn Garden City
- Dormer loft conversions in Welwyn Garden City
- Hip-to-gable loft conversions in Welwyn Garden City
- Mansard loft conversions in Welwyn Garden City
- Bungalow and upward extensions in Welwyn Garden City
Conversions
- Garage conversions in Welwyn Garden City
- Basement and cellar conversions in Welwyn Garden City
- House-to-flat conversions in Welwyn Garden City
New builds and renovation
- New-build homes in Welwyn Garden City
- Knock down and rebuild in Welwyn Garden City
- House renovations in Welwyn Garden City
- Structural alterations in Welwyn Garden City
- Re-roofing in Welwyn Garden City
Design, kitchens and bathrooms
- Architectural design and planning in Welwyn Garden City
- Kitchen installation in Welwyn Garden City
- Bathrooms and en-suites in Welwyn Garden City
How is building work approved in Welwyn Garden City?
Projects in England go through two separate checks. Planning (or confirmation that the work is permitted development) comes from the district, borough or unitary council, and building regulations approval comes from the council’s building control team or a registered building control approver. Where work touches a shared wall or digs near a neighbour’s foundations, the Party Wall etc. Act 1996 applies.
What does a project cost in Welwyn Garden City?
These are UK-wide guide ranges, including VAT where it applies. The price for a project in Welwyn Garden City is fixed in writing once the design and specification are agreed.
| Project | Typical guide price |
|---|---|
| Single-storey extensions | £2,600 to £4,000 per m² |
| Double-storey extensions | £2,400 to £3,850 per m² |
| Kitchen extensions | £2,600 to £4,000 per m², plus the kitchen |
| Loft conversions | £30,000 to £110,000 |
| Dormer loft conversions | £50,000 to £90,000 |
| Garage conversions | £12,000 to £54,000 |
| House renovations | £600 to £2,800 per m² |
| New-build homes | £2,000 to £3,600 per m² |
Questions from Welwyn Garden City homeowners
Do you cover Welwyn Garden City?
Yes. We design and build extensions, loft conversions, conversions and new homes in Welwyn Garden City and across Hertfordshire.
Do you handle the council paperwork for projects in Welwyn Garden City?
Yes. We prepare drawings, deal with planning or permitted development, apply for building control approval and serve party wall notices where they apply.
Can I live at home during a project in Welwyn Garden City?
For most extensions and loft conversions, yes. For whole-house renovations and rebuilds, most people move out for part of the work.

