Building services in Stevenage
House extensions
- Single-storey extensions
- Double-storey extensions
- Side extensions
- Side return extensions
- Wraparound extensions
- Kitchen extensions
- Orangeries
- Glazed and contemporary extensions
- Porches
Loft conversions
- Dormer loft conversions
- Hip-to-gable loft conversions
- Mansard loft conversions
- Rooflight loft conversions
- Bungalow loft conversions
Garage, basement and barn conversions
New build homes
Renovations and structural work
Design and approvals
Guide prices in Stevenage
| Project | Guide range (inc VAT) |
|---|---|
| Kitchen extensions | £2,400–£3,600 per m² including a mid-range kitchen |
| Dormer loft conversions | £51,000–£72,000 for a typical rear dormer with en-suite |
| Hip-to-gable loft conversions | £58,500–£82,500 for a hip-to-gable with rear dormer |
| Garage conversions | £19,000–£32,000 for a single integral garage |
| Structural alterations and knock-throughs | £4,750–£10,000 for a typical knock-through with steel beam |
| Orangeries | £2,550–£3,600 per m² of floor area |
Building costs in the East of England run about 6% above the UK average, and the figures for Stevenage are adjusted to reflect that.
Planning permission in Stevenage
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
Building regulations approval comes from the council’s building control service or a registered building control approver. The work is inspected at key stages, such as foundations, drainage and insulation, and a completion certificate is issued at the end.
About building in Stevenage
Across the East of England, 1930s and post-war semis, newer estates and rural cottages all feature, each with different extension and loft options.
If your home is in Stevenage or close by in Hitchin, Letchworth Garden City and Welwyn Garden City, a free home visit is the first step. Stevenage has a population of around 92,000.
How it works
- 01
Visit and measured survey
A free visit to understand the project, check access and take measurements.
- 02
Design and pricing
Design options, then a fixed quote based on the chosen drawings and specification.
- 03
Approvals
Planning or permitted development confirmation, building regulations and any party wall matters.
- 04
Build and handover
Work follows the agreed programme, with inspections along the way and a completion certificate at the end.
Questions from homeowners in Stevenage
Do I need planning permission for an extension in Stevenage?
In England a single-storey rear extension is often permitted development: broadly up to 3 metres deep on a semi-detached or terraced house and 4 metres on a detached house, no higher than 4 metres, with eaves no higher than 3 metres within 2 metres of a boundary, and covering no more than half the garden. The larger home extension scheme allows up to 6 or 8 metres if you notify the council first and neighbours have a chance to comment. In conservation areas, National Parks and National Landscapes the larger home extension route, side extensions and cladding are not permitted development. Flats and houses whose rights have been removed need a planning application, and listed buildings need listed building consent.
How much does an extension cost in Stevenage?
A single-storey extension in Stevenage typically costs £2,050–£3,050 per m² of floor area, and a double-storey extension £1,750–£2,650 per m² of floor area (both floors), including VAT.
Do you work in Stevenage?
Yes. We take on extensions, loft conversions, conversions, renovations and new builds across Stevenage, including postcodes SG1.
How much does a loft conversion cost in Stevenage?
A rear dormer loft conversion in Stevenage typically costs £51,000–£72,000 for a typical rear dormer with en-suite, including VAT.
Is the home visit free?
Yes. The first visit to discuss your project and measure up for a quote is free, with no obligation.