Home extensions in Bishop's Stortford
Every type of house extension in Bishop's Stortford, from single-storey kitchen extensions to two-storey additions, side returns and orangeries. We design, handle the approvals and build.
- Postcode districtsCM23
- Price regionEast of England (×1.06)
- Planning rulesEngland
- Site visitFree, no obligation
Popular extension prices in Bishop's Stortford
Every figure below is a guide for Bishop's Stortford, adjusted for East of England build costs (×1.06) and including VAT. Design and council fees are shown separately on each page.
| Extension type | Example size | Standard spec (inc VAT) |
|---|---|---|
| Extensions over a garage | 12 m² | £26,500 – £34,500 |
| Conservatory replacement extensions | 14 m² | £31,500 – £41,000 |
| Kitchen extensions | 20 m² | £44,500 – £56,500 |
| Orangery extensions | 16 m² | £47,000 – £59,500 |
| Side return extensions | 11 m² | £27,500 – £35,000 |
Choosing the right extension in Bishop's Stortford
Across the East of England many houses sit on generous plots, and single-storey and wraparound extensions are a natural fit.
Depending on the plot, double-storey extensions and bungalow extensions are often the strongest options, with single-storey rear extensions worth considering where there is room.
Approvals for an extension in Bishop's Stortford
In England a single-storey rear extension can usually go up to 3 m beyond the original rear wall of a semi-detached or terraced house, or 4 m on a detached house, without a planning application, provided it is no more than 4 m high, keeps eaves to 3 m within 2 m of a boundary and, with other buildings, covers no more than half the land around the original house. The larger home extension prior approval scheme raises those depths to 6 m and 8 m, with neighbours notified and a 42-day decision.
In England a single-storey side return infill is often permitted development if it stays within the height limits and is no wider than half the width of the original house. Conservation areas, listed buildings and flats always need an application, and the boundary wall usually brings in the Party Wall Act.
In a conservation area, national park, National Landscape, the Broads or a World Heritage Site the permitted development limits are tighter (no side or two-storey extensions without an application). Listed homes need listed building consent, and if permitted development rights have been removed, any extension needs an application.
If the work involves a shared wall, building on the boundary, or digging foundations within 3 m (sometimes 6 m) of a neighbour's building, the Party Wall etc. Act 1996 applies and notice must be served before work starts: two months for work to a party wall, one month for new walls on the boundary and for excavations.
Applications are decided by the local planning authority (your district, borough or unitary council).
Bishop's Stortford and surrounding towns
We cover Bishop's Stortford and the postcode districts CM23. Nearby, we also take on projects in Hoddesdon (10 miles), Hertford (11 miles), Cheshunt (14 miles), Stevenage (16 miles), Welwyn Garden City (16 miles). Just over the Essex border, Harlow is about 7 miles away.
All extension types we build in Bishop's Stortford
- Side return extensions · from £19,000
- Extensions over a garage · from £25,000
- Single-storey rear extensions · from £22,000
- Annexe extensions · from £58,000
- Orangery extensions · from £31,500
- Home office extensions · from £16,500
- Utility and boot room extensions · from £14,500
- Bedroom extensions · from £27,500
- Wraparound extensions · from £38,000
- Porch extensions · from £4,200
- Conservatory replacement extensions · from £21,000
- Building regulations for extensions · from £950
- Side extensions · from £23,000
- Extension plans and drawings · from £1,250
- Double-storey extensions · from £40,000
- Pitched roof extensions · from £23,500
- Glass box extensions · from £31,500
- Bungalow extensions · from £27,500
- Planning permission for extensions · from £350
- Flat roof extensions · from £22,000
- Timber frame extensions · from £22,000
- Kitchen extensions · from £28,500
Free site visit
We visit your Bishop's Stortford home, measure up, talk through what you want and check the planning position.
Design and approvals
We draw the design, agree it with you and handle planning or permitted development checks and building regulations.
Fixed written price
With the design and specification agreed, you get a fixed written price and a start date.
Build and sign-off
Our team builds the extension, keeps you updated weekly and finishes with building control sign-off.
Questions about extensions in Bishop's Stortford
How much does an extension cost in Bishop's Stortford?
Using our East of England factor (×1.06), a standard-spec single-storey extension of 20 m² is a guide £43,000 to £55,500 including VAT, and a 32 m² two-storey extension £61,000 to £80,000. Your written price follows the survey.
Do you cover all of Bishop's Stortford?
Yes, including the surrounding parts of Hertfordshire. Site visits are free and there is no obligation.
Can I get a price before anyone visits?
Yes. This page shows guide prices adjusted for Bishop's Stortford, and the guide-price tool gives a range for your own size and finish in about a minute.
How long does an extension take in Bishop's Stortford?
Usually 2 to 4 months of design and approvals, then 10 to 16 weeks on site for a single-storey extension or 16 to 24 weeks for two storeys.
Book a free site visit in Bishop's Stortford
We will measure up, check the planning position and give you honest guide figures.
- Free, no-obligation site visit
- Planning route checked before you spend on drawings
- Written price once the design is agreed
- Building control sign-off at the end
Prefer to talk? Call 0800 088 6341 or .
Book a free site visit
Tell us a little about the project and we will arrange a time.