Rear extension planning drawings in Kempston

What do rear extension planning drawings cost in Kempston?

As a guide, £1,000–£2,500 including VAT for a single-storey rear extension, or £2,000–£3,500 for a two-storey scheme. A householder planning application in England costs £548 (£575 for applications made from 8 December 2026), and a lawful development certificate for proposed work costs half the householder fee. Ground conditions, glazing, the roof and how far the house is opened up move the final figure within the range.

Do you need planning permission for a rear extension in Kempston?

The planning route for a rear extension in Kempston is set by England's householder rules and your council.

A two-storey rear extension can be permitted development in England only if it projects no more than 3 metres, stays at least 7 metres from the rear boundary, matches the existing roof pitch and has obscure-glazed upper side windows. In practice most double-storey rear extensions go through a householder planning application.

Councils aim to decide householder applications within 8 weeks of validation, and prior approval within 42 days.

Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. Before any drawing we look up the property's history with the council, because earlier extensions and removed rights change the answer.

What are homes in Kempston like to extend?

Kempston mixes Victorian terraces with 1930s semis, so both side returns and full-width kitchen extensions suit houses here. Planning applications in Kempston go to the local planning authority covering Kempston, and we check its local design guidance for rear extensions before drawing.

How a rear extension in Kempston comes together

1. Survey visit

   We visit free of charge, measure up, check access, drainage and neighbours' extensions, and note what you want the room to do.

2. Drawings and budget

   Floor plans and elevations for the options, each with a guide price.

3. Paperwork handled

   Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.

4. Build and sign-off

   We build to the approved drawings with regular updates, then hand over the building control completion certificate and any guarantees from suppliers.

Rear extension planning drawings near Kempston

We also build rear extensions in nearby Kempston Hardwick (1.8 miles) and Bedford (1.9 miles).

• Rear extension planning drawings in Kempston Hardwick
• Rear extension planning drawings in Bedford
• Rear extension planning drawings in Ampthill
• Rear extension planning drawings in Flitwick
• Rear extension planning drawings in Sandy

Other work in Kempston:

• Single-storey rear extension
• Two-storey rear extension
• Kitchen-diner rear extension
• Side return extension
• Wraparound extension
• Glazed rear extension

All rear extensions in Kempston