Rear extension planning drawings in Amersham

What do rear extension planning drawings cost in Amersham?

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 Amersham?

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

England's rules allow a rear extension of more than one storey without an application only when it is no deeper than 3 metres and at least 7 metres from the boundary opposite the rear wall, and never on designated land. Most two-storey schemes need householder planning permission.

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 Amersham like to extend?

Commuter semis and detached houses make up much of Amersham, and longer gardens make England's prior approval route for deeper rear extensions worth considering.

How a rear extension in Amersham comes together

1. Free site visit

   We measure the house and garden, look at the back wall, drainage and boundaries, and talk through what you want from the space.

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 Amersham

From Amersham, the nearest places we also cover are Amersham on the Hill (0.7 miles) and Chesham (2.4 miles).

• Rear extension planning drawings in Amersham on the Hill
• Rear extension planning drawings in Chesham
• Rear extension planning drawings in Beaconsfield
• Rear extension planning drawings in Chorleywood
• Rear extension planning drawings in Chalfont St Peter

Other work in Amersham:

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

All rear extensions in Amersham