Bletchley, Buckinghamshire
Side return extension in Bletchley
Side return extension in Bletchley: infilling the narrow passage beside a Victorian or Edwardian back addition. We measure the house, show you what the rules allow, price it in writing and build it.
We cover Bletchley (MK1, MK2 and MK3) as part of our Buckinghamshire work. Side return projects in Bletchley usually start with a drainage survey of the side passage.
Book a free site visit
Tell us about the house and we'll call to arrange a free, no-obligation visit.
How much does a side return extension cost in Bletchley?
In Bletchley, our guide for a side return extension is £2,580–£4,260 per square metre including VAT for a standard specification. South East prices run above our West Midlands baseline, mainly on labour rates and clay-soil foundations.
| Size | Guide price inc VAT |
|---|---|
| 2 m wide × 6 m deep (12 m²) | £31,000–£51,000 |
| 2.5 m wide × 7 m deep (17.5 m²) | £45,000–£74,500 |
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 side return extension in Bletchley?
The planning route for a side return extension in Bletchley is set by England's householder rules and your council.
In England the side part of a side return or wraparound must meet the side-extension rules (one storey, under 4 metres high, no more than half the width of the original house), and those rights do not apply on designated land. Because a wraparound combines a side and a rear extension, many need householder planning permission.
Because rear extensions often sit on or near the boundary, the Party Wall etc. Act 1996 usually applies in England. Notices go out one or two months before work depending on the type of work, and a surveyor's award is only needed if a neighbour does not consent.
Conservation areas, National Parks, National Landscapes and the Broads restrict permitted development, and listed buildings always need listed building consent. At the first visit we measure what is there now and tell you which route fits: permitted development, prior approval or a planning application.
What are homes in Bletchley like to extend?
Commuter semis and detached houses make up much of Bletchley, and longer gardens make England's prior approval route for deeper rear extensions worth considering.
How a side return extension in Bletchley comes together
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.
Drawings and budget
Floor plans and elevations for the options, each with a guide price.
Paperwork handled
Planning, prior approval or permitted development, Building Regulations approval, structural design and party wall notices are all handled by us.
Written price, then build
Once the design and approvals are in place, you get a fixed written price and programme, and we build through to sign-off.
Side return extensions near Bletchley
From Bletchley, the nearest places we also cover are Milton Keynes (3.5 miles) and Leighton Buzzard (6.2 miles).
- Side return extension in Milton Keynes
- Side return extension in Leighton Buzzard
- Side return extension in Newport Pagnell
- Side return extension in Flitwick
- Side return extension in Ampthill
Other work in Bletchley:
FAQ
Side return extension questions in Bletchley
Can you match the brick or stone on my Bletchley house?
We source the closest match and show you samples before ordering; reclaimed materials are often the best match on older houses.
How much does a side return extension cost in Bletchley?
As a guide, £2,580–£4,260 per square metre including VAT for a standard specification. For example, 2 m wide × 6 m deep (12 m²): about £31,000–£51,000 at that rate. Your written price follows the survey.
Do I need my neighbour's permission?
Not their permission, but in England and Wales you must serve party wall notices, and a neighbour can consent in writing or ask for a surveyor's award.
What postcode areas do you cover around Bletchley?
Including MK1, MK2 and MK3, and the surrounding Buckinghamshire area.
How long does a rear extension take to build in Bletchley?
Most single-storey rear extensions take 10 to 16 weeks on site and two-storey extensions 16 to 26 weeks, after design and approvals.
Is the site visit in Bletchley free?
Yes. We visit, measure up and talk through the options with no cost and no obligation.