Extensions cost in Milton Keynes
2026 prices for Buckinghamshire · South East
Extensions in Milton Keynes typically costs between £33,500 and £134,500, with most homeowners landing near £84,000. Local pricing sits about 12% above the UK average. Strong demand and overspill from London keep day rates high, though materials and waste costs are close to the national average.
£33,500 – £134,500
UK average £2,200 per m² · Milton Keynes index 112
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Extensions prices in Milton Keynes by finish level
| FINISH LEVEL | MILTON KEYNES COST | WHAT'S INCLUDED |
|---|---|---|
| Budget | £33,500 – £50,500 | Entry-level materials, existing layout retained |
| Mid-range | £48,500 – £73,000 | Better fittings, some layout change |
| Premium | £65,500 – £98,500 | High-specification materials and full redesign |
£46,200
About 55% of a typical Milton Keynes job, at South East day rates.
£37,800
Materials pricing is broadly national — this is where specification, not location, drives your total.
What affects extensions cost in Milton Keynes
Almost entirely post-1970 housing on a grid layout. Modern cavity-wall construction and generous plots make extensions and driveways quicker and cheaper than the regional average.
- Drainage runs needing diversion
- Party wall agreements with neighbours
- Poor ground conditions requiring deeper foundations
Rules in Milton Keynes
Building control and planning applications for extensions work in Milton Keynes go through Milton Keynes City Council. Confirm before booking whether your property sits in a conservation area, is listed, or is covered by an Article 4 direction — each removes permitted development rights and changes the approval route.
Serving MK2, MK6, MK9, MK14 and the surrounding Buckinghamshire area.
Find vetted trades near Milton KeynesExtensions in Milton Keynes: common questions
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