As one of Milton Keynes' most established home extension builders, Crownhill Building Services has been transforming properties across the city for over 20 years. From the grid road estates of central MK to the older villages absorbed into the borough, we understand the unique mix of housing styles that make Milton Keynes such a varied place to build.

Milton Keynes is home to a wide range of property types — from the distinctive 1970s and 80s estates designed by the Development Corporation, to modern new-builds and period properties in the original villages. This variety means every extension project we take on requires a tailored approach.

Whether you live in a detached house on one of MK's generous plots or a semi-detached home on a grid square estate, we've completed hundreds of extensions across the city. Many MK properties benefit from good-sized gardens and relatively straightforward access, making them ideal candidates for single or double storey rear and side extensions.

We're based at the Bucks-Biz Business Centre in Bletchley, which means we're never more than a few minutes from any job in Milton Keynes. This keeps our costs down and means we can respond quickly when you need us on site.

Property Types in Milton Keynes

Development Corporation estates, modern new-builds, Victorian and pre-war village houses, 1990s-2000s private developments

Why Milton Keynes Homeowners Choose Us

Local to You

Based in Bletchley, we're just minutes from Milton Keynes. Less travel means lower costs and faster response times.

20+ Years Experience

We've been building extensions across Milton Keynes since 2006. We know the local housing stock and planning requirements.

Fixed Price Quotes

No hidden extras or surprise costs. The price we quote is the price you pay, guaranteed in writing.

Fully Insured

Public liability insurance up to £2 million and a 12-month parts and labour warranty on all work.

Also see Spectra Extensions in Milton Keynes — our single storey extension service using advanced construction technology.

Planning an Extension in Milton Keynes?

Get in touch for a free, no-obligation consultation. We'll visit your property, discuss your ideas, and provide a detailed quote.