Home Extension Builders in Milton Keynes

Milton Keynes is unlike any other city in the UK. It was planned from scratch in the late 1960s and built out grid square by grid square over the following three decades — which means the housing stock spans a wider range of eras styles and construction methods than almost anywhere else in England. A builder who knows MK understands that extending a Victorian terrace in Wolverton is a fundamentally different project to extending a 1990s detached home in Westcroft or a 2000s new-build in Oakgrove. We know all of them.

Crownhill Building Services has completed more home extension projects across Milton Keynes than we can count. The ground conditions across different parts of MK. The planning requirements for different property types. The brickwork specifications that match different decades of construction. This is local knowledge that only comes from twenty years of working in the same city with the same team.

Home Extensions Across Every Part of Milton Keynes

We cover every grid square and every surrounding area within MK. From Bletchley and Fenny Stratford in the south to Great Linford and New Bradwell in the north. From Stony Stratford and Wolverton in the west to Broughton and Oakgrove in the east. Wherever your property sits within Milton Keynes we have almost certainly worked in that street or the streets around it.

Browse our full portfolio of completed extensions across Milton Keynes to see the range of work we deliver — from luxury rear extensions in Westcroft to double storey front extensions in Newport Pagnell.

Types of Home Extension We Build in Milton Keynes

Single storey rear extensions are the most popular project across MK — opening up the ground floor to create connected kitchen and dining spaces that change how a house functions day to day. Most fall within Permitted Development and require no planning application.

Double storey extensions add bedroom and bathroom space at first floor level alongside extended ground floor living areas. They almost always require a full planning application to Milton Keynes City Council — we manage that process from drawings to decision as part of the project.

Kitchen extensions combine the rear extension with a new kitchen installation — managing both elements under one contract with one point of contact throughout. No separate bills for a builder and a kitchen fitter. One fixed price from the outset.

Planning Permission in Milton Keynes

Most single storey rear and side extensions in Milton Keynes fall within Permitted Development. Detached houses can extend up to 4 metres to the rear without a planning application. Terraced and semi-detached properties are permitted up to 3 metres. Some areas of MK — particularly the conservation areas in Wolverton Stony Stratford and Newport Pagnell — have more complex planning requirements. We confirm your exact position at the initial site visit. Read our full guide on planning permission for home extensions in Milton Keynes.

How Much Does a Home Extension Cost in Milton Keynes?

The cost of your extension depends on size specification and the specifics of your plot. We provide a fixed price agreed in writing before work starts — no variations through the build and no surprises on the final invoice. See our full home extension cost guide for Milton Keynes.

How Long Does an Extension Take in Milton Keynes?

A single storey extension within Permitted Development typically takes ten to fourteen weeks from first call to completion certificate. Double storey projects that require full planning permission take longer due to the council determination period. Read our full guide on how long a home extension takes in Milton Keynes.

Next Step

We offer a free no-obligation site visit to every Milton Keynes homeowner considering an extension. We look at the property assess the ground confirm your planning position and give you an honest picture of what is possible before you commit to anything.

Get in touch today to arrange your free consultation.