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What a single-storey extension actually costs in Milton Keynes
A realistic breakdown of groundworks, steels, roofing and finishes — and the three things that most often push a budget over.
Trusted by Homeowners Across Milton Keynes
Traditional craft, modern homes you can Trust
Extensions, new builds, refurbishments and carpentry delivered by a multi-skilled team applying modern designs and materials.
- Fully insured, time-served builders
- Modern materials, traditional standards
Hero image — completed extension, Milton Keynes
- Extensions
- New Builds
- Refurbishments
- Carpentry
- Roofing
- Groundworks
- Property Maintenance
- Loft Conversions
About us
We are a team of traditional, multi-skilled and experienced builders applying modern designs and materials. From single-storey extensions to full new builds, we take on every stage of the work ourselves — so the standard never changes hands.
Project photo — rear extension
Project photo — new build shell
Project photo — kitchen refurbishment
Project photo — bespoke carpentry
Why Choose Us
We are committed to delivering reliable, high-quality building work.
Every project runs with one point of contact, a fixed written quote and a team that turns up when it says it will.
Get a Free Quote01
Experienced Professionals
Our tradespeople bring years of hands-on site experience to every job, handling structural work, carpentry and finishes with the same care.
Photo — team on site
02
Modern Design & Materials
Traditional building methods paired with current materials and detailing, so the work performs as well as it looks.
Photo — modern materials
03
Transparent Pricing
A clear written quote before anything starts. No hidden extras, and no surprise invoices at the end of the build.
Photo — quote and plans
04
Finished On Schedule
Realistic programmes agreed up front and kept to, with weekly updates so you always know what happens next.
Photo — completed handover
Who we are
Committed to exceptional homes
NMT Property Services & Developments is a Milton Keynes building contractor providing people with exceptional homes. We specialise in extensions, new builds and full property refurbishments.
Get a Free QuoteTeam photo — NMT Developments on site
Services
Complete property services under one roof
From first drawings to final snagging, NMT handles the whole build. Our team is trained across the trades, so fewer contractors means fewer delays.
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Service photo — extension in progress01 / EXTENSIONS
Extensions
Get a QuoteSingle and double-storey extensions, wrap-arounds and rear kitchen extensions — from foundations and steels through to plastering and decoration.
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Service photo — new build plot02 / NEW BUILDS
New Builds
Get a QuoteComplete new build homes delivered from groundworks to handover, built to current regulations with modern insulation and detailing throughout.
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Service photo — refurbished interior03 / REFURBISHMENT
Refurbishments
Get a QuoteFull property refurbishments including kitchens, bathrooms, rewires, replastering and flooring — whole-house work managed end to end.
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Service photo — bespoke joinery04 / CARPENTRY
Carpentry & Joinery
Get a QuoteFirst and second fix carpentry, bespoke fitted storage, staircases, doors and timber framing — made and installed by our own joiners.
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Service photo — roofing works05 / ROOFING
Roofing & Maintenance
Get a QuotePitched and flat roofing, re-roofs, fascias and guttering, plus ongoing property maintenance for landlords and managing agents.
The NMT Standard
Built properly, the first time
Fast Response
We reply to every enquiry quickly and get out to site for a proper look before quoting, so the figure you get is the figure you pay.
Multi-Skilled Team
Groundworks, brickwork, carpentry and finishing all handled in-house, which keeps programmes tight and standards consistent.
Fully Insured
Public liability cover and building-regulation compliant work throughout, with certification handed over on completion.
10+
Years building
150+
Projects delivered
100%
Directly employed
MK
& surrounding areas
Testimonials
What our customers say
“NMT built our rear extension start to finish. Tidy, on time, and the finish is genuinely excellent.”
Sarah Whitfield
Homeowner, Newport Pagnell
“Full refurbishment on a tired rental. They handled everything and kept us updated every week.”
David Ellison
Landlord, Milton Keynes
“The carpentry is the standout — bespoke fitted storage that looks like it was always there.”
Rachel Coombes
Homeowner, Woburn Sands
Our team
Meet the trades behind the builds
Team portrait
Nick Thompson
Director & Site Manager
Team portrait
Mark Reeves
Lead Carpenter & Joiner
Team portrait
Tom Hargreaves
Bricklayer & Groundworks
Team portrait
Liam Doyle
Project Coordinator
Work With Us
Subcontractors and trades welcome
We work with reliable trades across Milton Keynes who want consistent work and to be paid on time. If that sounds like you, get in touch.
- Consistent workload
- Paid on schedule
- Local projects
Site photo — NMT team at work
We are based in Milton Keynes and work across the surrounding areas including Newport Pagnell, Woburn Sands, Bletchley, Olney and Bedford. If you are slightly further out, call us and we will let you know honestly.
Yes. We visit the property, discuss what you want and issue a detailed written quote at no cost. The quote breaks down labour and materials so you can see exactly where the money goes.
We work alongside architects and structural engineers and can point you to people we trust. All our work is carried out to current building regulations and we arrange inspections at each stage.
A single-storey rear extension usually runs 8 to 12 weeks depending on size, groundworks and finishes. You get a written programme before we start and weekly updates as the build progresses.
Yes — NMT Developments Ltd carries full public liability insurance. We are happy to provide documentation before any work begins.
We do. Alongside extensions and new builds we handle carpentry, roofing repairs and general property maintenance, including ongoing work for landlords and managing agents.
Insights
Advice from the site
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Permitted development or full planning: which do you need?
Most rear extensions fall under permitted development, but the limits are easy to trip. Here is how to check before you spend anything.
Get in touch
Reliable building work you can trust.
Tell us about your project and we will arrange a visit and a free written quote.