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White two-story house with a modern black timber extension featuring glass doors

House extensions with 5-star reviews in Hertfordshire

Planning and building regulation support. Complete planning to build. Free 6-month window cleaning and front of house maintenance service.

Call now for your free extension quote.

What you can expect from us

Free 6-month window cleaning & front of house maintenance

Enjoy a clear view of your new space with complimentary, professional window cleaning for six months after completion. 

Multi-trade team under one roof

Forget the headache of juggling independent contractors with an internal team covering electrics, plumbing, building, and joinery. 

All work fully guaranteed

Enjoy long-term peace of mind with robust warranties that protect your investment long after we pack away the tools. 

Build the space you need with us

At Acres Property Development in Hertfordshire, we know space is precious, and occasionally your home needs to grow with you. From back and side extensions to garden offices and smart new porches, we design and build spaces that fit the way you want to live. If your wider plans include reworking unused space too, our loft conversions service gives you another way to add value.

 

You receive fixed prices and a clear plan from our first site survey, so you know what to expect. Our service covers everything from the design and planning to the final build, and UK-qualified tradesmen handle it all to British Standards. We keep your home tidy and safe, making sure your family’s comfort comes first. 

Red brick house with a modern orangery extension featuring white-framed sliding glass doors
White building corner with black doors and windows, surrounded by a gravel driveway

- Max Dening, Google

We recently had a rear extension built and couldn’t be happier with the result. The work was completed on time and within budget, exactly as promised. The team were friendly, reliable, and easy to communicate with throughout the whole process.

Why homeowners choose our extensions

  • Fixed cost quotes with no surprises

  • Free initial site survey

  • Fully qualified UK tradesmen

  • Complete design-to-build service

  • Local knowledge and planning support

  • All work guaranteed

  • We keep your home tidy during works

What’s included in our house extension service

Acres Property Development take care of design, planning, and building regulations so you do not have to chase paperwork or juggle separate contractors. Our team handles each step, from the first sketches through to the last tile on your new extension, with project management you can rely on. If your extension needs roof work, our roofing installations team can support the build with a seamless finish. You receive a detailed breakdown of costs after our free site survey, with all features and finishes agreed before we begin. 

Let us talk about your house extension plans

Phone us to get your fixed-price extension quote

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