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8 miles from our base

Extensions in Grafham

In Grafham, extensions are often about views and the garden. We design light-filled extensions and garden rooms with wide glazing, managed from planning through to completion.

  • Garden room
  • Single storey
  • Wraparound
  • Planning
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Extending in Grafham

The right extension for your Grafham home

Detached homes and cottages here suit garden rooms, single storey kitchen extensions with bi-fold or sliding doors, and wraparounds on larger plots.

Views and outdoor space are a big part of life here, so we often design extensions with wide glazing and seamless links to the garden, managed from planning through to completion.

  • Free site visit and honest budget advice
  • Design, planning and building regs handled for you
  • One team from drawings to handover

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Popular extensions in Grafham

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FAQs

Extensions in Grafham: your questions

Can’t see your question? Call us on 01480 272 600 or send us a message.

Do you build house extensions in Grafham?

Yes. Tier One Developments designs and builds single storey, double storey, side return, wraparound and kitchen extensions in Grafham, plus loft and garage conversions. We’re based at Wyboston Lakes, about 8 miles away.

Do I need planning permission to extend my house in Grafham?

Not always. Many single storey rear extensions can be built under permitted development (up to 3m deep for semi-detached and terraced houses, or 4m for detached). Larger and two storey extensions usually need permission from Huntingdonshire District Council. We check this at the first visit.

How long does an extension take in Grafham?

Allow time for design and approvals first: householder planning applications are usually decided within about eight weeks. Most single storey extensions then take a few months on site. We give you a realistic programme with your quote.

Can you handle the drawings and planning for my Grafham extension?

Yes. We provide the design, planning or lawful development certificate application, building regulations drawings, structural calculations and Party Wall notices where needed, then build the extension, all as one team.

Will an extension add value to my home in Grafham?

A well-designed extension usually adds useful space and value, especially extra bedrooms, bathrooms and open-plan kitchens. It is also often cheaper than moving once you account for stamp duty, fees and removals.

More extension types

Guides

Planning your extension

All articles
Guides12 Nov 2026 · 6 min readHow to plan a house extension, step by stepFrom the first idea to the final sign-off: the steps to planning an extension, in the right order, and where most projects go wrong.Read article Guides12 Nov 2026 · 5 min readHow much does a house extension cost? Planning your budgetEvery extension is different, but the same factors drive the cost. Here’s what affects your budget and how to avoid surprises.Read article Guides12 Nov 2026 · 6 min readDo I need planning permission for an extension?Many extensions can be built under permitted development, without a full planning application. Here’s how the rules work and when you’ll need permission.Read article

Extending in Grafham?

Let’s talk about your extension

Free site visit, honest advice and one team from drawings to handover. No obligation.

Areas we cover

From our HQ to Grafham

Grafham is about 8 miles from our base at Wyboston Lakes. We build extensions across the area.

Extensions near Grafham

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