Oxford & Buckinghamshire home extensions frequently asked questions

Planning FAQs

Questions and answers regarding planning and applications

Cost FAQs

Questions and answers regarding the costs of a house extension

General FAQs

Other questions and answers about extensions

Planning and Application FAQs

Planning to build a home extension in Oxfordshire or Buckinghamshire? Here are the answer to some commonly asked questions, if you would like a quote or to discuss an extension with us, feel free to call us on 0800 124 4646 or fill in the form and we would be more than happy to help you.

Can extension builders near me in Buckinghamshire help with design?Joseph2025-10-21T10:35:55+00:00

Can extension builders near me in Buckinghamshire help with design?

Absolutely. Many Buckinghamshire builders collaborate with architects and planning consultants to produce 3D designs, layout drawings, and planning submissions. Ask for a design-and-build package for smoother communication and cost control.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Do local Oxford extension builders handle planning permission?Joseph2025-10-21T10:36:25+00:00

Do local Oxford extension builders handle planning permission?

Most professional Oxford extension builders manage the full process — from planning applications to building regulations and final completion. Many have in-house architects or work with local design partners familiar with Oxford City Council requirements.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

What is a party wall notice and do I need one?Joseph2025-10-21T10:37:07+00:00

What is a party wall notice and do I need one?

If your extension work affects a shared wall or boundary, you must serve a party wall notice to neighbours at least two months before starting work.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

What is permitted development for extensions in Oxford or Buckinghamshire?Joseph2025-10-21T10:37:18+00:00

What is permitted development for extensions in Oxford or Buckinghamshire?

You can usually extend up to 3 m (terraced) or 4 m (detached) without permission, provided you don’t exceed 50% of your garden area and use similar materials. Always confirm with your council before you start.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

What are the planning rules for extensions in Buckinghamshire and Oxford?Joseph2025-10-21T10:38:49+00:00

What are the planning rules for extensions in Buckinghamshire and Oxford?

Each district (e.g., Aylesbury Vale, Cherwell, South Oxfordshire) has slightly different guidelines. Generally, extensions must not exceed half the original house’s footprint and should be built with materials matching the existing property.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How long does it take to build a home extension?Joseph2025-10-21T10:39:08+00:00

How long does it take to build a home extension?

Most single-storey extensions take 10–14 weeks from groundwork to completion. Two-storey or complex designs can take up to six months, depending on planning approval and weather.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Do I need planning permission for a house extension in Oxford or Buckinghamshire?Joseph2025-10-21T10:39:31+00:00

Do I need planning permission for a house extension in Oxford or Buckinghamshire?

Many small extensions fall under permitted development rights, but if your property is listed or in a conservation area, you’ll likely need full planning permission. Always check with your local council (Oxford City Council or Buckinghamshire Council) before starting work.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Stay Dry Affordable Home Extensions in Buckinghamshire & Oxford

Extension Cost related FAQs

Need to plan for the cost of building a home extension? Here are the answer to some commonly asked questions, if you would like a quote or to discuss an extension with us, feel free to call us on 0800 124 4646 or fill in the form and we would be more than happy to help you.

Are building regulations included in the quote from local builders?Joseph2025-10-21T10:32:53+00:00

Are building regulations included in the quote from local builders?

Always confirm. Reputable builders include building control inspections and certification in their total quote. These approvals are essential for resale and insurance compliance.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How do I avoid hidden costs with local extension builders?Joseph2025-10-21T10:34:43+00:00

How do I avoid hidden costs with local extension builders?

Request a fixed-price contract with all materials and planning fees listed. Transparent builders will include groundwork, electrical, and plumbing costs upfront. It is really important to discuss this sort of thing with the company you use before you start.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How much does it cost to hire an extension builder near me in Oxfordshire?Joseph2025-10-21T10:35:28+00:00

How much does it cost to hire an extension builder near me in Oxfordshire?

Prices vary by complexity, but most Oxfordshire builders charge between £1,800–£2,800 per m² for complete extensions. Get detailed, itemised quotes to compare finishes, labour, and materials.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Are local extension builders cheaper than national companies?Joseph2025-10-24T16:20:49+00:00

Are local extension builders cheaper than national companies?

Often yes. Local builders in Oxford and Buckinghamshire have lower overheads and better supplier relationships, meaning more competitive pricing and faster turnaround times. This is certainly the case for Stay Dry Extensions Limited who can offer you a great deal.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How can I reduce the cost of my home extension?Joseph2025-10-21T10:38:16+00:00

How can I reduce the cost of my home extension?

Simplify the layout, avoid bespoke glazing, reuse existing foundations if possible, and hire an experienced local extension builder such a Stay Dry Extensions Limited to minimise delays.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Is a two-storey extension cheaper than two single-storey ones?Joseph2025-10-21T10:38:27+00:00

Is a two-storey extension cheaper than two single-storey ones?

Yes — a two-storey extension generally offers better value per square metre, since the roof and foundation are shared.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

What’s the cost per square metre for a house extension in Oxford?Joseph2025-10-21T10:38:37+00:00

What’s the cost per square metre for a house extension in Oxford?

Expect to pay between £1,800–£2,800 per m² for standard builds, and up to £3,000/m² for premium finishes or complex structures like basements.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How much does a house extension cost in Oxford or Buckinghamshire?Joseph2025-10-21T10:39:53+00:00

How much does a house extension cost in Oxford or Buckinghamshire?

The average house extension in Oxford or Buckinghamshire costs between £1,800–£2,800 per m², depending on design, materials, and size. Single-storey builds start around £45,000, while two-storey extensions often exceed £80,000. For an accurate quote for your extension please contact us.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Other Home Extension FAQs

Are building regulations included in the quote from local builders?Joseph2025-10-21T10:32:53+00:00

Are building regulations included in the quote from local builders?

Always confirm. Reputable builders include building control inspections and certification in their total quote. These approvals are essential for resale and insurance compliance.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How do I avoid hidden costs with local extension builders?Joseph2025-10-21T10:34:43+00:00

How do I avoid hidden costs with local extension builders?

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How much does it cost to hire an extension builder near me in Oxfordshire?Joseph2025-10-21T10:35:28+00:00

How much does it cost to hire an extension builder near me in Oxfordshire?

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Are local extension builders cheaper than national companies?Joseph2025-10-24T16:20:49+00:00

Are local extension builders cheaper than national companies?

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How can I reduce the cost of my home extension?Joseph2025-10-21T10:38:16+00:00

How can I reduce the cost of my home extension?

Simplify the layout, avoid bespoke glazing, reuse existing foundations if possible, and hire an experienced local extension builder such a Stay Dry Extensions Limited to minimise delays.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Is a two-storey extension cheaper than two single-storey ones?Joseph2025-10-21T10:38:27+00:00

Is a two-storey extension cheaper than two single-storey ones?

Yes — a two-storey extension generally offers better value per square metre, since the roof and foundation are shared.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

What’s the cost per square metre for a house extension in Oxford?Joseph2025-10-21T10:38:37+00:00

What’s the cost per square metre for a house extension in Oxford?

Expect to pay between £1,800–£2,800 per m² for standard builds, and up to £3,000/m² for premium finishes or complex structures like basements.

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

How much does a house extension cost in Oxford or Buckinghamshire?Joseph2025-10-21T10:39:53+00:00

How much does a house extension cost in Oxford or Buckinghamshire?

If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

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Q: Can extension builders near me in Buckinghamshire help with design?

Absolutely. Many Buckinghamshire builders collaborate with architects and planning consultants to produce 3D designs , layout drawings , and planning submissions . Ask for a design-and-build package for smoother communication and cost control. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: Do local Oxford extension builders handle planning permission?

Most professional Oxford extension builders manage the full process — from planning applications to building regulations and final completion. Many have in-house architects or work with local design partners familiar with Oxford City Council requirements. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: What is a party wall notice and do I need one?

If your extension work affects a shared wall or boundary , you must serve a party wall notice to neighbours at least two months before starting work. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: What is permitted development for extensions in Oxford or Buckinghamshire?

You can usually extend up to 3 m (terraced) or 4 m (detached) without permission, provided you don’t exceed 50% of your garden area and use similar materials. Always confirm with your council before you start. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: How long does it take to build a home extension?

Most single-storey extensions take 10–14 weeks from groundwork to completion. Two-storey or complex designs can take up to six months , depending on planning approval and weather. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: Do I need planning permission for a house extension in Oxford or Buckinghamshire?

Many small extensions fall under permitted development rights , but if your property is listed or in a conservation area, you’ll likely need full planning permission. Always check with your local council (Oxford City Council or Buckinghamshire Council) before starting work. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: Are building regulations included in the quote from local builders?

Always confirm. Reputable builders include building control inspections and certification in their total quote. These approvals are essential for resale and insurance compliance. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: How do I avoid hidden costs with local extension builders?

Request a fixed-price contract with all materials and planning fees listed. Transparent builders will include groundwork, electrical, and plumbing costs upfront. It is really important to discuss this sort of thing with the company you use before you start. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Q: How much does it cost to hire an extension builder near me in Oxfordshire?

Prices vary by complexity, but most Oxfordshire builders charge between £1,800–£2,800 per m² for complete extensions. Get detailed, itemised quotes to compare finishes, labour, and materials. If you would like to have a chat with us, ask any questions or get a quote, just call us free on 0800 124 4646

Trusted by All of our customers

We’re absolutely thrilled with our new wrap-around home extension in Oxfordshire, built by the amazing team at Stay Dry Extensions. From the very first consultation, they were professional, friendly, and full of great ideas.

The whole project — from design and planning permission through to the final build — was handled smoothly and on schedule. We stayed in the house while the work was done, and the team kept everything tidy and safe throughout.

The quality of the finish is outstanding, and it’s completely transformed how we use our space. We now have a bright, open-plan kitchen and family area that connects perfectly with the garden.

We’d highly recommend Stay Dry Extensions to anyone looking for home extension builders in Oxfordshire or Buckinghamshire. They’re a professional, affordable extension company that truly cares about their customers and delivers excellent value for money.

Thanks again for helping us add so much space — and value — to our home!

Mr John Douglas – Oxfordshire

Don't Move House - Add an extension to your home

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We help you keep your home if it needs to grow

If your family grows or you need a bigger home, you don’t need to move. You can often save a fortune by adding an extension to make your home match your needs.

You can add a kitchen extension, or additional bedrooms, a conservatory or Garden room or even a basement to turn your house, in to your dream home.

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Frequently Asked Questions

Planning FAQs

Cost FAQs

General FAQs

Planning and Application FAQs

Extension Cost related FAQs

Other Home Extension FAQs

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We help you keep your home if it needs to grow

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