Home Extension Company in Norfolk

With Birch Construction, you’re not just getting an extension. You’re getting a space built with care, precision and integrity.

Home Extensions that suit your lifestyle and enhance your home

Birch Construction is a trusted home extension company designing and building bespoke extensions across Norfolk that suit your lifestyle and enhance your home. Whether you need space for family life, a home office or more open-plan living, we offer a complete, end-to-end service built on quality, clear communication and trusted local craftsmanship. As timber frame specialists, we can also offer faster build times and greater flexibility in design, making your extension both beautiful and efficient.

Working closely with skilled trades and architects, we create extensions that look great and enhance how you live.

Crafting Luxury, Building Excellence is more than just a tagline. It’s how we approach your project, big or small.

Why choose Birch Construction for your next Home Extension project?

Skilled, friendly Norfolk-based team

Complete service from design to completion

Transparent pricing and practical advice

Proven experience with bespoke extensions & renovations

A smooth, stress-free process with clear communication

Timber frame expertise for faster, sustainable builds

Our Home Extension Services in Norfolk

Single-Storey Extensions

A cost-effective way to extend your home. Ideal for expanding kitchens, lounges or dining areas, single-storey extensions create light-filled, functional living spaces without complex structural changes. If you're looking to speed up the process, our timber frame construction offers a quicker, energy-efficient solution.

Perfect for: Kitchen-diners, playrooms, utility spaces, home office

Types: Side single-storey extensions, rear single-storey extensions

Build time: 6–16 weeks

Estimated cost: £40,000–£140,000 depending on size, materials, complexity, finishes, and any additional work required

Side Extensions

Make the most of unused space at the side of your property. These practical extensions are perfect for creating utility rooms, larger kitchens, or extra bedrooms, while improving the natural flow and layout of your home. Timber frame builds can help simplify the structure and reduce disruption.

Perfect for: Enlarged kitchens, utility rooms, extra bedrooms, open-plan layouts, home office

Types: Single-storey side extensions, side return extensions, wraparound extensions, double-storey side extensions, glass side extensions

Build time: 8–20 weeks

Estimated cost: £30,000–£100,000 depending on design, complexity, and finishes

Double-Storey Extensions

A transformational way to increase space across two floors without significantly increasing your home's footprint. These extensions are ideal for growing families and those looking to add long-term value to their property.

For larger projects, choosing a home extension company with the right experience can make all the difference. Using timber frame techniques, we can reduce overall build times and achieve impressive results with less on-site disruption.

Perfect for: Additional bedrooms, home offices, larger kitchens, en-suite bathrooms

Types: Rear two-storey extensions, side two-storey extensions, wraparound extensions, contemporary/glass extensions

Build time: 12–30 weeks

Estimated cost: £65,000–£150,000 depending on size, layout, and internal works

Rear Extensions

Maximise garden space and natural light with a rear extension. This popular choice creates open-plan layouts ideal for modern family living, entertaining, and better indoor-outdoor flow. Timber frame rear extensions are especially popular for their speed, insulation, and compatibility with glazed finishes.

Popular features: Bi-fold doors, skylights, brick or glazed finishes

Types: Single-storey rear extensions, double-storey rear extensions, wraparound extensions, glazed rear extensions

Build time: 6–12 weeks (small builds) or 12–20 weeks (larger/complex builds)

Estimated cost: £40,000–£140,000 depending on size and complexity

Timber Frame Extensions

Quick to build and energy-efficient, timber frame extensions use prefabricated wooden panels for faster construction and excellent insulation. A great option for eco-conscious homeowners and those looking to reduce build time, and one of our areas of specialist expertise. Whether built off-site or customised on-site, our timber frame solutions are known for quality, longevity, and architectural flexibility.

Perfect for: Fast builds, modern designs, sustainable homes

Types: Prefabricated off-site panels, on-site custom timber builds

Build time: 8–20 weeks

Estimated cost: £1,400–£2,400/m² | Premium oak frames: £2,400–£3,000/m²

Get in Touch

From the first consultation to final brick, you'll get expert advice, quality workmanship, and a team you can trust.

Contact us now for a free quotation >

Planning Permissions & Building Regulations

Choosing a home extension company that understands planning requirements can make the process much easier. We’ll guide you through the legal side of your project, including planning permission, permitted development rights and building regulations.

You may not need planning permission if your extension:

Falls within permitted development limits
Is a single-storey rear build under 6m (detached) or 3m (semi-detached/terraced)
Doesn’t exceed 4m in height or use more than 50% of your garden
Is under 2 storeys and within height limits

Planning is required if your property is listed, in a conservation area, or your plans exceed permitted development.

All extensions must meet building regulations, which cover:

Structural integrity
Energy efficiency
Fire safety and ventilation
Plumbing and electrics

We ensure full compliance and handle the paperwork for you.

    
 
 
       Posted on Google  
   
   Stephen Benson 
 
 
 
 Trustindex verifies that the original source of the review is Google. Choosing Birch for our single-storey extension is the best decision we've ever taken in relation to our home. We spoke to several building companies and it was clear straight away that Birch were different. Their engagement with the project, even at that stage, was more careful, detailed and attentive than any of the others we met. That care and attention proved to the hallmark of their work throughout the build. Jake, Jack and Emma are simply great to work with. The process of the build was explained at every stage. Contact and communication was always quick and easy. Every aspect of the work - all the moving parts; all the different sub-contractors; all the decisions and revisions - was overseen with care. And the work itself is superb in every regard. The best way of putting it is to say that we felt totally safe trusting Birch with the project and with our home. We cannot recommend them highly enough.
  
 
      Posted on Google  
   
   Kate Jennison 
 
 
 
 Trustindex verifies that the original source of the review is Google. It's hard to put into words what Birch Construction has done for us. We talked to a number of contractors before we met Jake and it was clear to us that he was the contractor we should choose. Our project was a complete renovation of a difficult historic property. We started off with one budget and set of expectations and as can so often happen with older properties as soon as we dug in we found all sorts of unexpected problems. Birch Construction shone through the whole process. They came up with brilliant solutions, working with structural engineers and skilled tradesman and they have literally transformed our property into the amazing home it is today. In conjunction with their trades they have rewired, replastered , removed walls, replaced windows and added custom doors and floors, sanded and stained floor boards , replaced plumbing, bathrooms, the kitchen, wood stoves, built beautiful brick walls out of the bricks removed from the interior of the house, decorated, the list goes on The carpentry work in the house is a source of real joy to us and while I would like to claim credit for the vision of our  house's renovation actually alot of it belongs to Jake and his team at Birch. These guys know what to do and how to do it. They are known in our village as the guys who left no stone unturned... which I think says it all. I would not hesitate to recommend Birch Construction, they are skilled, nice, integral and committed.Thank you Jake, and thank you Birch. We are so grateful.
  
 
      Posted on Google  
   
   Michael Leviseur 
 
 
 
 Trustindex verifies that the original source of the review is Google. Jake and his team have been great from start to finish. They led us through our project with patience and clear explanations at every step. The quality of their workmanship is fantastic and they are tidy workers as well. Would I recommend them and use them again? 100% on both counts.
  
 
      Posted on Google  
   
   Dave Wilby 
 
 
 
 Trustindex verifies that the original source of the review is Google. We work well with Birch Construction and have collaborated on a wide range of projects from the small wall knock-throughs to loft conversation and extensions.
The service they provide from start to finish with their clients is of the highest quality, with clear scheduling and progress updates to keep the project on track and the process as stress-free as possible, along side the quality of their work in delivering the project.
Looking forward to working with them on future projects, and seeing them to continue to provide a 5-star service.
  
 
      Posted on Google  
   
   Zofia Jordan 
 
 
 
 Trustindex verifies that the original source of the review is Google. We started with just one project from Birch Construction and we are now up to number 4. Everything from raising roof heights to new bathrooms, new bedrooms and lots in between. The team must be good if we wouldn’t keep coming back for more.
  
 
      Posted on Google  
   
   Amelia Sharp 
 
 
 
 Trustindex verifies that the original source of the review is Google. I would highly recommend Birch Construction, having worked with them on the renovation of my home. Jack and his team really care about what they do which made it a pleasure to be able to collaborate on and organise the project. Their attention to detail makes all the difference and I couldn't be more thrilled with the finished result!
  
 
      Posted on Google  
   
   h p 
 
 
 
 Trustindex verifies that the original source of the review is Google. Having used Birch Construction for a kitchen extension, bathroom renovation and garden patio, we highly recommend them. They are a professional, super friendly, highly dynamic team who are client and quality focused. There was excellent communication throughout with great attention paid to what we wanted. The project  was completed to a high standard and on time.  We are very happy with the outcome and will definitely use them again. Thanks again to Jack, Jake and the rest of the Birch team!
  
 
      Posted on Google  
   
   Huggable Heroes 
 
 
 
 Trustindex verifies that the original source of the review is Google. We are over half way through a kitchen renovation being completed by Birch Construction. Jake has been incredibly helpful from the moment I contacted him regarding a quotation. From directing us to structural engineers to help us get the ball rolling to going above and beyond when our own electrician we insisted we must use let us down.
The whole team has been brilliant, currently the tiled floor is going down and kitchen will be fitted next week.
We really couldn’t be happier.
A tip for anyone thinking of using Birch Construction is use all of their recommended tradesmen. You won’t be disappointed.
  
 
      Posted on Google  
   
   Simon Underhill 
 
 
 
 Trustindex verifies that the original source of the review is Google. My family and I are absolutely over the moon with the whole team of Birch Construction! Their passion, commitment, work ethic, kindness and attention to detail is first class. The renovation of our house was a big project - gutting a Grade II+ listed house, breathing new life into a tired antique and creating a beautiful family home. Jack & Jake couldn’t have been more accommodating and supportive of the whole process. Nothing is too much trouble - they really care about their clients.

Extension Costs: What to Expect

Our pricing is clear and transparent, with no hidden fees. Your project cost will depend on:

Extension size, complexity, and structural needs
Materials (brick, timber, glass, render etc.)
Interior finishes — kitchens, bathrooms, flooring, lighting
Design and architectural fees
Planning and building control applications
Site access and groundwork

We’ll give you a full, itemised quote upfront so you always know exactly what to expect.

Areas We Cover

We build high-quality home extensions across Norfolk and surrounding areas. Whether you live in a quiet rural village or a thriving market town, our team brings expert craftsmanship and friendly service to your doorstep.

We regularly work in:

Norwich

Wymondham

Dereham

Attleborough

Heathersett

Long Stratton

Thetford

North Walsham

Diss

Costessey

Harleston

Swaffham

Aylsham

Taverham

Downham Market

Don’t see your area listed? Get in touch, we’re happy to travel throughout Norfolk for the right project.

Frequently Asked Questions

How long will my extension take?

Most single-storey builds take 10–14 weeks. Larger or double-storey extensions may take longer, depending on complexity and weather.

Will I need to move out?

Not usually. We’ll work in phases to minimise disruption and keep you informed throughout.

Do you help with planning permission?

Yes. We provide advice, handle submissions, and liaise with your local council if needed.

Can I use my own architect or designer?

Absolutely — we’re happy to collaborate with your team or recommend trusted local professionals we work with regularly.

Can I build an extension without planning permission?

In many cases, yes. We’ll assess your proposal and confirm whether it qualifies for permitted development.

Start your Home Extension with Birch Construction

If you’re considering a home extension in Norfolk, let’s bring your ideas to life. From first consultation to final brick, you’ll get expert advice, quality workmanship, and a team you can trust, including timber frame specialists who understand how to build smarter, faster, and with care.

01603 511550

Our office is open 9am-5pm Monday to Friday

[email protected]

Email us with a brief of your requirements and we'll be in touch to arrange a visit