Home Extensions

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

At Birch Construction, we design and build bespoke home 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 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 on two floors without expanding your home’s footprint. These extensions are ideal for growing families and those looking to add long-term value to their property. Using timber frame techniques, we can reduce overall build time 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

We’ll guide you through the legal side, 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.

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

info@birchconstructionltd.co.uk

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