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House Extensions London – Expert Builders for Quality Home Extensions

house extensions in London

Expanding your living space is one of the smartest ways to enhance both comfort and property value, especially in a city like London where space is at a premium. At Brit Home Design & Build, we specialise in high-quality house extensions in London, delivering tailored solutions that perfectly match your lifestyle and property style. Whether you’re considering a rear extension, side return extension, wrap-around extension, kitchen extension, or a double storey addition, our expert team ensures a seamless transformation from concept to completion.

With years of experience in residential construction across London, we understand local planning regulations, architectural styles, and the importance of maximising space efficiently. Our skilled builders, designers, and project managers work closely with you to create functional, stylish, and durable extensions that add real value to your home.

From modern open-plan kitchens to spacious family living areas, we focus on quality craftsmanship, attention to detail, and delivering projects on time and within budget. If you’re looking for reliable house extension builders in London, we’re here to turn your vision into reality.

House Extension Services in London

At Brit Home Design & Build, we offer a comprehensive range of house extension services in London, designed to suit different property types, budgets, and lifestyle needs. Whether you want to expand your kitchen, create additional living space, or completely transform your home layout, our expert team delivers customised solutions with precision and care.

Rear House Extensions

Rear house extensions are one of the most popular choices among London homeowners. They allow you to extend into your garden space, creating larger kitchens, dining areas, or open-plan living spaces filled with natural light.

Side Return Extensions

Ideal for Victorian and terraced homes in London, side return extensions make use of unused alley space to significantly increase your ground floor area without sacrificing much outdoor space.

Wrap Around Extensions

A combination of rear and side return extensions, wrap around extensions provide maximum space and flexibility. They are perfect for creating spacious, modern open-plan layouts.

Kitchen Extensions

Transform your kitchen into the heart of your home with a bespoke kitchen extension. We design functional and stylish spaces that are perfect for cooking, dining, and entertaining.

Double Storey Extensions

Double storey extensions are ideal for homeowners looking to add both ground floor space and additional bedrooms or bathrooms upstairs, increasing overall property value.

Single Storey Extensions

A cost-effective way to enhance your home, single storey extensions are perfect for expanding kitchens, living rooms, or creating new multifunctional spaces.

Start Your Project With Confidence

Planning a  loft conversion? Our experienced team at Brit Home Design & Build provides professional design and construction services across London and surrounding areas.

From the initial concept to the final build, we manage every stage of your project with precision, transparency, and quality craftsmanship.

✔ Free consultation and expert advice
✔ Over 25 years of construction experience
✔ Fully managed design & build service
✔ High-quality materials and skilled workmanship

Why Choose Our House Extension Builders in London

Choosing the right house extension builders in London can make all the difference to the success of your project. At Brit Home Design & Build, we combine experience, quality craftsmanship, and a customer-focused approach to deliver exceptional results tailored to your needs.

  • Experienced Professionals
    With years of experience in house extensions across London, our team understands the complexities of residential construction, ensuring every project is handled with expertise.
  • Design & Build Service
    We offer a complete end-to-end solution, from initial design concepts and planning to construction and final finishing, making the entire process smooth and stress-free.
  • Local Knowledge & Compliance
    Our in-depth understanding of London planning regulations and building standards ensures your project meets all legal requirements without delays.
  • Tailored Solutions
    Every home is unique, and we create bespoke extension designs that match your property style, space requirements, and budget.
  • High-Quality Craftsmanship
    We use premium materials and skilled workmanship to deliver durable, stylish, and long-lasting house extensions.
  • Transparent Pricing
    No hidden costs—just clear, competitive quotes so you know exactly what to expect.
  • On-Time Project Delivery
    We value your time and ensure projects are completed within agreed timelines without compromising on quality.

Our House Extension Process

At Brit Home Design & Build, we follow a streamlined and transparent house extension process to ensure every project in London is delivered efficiently, on time, and to the highest standards. From initial consultation to final handover, we keep you informed at every stage.

1. Initial Consultation

We begin by understanding your requirements, ideas, and budget. Our team visits your property in London to assess the space and discuss the best extension options tailored to your needs.

2. Design & Planning

Our expert designers create detailed architectural plans that maximise space, functionality, and aesthetics. We work closely with you to refine the design until it perfectly matches your vision.

3. Planning Permission & Approvals

If your house extension requires planning permission, we handle the entire process on your behalf. Our knowledge of London regulations ensures a smooth approval process with minimal delays.

4. Construction & Project Management

Once approvals are in place, our skilled builders begin construction. A dedicated project manager oversees every stage, ensuring quality workmanship, safety, and timely progress.

5. Final Handover

After completion, we carry out thorough quality checks and walk you through your newly extended space to ensure everything meets your expectations.

House Extension Cost in London

The cost of a house extension in London can vary depending on several factors, including the size, type, design complexity, and materials used. On average, homeowners can expect to invest anywhere between £1,500 to £3,000 per square metre, depending on the specifications and finishes.

For example, a single storey extension may cost less compared to a double storey or wrap-around extension, which involves more structural work and planning. Similarly, premium materials, bespoke designs, and high-end finishes can increase the overall budget.

Factors Affecting House Extension Costs

  • Size and Scale of the Extension
    Larger extensions require more materials, labour, and time, increasing the overall cost.
  • Type of Extension
    Rear, side return, wrap-around, and double storey extensions all have different cost implications.
  • Design Complexity
    Custom designs, structural changes, and open-plan layouts may require additional engineering work.
  • Materials and Finishes
    The choice of materials, fixtures, and interior finishes can significantly impact the final cost.
  • Planning Permission & Regulations
    Some projects may require planning approvals, building regulations compliance, and structural assessments.

At Brit Home Design & Build, we provide transparent and competitive pricing tailored to your specific requirements. Our team works closely with you to deliver cost-effective solutions without compromising on quality.

Planning Permission for House Extensions in London

Understanding planning permission is a crucial part of any house extension project in London. Depending on the size and type of your extension, you may not always need full planning permission, as some projects fall under permitted development rights. However, larger or more complex extensions—such as double storey or wrap-around extensions—often require formal approval from your local council.

At Brit Home Design & Build, we guide you through the entire planning process, ensuring your project complies with all London building regulations and legal requirements. Our team prepares and submits all necessary documents, including architectural drawings and supporting reports, to help secure approvals efficiently.

When Do You Need Planning Permission?

  • If your extension exceeds permitted development limits
  • For properties in conservation areas or listed buildings
  • When significantly altering the structure or appearance of your home

Permitted Development Explained

Many single storey rear and side extensions in London can be built without full planning permission, provided they meet specific size and design criteria. This can save both time and costs.

With our local expertise, we ensure your house extension project runs smoothly without unnecessary delays or complications, giving you complete peace of mind from start to finish.


 

Areas We Cover in London

At Brit Home Design & Build, we provide professional house extension services across all areas of London. Our local experience allows us to understand different property styles, planning regulations, and client requirements in each region.

We cover:

  • North London
  • South London
  • East London
  • West London

No matter where your property is located, our team is ready to deliver high-quality house extensions tailored to your needs.

FAQ's

How much does a house extension cost in London?

The cost typically ranges between £1,500 to £3,000 per square metre, depending on the size, design, and materials used.

Do I need planning permission for a house extension?

Not always. Many extensions fall under permitted development, but larger or more complex projects may require approval.

How long does a house extension take?

Most house extensions in London take between 8 to 16 weeks, depending on the scope and complexity of the project.

What is the best type of house extension?

It depends on your property and goals. Rear and side return extensions are popular for maximising space in London homes.

Can I live in my house during the extension?

In many cases, yes. However, for larger projects, temporary relocation may be more convenient.

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