House Extensions London

House Extensions in London Tailored to How You Live

Masterful Strategies: Choosing the Best House Extension Builders in London – S&M Solutions Ltd, Design and Build Contractors London

A house extension in London is more than just extra space — it’s a chance to create a home that truly fits your lifestyle. Whether you’re opening up the kitchen, adding a bedroom, or creating a dedicated home office, the right extension can transform how you live every day.

At S & M Solutions Ltd, we design and build high-quality house extensions across London. From planning and permissions to design and construction, our experienced team handles it all—ensuring your new space blends beautifully with your existing home and adds lasting value.

Tailored to Your Home, Built to Last

Every extension project starts with understanding your goals. Do you need more natural light? Do you want to open up the rear of the house for entertaining? Or are you planning a two-storey extension to accommodate a growing family? Whatever your vision, we work closely with you to deliver results that are functional, stylish, and built for the long term. 

Stay in the Area You Love

Enjoy the comfort of your current neighbourhood while upgrading your home.

Tailored to Your Life

Extensions are fully customised to suit your family’s needs, taste, and routine.

Strong Return on Investment

High-quality extensions add real value and market appeal to your property.

More Cost-Effective Than Buying Bigger

Save on stamp duty, moving costs, and fees while gaining the space you need.

Looking for a full transformation? Combine your extension with a renovation for even greater impact.

Design and Build Services in Blackheath – S&M Solutions Ltd, Design and Build Contractors London

Popular House Extensions in London

Rear Extensions

Side Infill Extensions

Wrap-Around Extensions

  • Combine side and rear expansion for large, bright, open-plan areas
  • Ideal for modern living and entertaining
  • Greatly increases both space and value

Multi-Storey Extensions

  • Add an upper floor for new bedrooms, an office, or an en-suite master
  • Requires planning but offers substantial extra space
  • Excellent for growing families

Over-Structure Extensions

  • Build above garages or previous extensions
  • Ideal for limited plots with restricted garden space
  • Adds value without reducing outdoor area
What £150k Gets You in a London Home Renovation in 2025 – S&M Solutions Ltd, Design and Build Contractors London

Project costs vary based on size, materials, and complexity, but here’s a general guide:

  • Standard Single-Storey Extensions – from £60,000–£80,000
  • Mid-Range (Wrap-Around, Multi-Storey) – from £80,000–£150,000
  • High-End Extensions – from £150,000+ for bespoke features and premium finishes

We provide clear, personalised estimates based on your brief.

Will my extension match the existing house?
Absolutely. Our designers ensure each extension complements your home’s architecture, style, and materials.

How long will it take?
Most extensions are completed within 12–16 weeks, depending on scope and planning requirements.

Will I need planning permission?
Many extensions fall under permitted development, but if permission is needed, we handle the entire process for you.

About Our Process

1.

Inquiry

We swiftly respond to your building requirements upon your contact, gathering essential information such as your project vision, timelines, and specific needs. This initial step is crucial as it helps tailor our approach to address your unique building needs from the outset.

2.

Consultation - Estimate

We offer a detailed consultation—whether in person or by phone—to discuss design, budget, and challenges. Our experts then assess the site and provide a transparent estimate, ensuring clear communication and a strong partnership.

3.

Project Kick-off & Progress

Once the contract is signed, we promptly begin the project, arriving fully prepared to bring your vision to life. With an online monitoring portal and biweekly meetings, we keep you updated, address any concerns, and ensure everything stays on track.

4.

Completion & Aftercare

Upon project completion, we conduct a final walkthrough with you to ensure every detail meets your standards, followed by providing comprehensive aftercare instructions and support for any post-completion needs. Our commitment extends beyond the build, ensuring that you are delighted and well-supported even after the project is finished.

Why Homeowners Choose S & M Solutions Ltd

Butterfly roof kitchen extension in London E1
Home extension and renovation project in London by S & M Solutions Ltd
Home extension and renovation project in London by S & M Solutions Ltd

From single-storey extensions to multi-level expansions, we deliver carefully planned, high-quality work that enhances how you live.

  • Extension Specialists with deep knowledge of London homes and planning requirements
  • Seamless Architectural Integration – We blend new and existing elements effortlessly
  • Luxury Finishes – Premium materials, bespoke interiors, and expert craftsmanship
  • Clear Costs & Timelines – No surprises—just well-managed projects that run on schedule

Testimonials

We love our customers! Here is what they had to say about us.

Get in Touch

Let’s Build Your Ideal Space

A well-executed house extension adds more than just square footage—it adds lifestyle, comfort, and long-term value. Whether you’re growing your family or future-proofing your home, we’re here to make it happen with expertise and care.

Fill in the form below to start your extension project with S & M Solutions Ltd.

Areas We Cover

We provide premium house extension services across Central & Southeast London — including Chelsea, Fulham, Kensington, Westminster, Dulwich, Greenwich, Maze Hill and Blackheath. From rear and side-return extensions to full-width open-plan transformations, our design & build team delivers high-end results tailored to the character of each neighbourhood.

S & M Solutions Ltd – House Extension Specialists serving Chelsea, Fulham, Kensington, Westminster, Dulwich, Greenwich and Blackheath
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