Luxury House Extensions in London

Write Your Home’s Next Chapter

Don't let limited space compromise your vision. At SM London Construction, we specialise in home extensions that not only add square footage but also elevate your property's design and enhance its overall luxury.

Whether you dream of a sleek, modern house extension, a traditional layout, or a blend of styles, our team will bring your vision to life. We ensure your new house extension seamlessly integrates with your existing home, using high-quality materials and the latest construction techniques to combine beauty and functionality.

The result is a stunning, cohesive home extension that feels like an original part of your property, providing the extra space and refined design touches you've always wanted.

Book a consultation online or call us on 07961 817 505 or 0208 226 5511, and begin your journey to a transformed home today.

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Start-to-End Service.

10-Year Structural Warranty.

Accredited Team.

Endless Design Possibilities

Whether you need more space for your growing family or want to add luxury features like a home cinema or spa, we can design and build the perfect addition.

Choose from single-story, double-story, wraparound, or side extensions to match your home's unique footprint. Our experienced architects and designers will work closely with you to bring your vision to life, translating your style preferences into tasteful, functional realities. Traditional or modern, rustic or sleek - if you can dream it, we can build it.

Don't fret if you don’t have a concrete vision in mind. During a complimentary consultation at your home, we'll assess your space, discuss ideas that fit your lifestyle, and transform your wishlist into a custom plan tailored to you. With our bespoke approach, the possibilities are endless.

Browse our gallery for a look at the stunning results we’re able to achieve.

Our Gallery

By Your Side, Every Step of the Way

We handle every aspect of your project, from initial consultations where we make sure your needs are fully met, to managing the construction process with minimal disruption. You’ll work with the same dedicated team throughout, guaranteeing a smooth and seamless progression with no risk of miscommunication.

Beyond our design and build service, we offer comprehensive support at every stage. From guiding you through property planning guidelines in your borough to answering any questions about the build, we're always ready to make sure you have the information you need.

Click below to learn more about the process of partnering with us.

Our Process

Home Extensions FAQs

The cost of your extension will depend on the size, design, and finishes you choose. During our consultation, we’ll give you a clear and detailed quote that breaks down all the costs at each stage, so everything is transparent. We'll always strive to work within your budget while making sure you get the best possible results.

You can stay in your home in many cases, especially with single-story or rear extensions, but it really depends on the work involved and what you’re comfortable with. We’ll discuss this during the planning stage and do our best to minimise disruption wherever possible.

Look through our gallery to view the transformations we've achieved for our clients, or explore our portfolio for an in-depth, step-by-step overview of some of our completed projects. We can also get you in touch with our previous clients who are happy to show you around the place.

The timeline for a home extension depends on the size and complexity of the project, but it typically takes around 8 to 16 weeks from the start of construction. We’ll work closely with you during the planning phase to create a detailed schedule, so you know exactly what to expect at each stage and can follow along as the project progresses.

Not necessarily. Many home extensions, especially smaller ones like single-story rear or side extensions, fall under Permitted Development Rights and don’t require planning permission. However, larger projects like double-story or wraparound extensions often do. As part of our service, we’ll provide expert advice and guide you through the planning process to make everything as stress-free as possible.

Yes. Whether you have a modern home or a more traditional one, our team will carefully select materials and finishes to make sure your extension complements your current architecture. We can also design striking contrasts if you prefer a more contemporary style.

As much or as little as you’d like! We can handle all the design work for you, from concept to materials and final finishes, or we can follow your existing designs. Either way, we’ll work with you throughout the process to make sure the extension perfectly reflects your vision and needs.

Yes, all our home extensions come with a 10-year structural warranty to give you peace of mind. We're dedicated to delivering premium craftsmanship, and this warranty guarantees your extension is protected for the long term.

You can get started by booking a free, no-obligation consultation with our team. We’ll discuss your ideas, survey your property, and offer guidance on what’s possible. We can then start designing your custom extension, along with providing a detailed quote and timeline to keep everything on track.

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Client Testimonials

Discover what our previous clients had to say about their experience working with us.

The team did a great job at building the rear extension as per our building specs. Gagan was our on site lead every day and was very professional, polite and friendly. And his team worked well together to get the build completed quickly.

House Extensions

We choose SM Construction to complete our first family home project (Rear extension) and we highly recommend them to others. Shaz and his builders worked in such a professional timely manner, ensuring we was kept posted in every step of the project. Any challenges that they faced they dealt with efficiently and cost effectively. Shaz and his builders craftsmanship and finishes of the job is what makes them stand out, making sure it was exactly to are needs and wishes. Shaz honest and transparent approach as a builder allowed us to promptly feel like our home was in trusted hands.

Home Extensions

Renovations

Loft Conversions

our projects

Book Your In-Home Design Consultation

If you’re ready to elevate your home to a new level of sophistication, talk to the design experts at SM London Construction today.
During your complimentary in-home consultation, we'll get to know your property and the vision you have for it. We’ll make sure we have a strong understanding of what you’re hoping to achieve, so we can begin the planning stage and start making your dream home a reality.
Book your no-obligation design consultation online, call 07961 817 505 or 0208 226 5511, and let’s get started.