Extensions

At Lion and Leinster, we specialise in expertly built house extensions that enhance your home’s space, functionality and value. Whether you’re planning a single-storey rear extension, a wraparound kitchen extension, or a double-storey addition, our team works closely with you to bring your vision to life—on time and on budget.

Why Choose a House Extension?

An extension is a smart way to create more room without the upheaval of moving house. You can expand your kitchen, add a new bedroom or bathroom, or even create a stylish open-plan living area to suit your lifestyle.

With over 20 years of experience in South London and Surrey, we understand local planning requirements, and we’ll guide you through every stage of the project—from initial design and obtaining permissions, to construction and final finishes.

Skilled Craftsmanship

Custom-Tailored Designs

Premium-Grade Materials

Our Services Include:

  • Rear, Side, and Wraparound Extensions

  • Single and Double Storey Extensions

  • Kitchen and Open-Plan Living Extensions

  • Planning Advice and Architectural Drawings

  • Building Control and Regulations Compliance

  • Full Project Management from Start to Finish

Built Around You

Every home is different, and so is every client. That’s why we take the time to understand your needs and create a bespoke solution that works for your property and budget. We work with trusted architects, structural engineers and suppliers to deliver high-quality results with minimal disruption.

We use only experienced tradespeople and high-grade materials to ensure a finish that blends seamlessly with your existing home—whether you’re after a traditional brick extension or a contemporary glazed design.

Get Started

Thinking of extending your home? We offer free, no-obligation site visits to discuss your ideas and

provide a detailed quotation.


Call us today on 020 8226 0292 or email

[email protected]

to arrange a consultation.

Structural Modifications:

From removing walls to adding extensions, we handle structural changes seamlessly.

Bespoke Joinery:

Custom cabinetry, shelving, and storage solutions tailored to your space and style.

Plumbing and Electrical Work:

Upgrading or installing systems to meet modern standards and your specific needs.

Painting and Decorating:

Professional finishes to give your property the perfect look.

Flooring and Tiling:

Wide-ranging options, including hardwood, laminate, and premium tiling solutions.

Gallery of Our Work

Turn Your Garage Into a Functional Living Space!

Find out all you need to know about transforming your garage into a practical living space, boosting your property value by up to 20%. Understand the process, steer clear of common mistakes, and discover why Lion and Leinster are the trusted choice for garage conversions.

Call us now to book your FREE site visit & garage assessment: 020 8226 0292.

Thinking of Converting Your Garage

Phone: 020 8226 0292

Registered Office Address: 90 Weald Rd, Sevenoaks, Kent, TN13 1QQ

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