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Bespoke Construction Services

At SLL Building Co., we specialize in transforming homes through bespoke luxury construction that reflects your individual style and vision. With uncompromising craftsmanship and fully tailored solutions, we deliver exceptional quality that elevates living spaces across London and beyond.

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City And Guilds
Federation of Master Builders
Trustmark Government Endorsed Quality

We turn your vision into reality with expert craftsmanship, precision, and creativity. From renovations to conversions, we ensure a seamless, stress-free experience with exceptional attention to detail at every stage.

0208 087 1923

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Side, Rear & Wraparound

Enhance your home with a tailored extension that adds space and style. Whether side, rear, or wraparound, we design seamless additions that elevate how you live and feel at home.

Entire Home Renovations

Transform your home with a custom renovation that blends comfort, functionality, and modern style. We focus on every detail to create a space that reflects your lifestyle and personal taste.

Living Space Upgrades

Reimagine your living areas with bespoke enhancements that reflect your lifestyle. From layout improvements to design finishes, we create inviting, high-quality spaces you'll love.

Basement Construction

Maximise your home's potential with a basement build designed around you. Whether it’s a guest suite, home office, or entertainment space, we deliver seamless, high-end results.

Loft Conversions

Unlock new space and value with a beautifully crafted loft conversion. Our team works closely with you to create a bright, functional extension that feels like a natural part of your home.

Garden Rooms

Add flexible space with a beautifully designed garden room. Ideal for home offices, studios, or relaxing retreats, each build is custom-crafted to blend with your lifestyle and landscape.

Why Choose Us

Construction site visitor

40 Years Experience

Rely on our seasoned expertise. Your vision, our commitment - a legacy built on precision and satisfaction.


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7 Days a Week

We’re here when you need us, offering flexible and reliable service every day of the week.


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Reliable & Credible


Trust in our reputation for delivering exceptional results, every time.​​


Free Quotes & Consultations

No pressure, just expert advice. Get a free quote and consultation to start your project with confidence.
 

Workers in Building Site

Wraparound Extension – Sarah L.

(Wimbledon, London)​​​

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We had a wraparound extension done on our Victorian semi, and we couldn’t be happier with the result. From planning permission to final finishes, everything was handled professionally and on time. The team was tidy, polite, and always communicative. Our kitchen and dining space are now bright, open, and exactly what we imagined. Highly recommend for anyone considering a home extension.

HMO Conversion – James K. (Croydon)

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I hired a team for a full HMO conversion of a 5-bedroom house, and they delivered beyond expectations. They handled the project end-to-end — fire regulations, soundproofing, en-suites, and even the planning with the council. What impressed me most was their understanding of compliance and investment returns. The work was high quality and completed within budget. As a landlord, finding a reliable team like this is gold.

Basement, Loft & Rear Extension – Priya D. (Dulwich Village, South London)

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We undertook a major renovation — basement dig, loft conversion, rear extension, and a full-house refurb. A huge project! The project manager kept everything on track and transparent. We lived off-site during the work, but they sent regular updates and even helped with finishes selection. The craftsmanship is excellent, and the house feels brand new but still full of character. We’ve had so many compliments.

Client Feedback



We take pride in delivering top-tier property maintenance services to clients throughout London.




 

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