Glass Extensions Across London

For over 22 years, Foundation and Finishing has been delivering contemporary Glass Extensions across Greater London. We create light-filled spaces with modern glazing that connect your home and garden beautifully.

London's Most Trusted Construction Partner

20+ Years Delivering Excellence

100+ London Projects Completed

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Based on 56 Reviews
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Based on 82 Reviews
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Based on 108 Reviews

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Our Services

Professional Building Services in Glass Extensions

For over 22 years, Foundation and Finishing has been delivering exceptional Glass Extensions services across Greater London. Whether you're adding space with a side return, creating an open-plan kitchen-diner, or building a double-storey addition, we handle every detail from planning permission to final completion.

Glass extensions use expanses of glazing to create bright, contemporary spaces that feel connected to the outdoors all year round. Whether you want a sleek dining area off the kitchen, a glazed living space, or a modern replacement for a dated conservatory, we design structures that are both visually striking and thermally efficient. We balance glass with solid elements, shading, and ventilation so your extension is comfortable in both summer and winter.

We work with high-performance glazing, slimline frames, and carefully detailed junctions to achieve a clean, modern look. Structural considerations are key; we coordinate steelwork and roof support so the glass feels as open as possible without compromising safety. As with all our projects, we handle planning, building control, and full construction, delivering a space that looks impressive from the garden and feels exceptional from the inside.

Light-Filled Spaces

Maximises natural light and garden views, making interiors feel bright and uplifting.

Contemporary Look

Creates a modern, high-end feel that can completely refresh the appearance of your home.

Year-Round Comfort

Uses high-performance glazing and detailing so the space is comfortable in all seasons.

Brings Light to Dark Areas

Can transform previously dark internal rooms into bright, usable spaces.

Strong Market Appeal

Increases property value and buyer interest thanks to striking design and better usability.

Garden Focal Point

Often becomes a strong visual feature when viewed from the garden and surrounding spaces.

Why Families Choose Us

20+ Years, Results
That Speak for
Themselves

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

You Decide Everything, We Handle Everything

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

Group 2661 Foundation and Finishing in Greater London

Work That Actually Gets Done On Time

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

Same Team From Quote to Completion

We work with the same qualified tradespeople on every job. Gas engineers, electricians, builders, finishers. They know our standards and they deliver. One point of contact for you, zero coordination headaches.

Honest Communication

We give you realistic timelines and pricing up front. If we discover something unexpected during the work, you know immediately. No hiding problems until it's too late.

Group 2661 Foundation and Finishing in Greater London

20+ Years, Results
That Speak for
Themselves

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

You Decide Everything, We Handle Everything

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

Same Team From Quote to Completion

We work with the same qualified tradespeople on every job. Gas engineers, electricians, builders, finishers. They know our standards and they deliver. One point of contact for you, zero coordination headaches.

Honest Communication

We give you realistic timelines and pricing up front. If we discover something unexpected during the work, you know immediately. No hiding problems until it's too late.

Work That Actually Gets Done On Time

Over 100 London families trusted us with their biggest investment. The kind of work that makes homeowners call us back for their next property.

icon Trusted Construction Services
icon Quality Craftsmanship & Reliability
icon Strong Foundations, Lasting Results
icon Professional & Committed Team
icon Trusted Construction Services
icon Quality Craftsmanship & Reliability
icon Strong Foundations, Lasting Results
icon Professional & Committed Team

Our Process

Simple. Straightforward. No Surprises.

Here’s exactly how we handle every project, from start to finish.

Get In Touch

Here's exactly how we handle every project, from start to finish.

We Listen & Advise

We measure everything, talk through your vision, and tell you what will actually work in your space.

Clear Quote

Fixed price. Fixed timeline. No surprises halfway through your project.

We Build It

Same team from day one to completion. Weekly progress photos. Direct line to Fares whenever you need answers.

Frequently Asked Questions

We use modern, thermally efficient glass, insulation, and heating solutions, and can incorporate shading where needed, to keep the space comfortable all year.
It depends on size, position, and your property type. Some projects fall under permitted development; others require planning consent. We advise on the correct route.
Yes. A modern glass addition can complement period homes beautifully if proportions, materials, and junctions are considered carefully.
Glass does need cleaning, but good access design and self-cleaning coatings can make maintenance easier. We discuss maintenance at the design stage.
Often yes, with the right structural support. We design steelwork and openings so the transition feels as open as safely possible.

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