Loft Conversions Across London

Turn unused attic space into beautiful bedrooms, home offices, or playrooms without extending your footprint. We specialise in dormer, mansard, and velux loft conversions. Most conversions don’t need planning permission and add significant value to your property.

London's Most Trusted Construction Partner

20+ Years Delivering Excellence

100+ London Projects Completed

7facebook.png Foundation and Finishing in Greater London
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 Loft Conversions

For over 22 years, Foundation and Finishing has been delivering exceptional Loft Conversions 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.

Adds a box-shaped dormer to the roof to maximise headroom and floor area, ideal for new bedrooms or ensuites
Reshapes the rear roof to a steep mansard form, creating an almost full extra storey that suits many period terraces.

Converts the loft using roof windows only, keeping external changes minimal while creating a bright extra room.

Extends a hipped roof into a full gable to unlock usable loft space in semis and detached homes.

Turns unused lofts into comfortable, fully compliant bedrooms that add real value and flexibility.

Adds a compact, well-detailed bathroom in the loft so the space becomes a private, self-contained suite.

Creates a quiet, service-ready workspace in the roof, with proper light, power, data and heating for home working

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

Most loft conversions fall under permitted development rights and don't need planning permission. We assess your property and advise during the free consultation.
Typical loft conversions take 6-8 weeks from start to completion. The work is contained to the loft area with minimal disruption to the rest of your home.
Most lofts can be converted if there's sufficient head height and roof structure allows it. We assess feasibility during your free consultation.
Everything from structural work and stairs through to plastering, electrics, heating, flooring, and decorating. We also handle building control certification.
No, families typically stay in their homes during loft conversions. Work is contained to the loft with access via scaffolding until stairs are installed.

Book Your FREE Home-Visit and Consultation