Dormer Loft Conversions Across London

For over 22 years, Foundation and Finishing has been delivering Dormer Loft Conversions across Greater London. We add box-shaped dormers to maximise headroom and floor space, turning unused lofts into spacious, practical rooms.

London's Most Trusted Construction Partner

20+ Years Delivering Excellence

100+ London Projects Completed

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Our Services

Professional Building Services in Dormer Loft Conversions

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

Dormer loft conversions are the most popular way to unlock the potential of your roof space. By projecting a box-shaped structure from the existing roof slope, dormers create full-height ceilings and significantly larger floor areas than simple Velux-only conversions. Rear dormers in particular often fall under permitted development, making them a relatively straightforward route to adding bedrooms, en-suites, or home offices.

We start by assessing your existing roof, head height, and structure to confirm feasibility. Our team then designs a dormer layout that makes efficient use of space, staircase positioning, and natural light. We handle structural engineering, building control, and all aspects of construction, including floor strengthening, dormer framing, roof coverings, insulation, windows, plumbing, electrics, and finishes. The result is a comfortable, bright room that feels like a natural part of your home rather than an afterthought.

Maximum Loft Space

Maximises usable floor area and headroom in the loft through the box-shaped dormer form.

Ideal New Rooms

Perfect for creating new bedrooms, en-suites, or flexible multi-use rooms.

Planning-Friendly in Many Cases

Rear dormers often fall within permitted development, speeding up approvals.

Cost-Effective Alternative to Moving

Typically more economical than moving to a larger home to gain extra space.

Strong Value Increase

Adds significant value to your property by increasing bedroom count and overall floor area.

Uses Wasted Space

Makes productive use of loft areas that were previously only suitable for storage.

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

Rear dormers often fall within permitted development, but this depends on volume limits and previous alterations. We check your specific case and advise.

As a guide, at least 2.2m to the underside of the ridge is usually required. We measure accurately and confirm feasibility during the survey.

We design dormers to suit the proportions and style of your property, using appropriate materials and alignments to keep them as discreet as possible.

Yes, en-suites are very common. We design plumbing, drainage, and ventilation to work efficiently within the loft.

Most dormer loft conversions take around 6–8 weeks on site, depending on complexity and weather.

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