Loft Conversions

At Bloom Builders, we design and construct bespoke loft conversions across London, with a strong focus on period properties across South West London. We transform underused roof spaces into high quality bedrooms, home offices and living areas while ensuring structural integrity and long term building performance.

We deliver both full design and build loft conversion projects and construction only packages depending on project stage and client requirements.

Why Choose a Loft Conversion?

Space Efficiency
Creates additional living space without reducing garden area.

Property Value
Well designed loft conversions can significantly increase resale value.

Design Flexibility
Suitable for bedrooms, home offices, bathrooms and multi use spaces.

Cost Efficiency
Typically faster and more cost effective than ground floor extensions.

Types of Loft Conversions

Dormer Loft Conversions
Adds head height and usable floor area and suits most London properties.

Mansard Loft Conversions
Creates maximum internal volume but often requires planning approval.

Hip to Gable Loft Conversions
Extends roof volume on semi detached and end terrace properties.

Rooflight (Velux) Loft Conversions
Lower cost option that works within existing roof structure.

L Shaped Dormer Loft Conversions
Combines two dormers to create large additional floor space.

Loft Conversion Cost London

Costs vary depending on structure, roof form, specification and access constraints.

Typical London ranges:

Rooflight Loft Conversion
£25,000 to £35,000

Dormer Loft Conversion
£40,000 to £55,000

Hip to Gable Conversion
£50,000 to £65,000

Mansard Conversion
£60,000 to £80,000+

L Shaped Dormer Conversion
£45,000 to £75,000

We provide early stage cost advice to improve budget certainty and reduce construction risk.

Loft Conversion Planning London

Many loft conversions fall within permitted development rights, but planning permission may be required for:

Properties in conservation areas
Flats and maisonettes
Larger volume roof alterations

We advise on planning strategy and coordinate approvals where required.

Small Loft Conversion Ideas

Even smaller lofts can be transformed into practical spaces including:

• Home offices
• Guest bedrooms
• Children’s rooms or playrooms
• Reading and quiet spaces

Careful layout design, storage integration and natural light planning are key to successful small loft conversions.

Loft Conversion Projects

We have delivered loft conversions and structural roof alterations across South West London including:

Huron Road SW17
Full house renovation including roof space conversion and internal reconfiguration.

Montholme Road
Structural renovation with extension works and internal reconfiguration.

Rodenhurst Road
Structural extension and internal layout improvements.

Why Work With Bloom Builders?

Clear Cost Planning
Transparent pricing and structured construction cost advice.

Full Project Coordination
From feasibility and structural design coordination through to construction completion.

Design and Build Understanding
We understand how design decisions affect structure, cost and construction programme.

Start Your Loft Conversion Project

If you are considering a loft conversion in London, we can advise on feasibility, cost and construction approach.

Contact Bloom Builders to discuss your project or request a loft conversion cost estimate.