London’s Leading Loft Conversion Specialist

A pre-conversion London loft offers a pallet for your creativity and can be just the blank canvas needed to impact your living environment for added comfort and increased scale. It is not surprising that loft conversions are the most popular form of residential property conversion and with the relatively liberal planning permissions associated, obtaining a loft conversion is an excellent way of renovating your property. 4b Renovations has a strong background in successful loft conversions of all types and feature across South West & West London. With our architecture, structural engineering and construction expertise we are London loft conversion specialists of choice. With no third-party communications or sales involved, you can be assured that 4b Renovations will design drafts, obtain planning permission and build your loft conversion to the highest standards, using materials of the finest quality.

Mansard Loft conversions

Dormer Loft conversions

Hip to Gable Loft conversions

Velux Loft conversions


From day one our office team will always be available as is your Project Manager to advise you should you need it and are happy to help in any way they can. We do not contract our work out so you will see the same team every day.

A Building Inspector will visit at regular stages throughout the project, their job is to make sure that we are adhering to all the latest building regulations. Upon completion of works The Building Inspector will make a final visit and you will be issued with a completion certificate.

Upon completion of all works and having gained approval from The Building Inspector we will supply you with all relevant safety certificates.

Why our clients choose us?

Family Owned

With 20 years+ experience. Our team is highly experienced and dedicated with a total building experience in excess of 40 years.

In house experts

Builders, designers, project manager and full construction team all under one roof for an all inclusive on service.


A fast seamless planning, design and construction process with immediate start of project when you are ready

No Upfront Payment

You only start payments to us
once we are under way and
you are happy with the progress so far