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Loft conversions

Loft Conversions

The Loft Conversion London team are the best Loft Conversion Specialists in the industry. Loft Conversions in London are the solution for growing families and people looking to add quick and easy space to their properties. A Loft Conversion can be completed within just a few weeks



The House Extension London Team are excellent at creating all types of Extensions. Single or Double Storey, Side Return and the latest designer Glass Extensions are built within weeks. Kitchens, Living areas and Entertainment areas are some of the most popular types of House Extensions

Basement Conversions


The Basement Conversion London Team are specialists in Converting Basements in London. Basement Conversions are now very popular within London recently. A London Basement Conversion can be a new self contained flat a gym a cinema room or an addition of many new rooms to the property


Samantha Shaw. SW18 – Earlsfield 

I got the number for Builders GB from my father who had his Loft Converted by them back in 1987. I am a little cautious when it comes to spending a lot of money with a company that is not recommended by somebody I know because of a couple of bad experiences.

Builders GB carried out a Double Side Extension and converted my garage into a Office/Study. At the same time I got them to knock through my living room wall to join it up with the dining room.

The quality of work was very good and the price was also reasonable. They took around 8 weeks to finish the house and did not leave a mess.

They have Architects working for them full time who come on site every other day to check that everything is carried out to a good standard and make sure that all building codes are met.

I will be using the services of Builders GB again in the near future as I want them to make a garden house for me. Seeing as I have used their services, I’m sure that I will get a discount. 


Mr and Mrs Peterson. SW13 Barnes

Builders GB is an excellent Building Company. Our new House Extension and Loft Conversion were completed to a an excellent finish. We were kept fully up to date at all times and we saved a few thousand pounds by using the free Decorating, Architecture and Structural Calculations offer.

The design process allowed us to make changes until we were satisfied with the layouts, their Architects are very helpful. Builders GB is very popular in our area and are highly recommended London Builders who are well priced, tidy and quick.


Mr J Williams. SW15 – Putney

I run a property developing business based in Putney for the past 17 years. The only company I have ever used is Builders GB. Why? They always do an extremely good job and are very reasonably priced. They are able turn projects around quickly.

Builders GB have built many Loft Conversions and House Extensions for us over the years. The work is guaranteed for ten years, so some peace of mind. So far I have had no problems at all with them apart from being made to wait for a booking as they do get busy sometimes.

They are simply very good London Builders.


Call us on – 0207 205 4222 or email us for more information –


Mr D Kellet. W13 – Ealing

By far the best priced construction company. They came in a full 10% below our lowest price quoted for our new Attic Room. They finished the job in under 6 weeks and left our house tidy.

They spent the last day on the job cleaning and detailing our new structure. They are busy with a few properties in my area.  Highly recommended.


Mr and Mrs Hawkins. KT2 – Kingston upon Thames

A very good company. We are extremely happy with the level of service and attention to detail received on our house alterations.

They have a large team of professionals who are excellent at their individual trades. The job was finished within the period set and did not go a day over.
We’ve built a two bedroom loft room together with a large side return extension. The price was fantastic and the work is finished to a very good standard which makes the house look and feel brand new.


Eve Hollingsworth. W4 – Chiswick

Thanks to Builders GB I now have 3 extra bedrooms and 2 more bathrooms. They are very popular in my area and have carried out many conversions in my locality. It’s a fast and friendly company and pretty good value for money.

I called them round for an estimate on the work and they provided a good price and included many extras for free. I had a total of five quotations but all the other companies were around a few thousand pounds more in price and they all had hidden costs. Builders GB were very clear about what they had included in the price and they didn’t charge me anything for guaranteeing the work.

Quick Links

Builders GB

Call us on

0207 205 4222



 Builders GB London. 65 Grosvenor Street. London. W1K 3JH. United Kingdom