Welcome to Grand Alliance

Grand Alliance is an established full-service building company that rebuilds, renovates, and improves domestic and commercial properties across London.

Domestic and Commercial Building Contractors, London

Grand Alliance is an experienced and reliable building contractor specialising in domestic and commercial construction and refurbishment projects. Our trusted team of professionals consistently aims to provide a high-quality finish, on time and within budget.

Multi-Trade Contractor Under One Roof

We are an all-trades contractor – our expert team includes joiners, bricklayers, plasters, roofers, painters, decorators, ground workers and more.
We take on all size projects across domestic and commercial sectors, from individual house builds and home extensions to large scale commercial and industrial builds. For commercial, private or public concerns Grand Alliance has a strong reputation as a company that excels in altering, converting and refurbishing existing properties.

Domestic Builders

Are you looking to utilise or increase the space within your home or refurbish a tired-looking property? Grand Alliance, can cater to all domestic building needs. Take a look at the variety of services we offer and let us help transform your vision into a reality. Read more

Commercial Builders

We undertake building projects for developers, main contractor projects, homeowners, property agents and commercial landlords across multiple sectors in London and surrounding areas. Grand Alliance offers a wide range of commercial building services you can rely on. Read More

More About Us

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our services

our provided services

Building, Refurbishment and Home Improvements

At Grand Alliance, we can shoulder the hard work when it comes to your property refurbishment and renovations.

Working closely with architects and designers the London based team can take care of the whole project from start to finish. We source materials, sub-contractors, utilise our expert tradesmen and manage the whole schedule to ensure the project is delivered on time to budget and specification.

Perhaps you’re looking to create some extra space with a house extension, loft or garage conversion? Maybe you’ve found your ideal home but need some help with renovation or refurbishing Grand Alliance excel in altering, converting and refurbishing existing properties.

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Kitchen & Bathroom Installations

Grand Alliance is an established and trusted building contractor based in London offering bespoke design and build services, refurbishments and complete kitchen and bathroom installations for residential properties. All of our building work is undertaken by a fully qualified team of experienced tradesmen.

Whatever your taste, from traditional styles to an ultra-modern look, we have you covered and can deliver the kitchen of your dreams. Get in touch today to see how we can help with your next kitchen or bathroom project.

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House Extensions London

Our highly skilled builders can complete all aspects of house extension projects across the whole of London.

We can design suitable home extensions that will provide you with added space you need to expand, whether it is new family arrivals or a home office. Extensions give you an option to create the home you need without having to move.

Virtually anything is possible thanks to the latest assortment of modern-day building materials available and our experienced design/build team.

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Client showcase

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  • Commercial
  • Residential

Why Choose Us?

Design and Build

Our highly skilled and dedicated team will make sure your project is taken care of from start to finish, with no hassle.


A quick and seamless planning, design and construction process, we have a multi-talented team to cover all building aspects under one roof.

We Deliver Quality

We have built a solid reputation for excellent service and high-quality workmanship that has helped us to become one of the go-to building companies in London.


Our Google Reviews

Very reliable company which offers a wide range of services at competitive prices, and has friendly and professional staff

Honie Duncan

3 August 2021

Had my whole flat refurbished through this company, fantastic workmanship, quality and timing, would highly recommend!

QPark Geo Map

3 August 2021

I have employed Grand Alliance company for full refurbishment and side extension of my house and quality of work was very good and financially I was very satisfied!!!

Angelo Won

3 August 2021

5 Star

Rihards Super

3 August 2021

Very nice people, happy to do business with them.

Hussain Ashmere

3 August 2021

They renovated our bathroom. Very good service, professional and high-quality. Would recommend.

Jess C

3 August 2021

Alex and his team are absolutely fantastic and did a great job with our commercial extension. The team were very accomdating and ensured the business was not affected in the build. Highly recommended for a project managed build.

Shamir Parmar

3 August 2021

I've had the pleasure of working with Alex at Grand Alliance for several years now. We have always found Alex and his team to be hardworking, reliable and well priced. The team have decorated our Fitzrovia office several times, completed 8 bathroom refits to an incredible standard, recommended great carpet fitters to us and helped with general repairs. We would highly recommend them!

Alexandra Raven

3 August 2021

Alex has a wonderful team who are very professional. The work is neat and nice.

Segun ade

3 August 2021

Alex and his team come highly recommended. Installed new kitchen and bathroom with internal remodelling. Very professional attitude and project planning, respected my home and didn't treat it like a building site. Above all reasonably priced for the high quality of work they do.

Quincy Chuka

3 August 2021

This is very good company.

Petr Shebarshin

26 July 2021

Alex & his team did a terrific job on fitting my new kitchen. I was so impressed with them that I also gave them the work to replace all the old decking in our back garden. Again, they didn't disappoint. I wouldn't hesitate to recommend them!!

Linda Veitch

26 July 2021

I could not recommend Alex and his team enough. He transformed my run down, almost derelict business property to an amazing, modern and stylish salon. The Pamper Suite, Bexley. He did this project in 2013 and it still looks amazing. Built to last. If I have ever wanted to change anything, he and his team have been available to assist me. I will never use another company. Grand Alliance LTD are the best. Thank you Alex.

Tracy Gibbons

26 July 2021

We have used Grand Alliance on three different occasions. To do our loft extension, en-suite bathroom and kitchen refurbishment. We have always found their work to be of a high standard and high quality. The company is reliable and punctual. I would thoroughly recommend.

Sally Cole

26 July 2021

Really professional team, delivered exactly the results they promised in the timeline they stated and on budget. It’s hard to find good contractors / builders that deliver to exacting standards. I highly recommend without reservation, need I say more.

Stuart Maclean

26 July 2021