About Us

At the Ratio Design & Build, we are committed to providing quality workmanship on every project we are involved in. 

We will deliver a transparent service that is built around your vision, aims and objectives.

We A Multi-Award Winning Construction Company

Who are we ?

After 20+ years of experience in the construction industry, we have identified a problem with the construction trade in London. When speaking with clients, we found that they have experienced or are wary of the same issues every single time.

Builders have created a for not delivering on promises, hiding or uplifting fees, poor workmanship and not turning up at all!

Our mission is to disrupt this reputation by delivering our version of what home renovation should be.

We work with our ratio of a 100% commitment in four key areas:


From clear costings and quotes, to showing you exactly which products we use in our work before we begin the project. Your dedicated project manager is always on hand to explain every part of your journey with us.

Quality Workmanship

We use high quality materials regardless of project size. Our builders, architects and support team attend rigorous and regular training days to ensure The Ratio’s commitments to standards and customer care are met.

Clear Project Delivery

We understand that each home or property we are involved in is a big part of you and your family’s life. We will give you clear milestones from quote to completion and your dedicated project manager will work with you to ensure these milestones work around your life.


We are 100% committed to the quality of our workmanship that we give a 10 year guarantee on all of our projects. If any situation arises whereby our work has not met your expectations after the project has finished we will arrange a time to come and resolve any issues at no cost to you.


Our team are committed to upholding The Ratio’s mission towards quality and care.

Support Team
Gas Engineer
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The Building Process

We follow a simple but effective step-by-step process to help you plan your build around you. 

We follow this regardless of whether you are extending, building, or converting your home or property.


Free Consultation


Project Scope Quotation


Contractual Agreement


Planning & Preparation


The Work Begins


Work Completion


Aftercare & Follow-up

Successfully Renovated over 250+ Homes

"Highly recommend these guys as they gave us the dream house that we wanted."

Andrew Brown

"Use this company a few times for different jobs. Always got the job done on time and very professional!"

Nayim Mahomade

"The Ratio Design and Build team have given us a beautiful new kitchen and garden, with a professional, sleek and high-quality finish. Their attention to detail and workmanship throughout the project has been excellent, with immaculate skill and expertise. We are incredibly happy with the end result and would highly recommend this team for both large and smaller projects."

Roxane Feerick

"Best quality builds in London by far, professional service, I recommend them for anyone looking to fit a new bathroom or kitchen."

Oskar Kennedy

"Excellent quality work with great customer service, providing expert advice and very accommodating to changes and ad-hoc requests from our side."

Sheryl Smith

Investing in Property

Investing in your property is a huge step. We have found that each project we have completed its has added value to our clients life whether that through adding value to the property of simply keeping the children happy with a new play space!

We have found some statistics you might like to know:


Added value for Loft Conversions

Loft conversions can increase the value ofyour property by a great 20%.

According to On The Market


Added value for Extensions

A medium sized extension can add approximately £59,000 to the value of your home.

According to Homes & Property


Renovating your Kitchen

Renovating your kitchen can increase the value of your property by approximately 8.3%.

According to Express Property


Contact us now for a bespoke non-obligation quote.