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Accurate Costs for your Self Build Project or Home Extension

We provide professional construction estimating services to private clients, self-builders, property developers, small builders, sub-contractors, principle contractors, Architects and mortgage lenders. Projects range from small garage conversions to new build blocks of 15 apartments. We can provide an estimating solution to meet any requirement.

We are trained Quantity Surveyors and Chartered Construction Managers with over 25 years of experience and speak with our industry contacts daily to ensure all rates are up to date. Our meticulous mindset will make sure that everything has been accounted for. 

If you are looking for a turnkey solution, we can also offer planning drawings, submission of planning permission, construction drawings, tendering and procurement of building contractors, and a building contract service. 

Our Home Extension Cost Estimate calculator gives a realistic idea of how much you can expect to spend to achieve the extra space you want in your home. It is an essential first step if you are planning on adding more space to improve your living environment. Our professional advice and judgement comes highly recommended. 

Why choose us?

Reliable Pricing - Never go over budget when your budget is right from the start.

"Outstanding Service with an Excellent Reputation" – When asked 100% of our customer said, they would use our service again, and many do week in week out.

Value for Money – No expensive fees we provide fast, reliable building estimates at prices you can afford and with clients regularly coming back for repeat business this only reinforces our promise.


What our clients say about us

"Always a fast response, always a fixed price so we know where we stand, and the professional presentation is second to none and very easy for our customers to understand. I only wish they could work for us full time."

Daniel Hanley, Director, Top level Construction Limited, West Sussex.

"I converted my garage into a games room for my 3 boys. B7 did everything the estimate planning and the drawings. They even recommend a builder and the project was completed within 4 weeks. I have recommended them to all the mums at the school gates who want similar work done. An excellent very personable service."

Tara D, Private Client, Surrey.

''I have worked with Ed at B7 for the last 6 years. He is focussed hard working and always delivers. His great communication skills and attention to detail continually stand out plus he always makes himself available. Eastwell Ironworks will continue to collaborate with B7 now and in the future.''

Leigh Smallwood, Director, Eastwell Ironworks, Kent.

"A professional service who know how to price jobs but more importantly understand exactly how things are built a hybrid quantity surveyor / builder. What more could you want? I highly recommend Ed and his team and hope to enjoy our business relationship for the foreseeable future."

Geoff Chance, Director, Your Space Design & Build Limited, London.

"When I get overwhelmed with estimating jobs B7 are my plan B. They pick up the overflow and always deliver keeping my clients happy and my reputation intact, ensuring I never have to turn anyone down. Keep up the good work. "

Ben Sharp, Director, BE Sharp Commercial Services Limited, London.

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