We’re an architectural design and construction management company with a love of creative inspiration. We help turn dreams and visions into reality for people who aspire to live in exceptional contemporary spaces. Big ideas are our thing. Along with expertly costed build packages. Then there’s our end-to-end project management service, perfect for people who want to leave nothing to chance.

Our vision is to provide a happy, frustration-free building process for all involved; Clients, architects, building inspectors, and neighbours. We aim to provide a work environment that inspires trust, respect, collaboration and teamwork; an environment where everyone involved feels fulfilled and happy to participate.

We provide 1 point of contact throughout your building project from Design through Planning to Build. 

You can find out more about our recent projects and read our client testimonials on our website as well as independent sites such as MyBuilder, Houzz, Local Surveyors, TrustMark and Google. 

We are a checked and approved company by the UK highest construction standards - Safe contractor SSIP .We also carry the very prestigious 'BUILD ASSURED' Badge to guarantee total peace of mind to our clients. We were delighted to be chosen to represent the FMB in their current TV advert.

We use the latest estimating software to produce comprehensive and accurate estimates to guaranteed Satisfaction.

All our jobs are covered by our own personal 5 year warranty, plus they will be covered by the Consumer Protection Association Warranty for the same period. This gives you total peace of mind when dealing with Happy Building as it will cover any monies paid to us from the very beginning and any products and works carried out by us.

Trades offered

Commercial builder
Shop fitting
Structural steelwork
Builder general
General extension
Loft conversions
Garage conversions
House Builder
New build
Custom/Self Build

Case studies

5-bedroom house refurbishment

  • 01 Feb 2022
  • Cheam

Ground floor rear extension

  • 10 Aug 2021
  • Sutton

See more case studies

Customer testimonials

15 Dec 2017

Great team to work with. Valter has been very patient with us over a two year period and has helped us all the way with the design, plans and budgeting. It's never an easy process but he and his team have kept it as stress-free as possible. - Pippa


15 Dec 2017

We commissioned Happy Building to undertake the design of our proposed rear extension. Our requirements were not straightforward and yet Valter and his architect took everything on board and provided us with a range of options. Very professional, good fun to work with and, perhaps most importantly, they listened to what we wanted and also put forward their own ideas. We would thoroughly recommend them. - Richard


12 Oct 2017

The project involved relaying the drive, building a new front wall and installing electric gates and lights. Valter and Jenny from Happy Building were great. They kept me informed, discussed changes and were reasonable with their quote and the variations. They undertook the work efficiently and managed through the challenges as they arose. Will definitely use them again. - Ben

South London

07 Apr 2017

I wouldn’t hesitate to recommend Happy Building. My project was a two storey extension and complete refurbishment of a house that had barely been updated since the 1950’s. From our opening meeting we built up an excellent relationship with Valter and this continued through the entire build. The work started on time and over a six month project only ran a couple of weeks over the scheduled end date which is pretty impressive. We were lucky to have Brigen as our foreman – he’s hugely experienced and nothing was too much bother for him. I’d be lying if I said there weren’t ups and downs over the course of the build but that’s to be expected; the end result is fantastic and we’re so thrilled to now be living in our dream home. Thank you! - Graeme


15 Mar 2017

We contracted Happy Building to do a full house refurbishment, loft-conversion and extension. From the start, Valter, Beatriz and the team have been very helpful and understanding of our requirements. The first point contact is with Valter, the MD, which provides reassurance. In addition, he is always ready to answer queries, flexible to our needs and easy to talk to. Furthermore, they provide us with suggestions and recommendations to aid our decision-making. We have just completed the planning stage and are excited for the next steps. - Gratien


See more testimonials