

Customer Care
We love our customers, we take great pride in client care and satisfaction.


Home Improvements London
Bathroom installations, plumbing, heating, tiling and alterations. Contact us today for details.


Bespoke Home Design
Stunning bespoke services, from kitchen design, home improvements and extensions.
Building better homes in London and the Home Counties specialising in house extensions, conversions and renovations.
We are a Hertfordshire building company based near St Albans and Welwyn Garden City, offering a comprehensive building service specialising in home extensions, loft conversions and house renovations. Our service extends to a range of clients from domestic, residential and commercial. Each job is undertaken with the utmost professionalism and we ensure that we exceed the expectations of every client. With our meticulous approach to each service, we will not complete a job until we know that our clients are entirely satisfied with our service.
In addition, we offer a comprehensive carpentry service whereby we can provide you with a range of internal alterations and structural roof carpentry. This service similarly applies to all clients, domestic or commercial and we hold all the qualifications that allow us to undertake any construction work.
Offering a full range of guarantees and insurances to all of our customers on any of the projects completed by our company.
Carpentry & Building Services in London We guarantee a professional service to each and every customer..
Each job is undertaken with the utmost professionalism and we ensure that we exceed the expectations of every client.
CONTACT USMore Projects
We built to your requirements with a high level of attention to detail.
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Bi-Folding Doors
Door installation & Design Hertfordshire
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Extension Design
Extension installation and design
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Property Development
Property development services in Hertfordshire
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Door Installations
Door fitting services in Hertfordshire
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Bay Windows
Bay window design and installs Hertfordshire
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Timber Frames
Timber frame building design and installations
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Home Design
Home designers in Hertfordshire
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Kitchen Installation
Kitchen design and installations Hertfordshire
What Our Clients Say About Us
Some of the kind comments our clients say about us!

“We selected SAS Building and Carpentry to quote for our kitchen refit, small building works and utility room as we were confident that we would obtain value for money, whilst having the reassurance that this company would not compromise on quality or service as it is both Trust Mark and FMB accredited. We were pleased that the work could be scheduled to suit our programme and that it was completed on time by the Easter holidays deadline we had set. The building work, floor and wall tiling, carpentry and joinery was executed to an exacting, most professional, diligent and conscientious standard. We were especially pleased that the end result was better than we had seen in the many designer kitchen brochures and showrooms we had viewed but was delivered at a value for money and affordable price. We would not hesitate in highly recommending this company to other potential customers.”

“I contracted with Scott Smith to undertake our loft conversation project and I must say it was the best decision I had made. He is extremely good at his work and keeps to deadlines and most importantly to the budget. He has been extremely helpful throughout the project and was willing to make compromises to complete the project. I wish him all the best in the future and look forward to working with him in other projects.”

“Having made the decision to have an extension,the scariest bit was choosing a builder I choose SAS for the build and it was the best decision I could have made. Scott provided me with a fully costed estimate which we amended and agreed together. He and his team were polite, helpful and friendly and worked extremely hard. They cleaned and tidied up every evening and were a pleasure to have on the job. He even managed to build an entire extension without us having to have a skip in the road, which was brilliant as the house is mid terrace with no off street parking. Only one completely unforeseen problem, which he managed to overcome without a drama. I cant praise him enough and have recommended him to several people who were looking for a proper craftsman who is a perfectionist.”