S.T Contracts Ltd is a Watford-based, family-operated building company specialising in residential construction, renovation and conversion services. Since 2009, we have supported homeowners throughout St Albans and the wider Hertfordshire area with projects that demand precision, reliability and a professional approach. By keeping all trades in-house, we retain full control over quality, scheduling and on-site standards, removing the uncertainty often associated with subcontracted work. Our accreditations with recognised trade bodies reflect our commitment to best practice, transparency and long-term client confidence.
We undertake a wide range of building works, including loft conversions, house extensions, garage conversions and custom-built garden rooms. Each service is designed to maximise existing space and enhance everyday living without unnecessary disruption. From the outset, we provide clear documentation, realistic timelines and visual designs to help clients understand the finished result before construction begins. Our team remains consistent throughout the project, delivering a full handover and detailed snagging review on completion. Fully insured and locally knowledgeable, we combine technical expertise with a straightforward, client-focused service that prioritises quality outcomes and lasting value.
We undertake a wide range of building works, including loft conversions, house extensions, garage conversions and custom-built garden rooms. Each service is designed to maximise existing space and enhance everyday living without unnecessary disruption. From the outset, we provide clear documentation, realistic timelines and visual designs to help clients understand the finished result before construction begins. Our team remains consistent throughout the project, delivering a full handover and detailed snagging review on completion. Fully insured and locally knowledgeable, we combine technical expertise with a straightforward, client-focused service that prioritises quality outcomes and lasting value.
Served areas
- St Albans, Radlett, Harpenden, Watford, Borehamwood, Bushey, Rickmansworth, Hemel Hempstead, Aldenham, Abbots Langley, Kings Langley, Potters Bar, Chorleywood, Berkhamsted, Hatfield
Details
- Year established: 2009
- Licensed
- Insured
Highlights and features
- Family-run Watford builders delivering renovations and conversions since 2009.
- All trades in-house, ensuring consistent quality and accountability.
- Garden rooms built bespoke, insulated, with electrics and plumbing.
- Free 3D designs provided before work starts.
- Clear written contracts, fully insured, DBS-checked staff.
- Six-month guarantee and full snagging walkthrough included.
Payment methods
- Bank transfers
Services
We build garden rooms from scratch to meet your exact brief, producing fully insulated, weather-tight spaces designed for long-term use. Our team oversees groundwork, construction and the final fit-out, including plastering, decoration and flooring. Where required, we install electrics, plumbing and heating, and we guide you through planning considerations while keeping costs clear and honest.
We deliver bespoke home renovations, managing projects of all sizes with care and precision. As a family-run business with over two decades of experience, we undertake everything from single-room updates to complete property transformations. Our team provides a fully managed service, combining skilled workmanship with clear communication throughout every stage of the build.
We deliver professional building services supported by 24 years of industry experience. Our team manages projects from initial planning through to completion, ensuring regulatory compliance and consistent quality. We undertake extensions, conversions, renovations and new builds, providing a reliable, well-organised service that produces durable results and a straightforward construction experience.
Our bespoke house extension service is designed to simplify the building process while maintaining high construction standards. We oversee design, planning assistance and on-site works through a single managed programme. Backed by long-standing experience, we deliver fully compliant extensions with dependable workmanship and thorough project supervision throughout.
We offer a tailored approach to garage conversions, creating practical rooms that enhance everyday living. Backed by long-standing experience in the building trade, we take responsibility for the entire build process. All conversions are completed to meet building regulations, with careful construction methods ensuring reliable, lasting results.
We offer a complete solar panel installation service, covering both residential and commercial properties. Our experienced, MCS accredited team manages surveying, system design and installation with attention to detail throughout. Clients benefit from compliant systems, optional battery integration and a structured process delivered to professional standards.
Reviews (6)
Tommy Floyd
Nov 17, 2024
Report
ST Contracts recently installed solar panels and built a bespoke garden room for us, and we’re absolutely delighted with the outcome. The team was professional, knowledgeable, and always kept us informed throughout the process. The solar panels have already started reducing our energy bills, and the garden room is now our favourite space – beautifully designed and finished to the highest standard. Their attention to detail and commitment to quality really stood out. We highly recommend ST Contracts for anyone looking for reliable, top-quality workmanship.
Ally Sampson
Sep 09, 2024
Report
We are very happy with our garage conversion. We got a quick and fair quote and the work started quickly. They have been very professional, with good communication throughout, kept everything clean and tidy and completed the work in a very timely manner. We are extremely pleased with the end result and would highly recommend S.T Contracts.
Fran Barnett
Sep 02, 2024
Report
Stuart and his team put bi fold doors in my house, also converted a garage into a room. Absolutely excellent work, while the building was going on everything was kept neat and tidy. Brilliant team, nothing was too much trouble and everything was completed to the highest standard.
My friends have also had Stuart and his team in and are all as happy and so pleased with all building work.
I would highly recommend this company, the absolute best.
My friends have also had Stuart and his team in and are all as happy and so pleased with all building work.
I would highly recommend this company, the absolute best.
Alison Vale-Harris
Aug 16, 2024
Report
It is a pleasure to leave a testimonial for S.T. Contracts Ltd after recently using them for substantial renovations in our home.
We have not had renovations on this scale before and not sure what to expect. The work started during a particularly unforeseen stressful family situation and Stuart and his team were respectful and helpful not to add to the situation.
From the start Stuart was great at suggesting ideas for the project and put us in contact with various professionals we would need for the project to go ahead. He and his team worked to put our ideas to fruition and kept us up to date all the way through. Communication was good and we knew what to expect.
All of the crew and subcontractors that he used were friendly, respectful, and did their jobs efficiently and well. At the end of the day they would clear up and make the disruption that much easier to manage. Some went above and beyond our expectations in helping us.
As issues came up that we had not accounted for he discussed them with us and together they were resolved. Flexibility for us and Stuart’s teams was great at adapting to the unforeseen issues.
They arrived and finished on time every day and we were informed on which days the contractors would be available.
We are delighted with the quality of the attention they put into the work. The outcome exceeds all of our expectations and we will use them again for further projects.
We wouldn’t hesitate in recommending S.T. Contracts.
We have not had renovations on this scale before and not sure what to expect. The work started during a particularly unforeseen stressful family situation and Stuart and his team were respectful and helpful not to add to the situation.
From the start Stuart was great at suggesting ideas for the project and put us in contact with various professionals we would need for the project to go ahead. He and his team worked to put our ideas to fruition and kept us up to date all the way through. Communication was good and we knew what to expect.
All of the crew and subcontractors that he used were friendly, respectful, and did their jobs efficiently and well. At the end of the day they would clear up and make the disruption that much easier to manage. Some went above and beyond our expectations in helping us.
As issues came up that we had not accounted for he discussed them with us and together they were resolved. Flexibility for us and Stuart’s teams was great at adapting to the unforeseen issues.
They arrived and finished on time every day and we were informed on which days the contractors would be available.
We are delighted with the quality of the attention they put into the work. The outcome exceeds all of our expectations and we will use them again for further projects.
We wouldn’t hesitate in recommending S.T. Contracts.
Rebecca Sharp
Aug 07, 2024
Report
Aimee Vaughan
May 25, 2024
Report