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Design and Build Companies in Welwyn, Hertfordshire

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Welwyn / 25 mi
Design & Build
1 – 15 of 1,499 professionals
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1,499 Professionals

Featured Reviews for Design and Build Companies in Welwyn, Hertfordshire

TMDB - House Of Clarence
Design and Build Companies in Welwyn, Hertfordshire
Average rating: 5 out of 5 stars1 October 2026
“Excellent architectural & planning service. We used TMDB for the architectural and planning of our prohect including a loft conversion, 6 meter extension and outbuilding. Peter and james were excellent throughout professional and clear in explainning the process. The drawings were completed quickly and they made tye planning process straightforward and easy to understand. Our applications were submitted under Permitted development. We initially faced a refusal relating to the 6 metre rear extension following neighbour objections but Peter, James and the TMDB team guided us throughthe next steps and put together a strong case to address the planning issues. In the end, they successfully managed to get the full 6 metre extension approved, which we were very pleased with. Communication on the planning side was good, and overall we were very happy with how the architectural and planning application was handled. We would happily recommend them for architectural drawings,planning applications and residential projects.”
Homeconcepts
Design and Build Companies in Welwyn, Hertfordshire
Average rating: 5 out of 5 stars16 September 2026
“We really appreciated how clearly Homeconcepts guided us through the extension and renovations to our house in Hampstead. They explained things in a way that actually made sense, helped us understand what to expect in the the next step. Whenever we had questions, they answered them calmly and honestly, which made everything feel far less stressful. The work was excellent, but what stayed with us most was how supported and informed we felt from start to finish. We also liked them always being on hand for hanging paintings too...we promise only two more...we just have to find them, big thanks to Danny, Ash and Konrad for amazing work.”
Plus Rooms
Design and Build Companies in Welwyn, Hertfordshire
Average rating: 5 out of 5 stars6 November 2023
“So building work is fraught with fear, worry, anxiety and stress, but from the get go Plus Rooms impressed us by being able to calm our nerves. From the initial visual plans in our first meeting, to comprehensive schedules, detailed kick off meetings and weekly site visits. The building team became like Rockstars in the house and were amazing with our young kids, as we decided to live in when doing it. Did we have problems we had to overcome, of course, what build doesn't - but it felt like a true partnership and they were always quick to respond. We also finished bang on time. Plus Rooms were slightly more expensive than others, but because they could give us such clarity from the get go and would project manage the whole thing, that's why we went with them and i'm glad we did.”
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Design and Build Company FAQs
In short, a design and build company consists of all stages of the construction process, from design to build, in one place. A design-build firm works under one contract with the project owner to complete both design and build steps of the project.

They will take on the responsibility of planning the project, drawing up the designs, costing, sourcing the building materials and supplies, building the structure, installing any permanent features and possibly advising on the interior design of your home; all while consulting you every step of the way.
Speed and cost. Hiring a design & build company for your Welwyn project means that the whole process from start to finish will be quicker, as all stages of the project will be handled by one company. This also saves time finding additional companies to complete certain stages of the project and potential back & forth between builders and designers to discuss the plans.

By using a design and build company in Welwyn for your project, you will also be given an all-in-one quote for the design and construction of your project. This is often cheaper than hiring separate professionals for each step of your project.
You can find a local design-build company in Welwyn with Houzz in two ways:

  • Answer a few questions about your project to get matched with a local professional for free. Enter your postcode above to get started.
  • Browse through our list of the best design-build companies in Welwyn where you can find their profiles, reviews and photos of past work.

    • After choosing either option, you can reach out to the design-build professionals you want to discuss your project. You can request and compare quotes before hiring the right design and build company for you.
    There are 1,499 Design-Build professionals, registered on Houzz in Welwyn.
    Why Hire Design & Build on Houzz?
    1,499Local Pros on Houzz Who Serve Welwyn, Hertfordshire
    95,000+Total Number of Reviews Left by Homeowners
    Planning a renovation project or building your own home can mean involving a lot of different companies, contractors and professionals, making everything a bit of a struggle to stay on top of. One way to cut out a couple of middlemen is to use Welwyn design and build companies to build and design a house or a few rooms; handling your project from design and planning right through to construction. Hiring a design and build firm in Welwyn will make it so much easier if you plan to build your own house from scratch as they can work with you through every step of the process, without having to switch from architect, to designer, to builder, to stylist and back again. Design and build contracts have become more and more common as homeowners look to find more efficient ways of building custom homes, and you can find a whole list of design and build contractors in Welwyn near you right here on Houzz if you’d like to find out more about hiring a design and build company.