skip to main content
Photos
Photos
Advice
Stories From Houzz
Houzz Discussions
Houzz Research
Sign In
Houzz Logo Print

House Extension Professionals in Welwyn Garden City, Hertfordshire

Expand your living space with a well-designed extension, custom built to meet your needs and preferences

Get Matched with Local Professionals
Answer a few questions and we’ll put you in touch with pros who can help.

Location (1)

Nearby Locations

Popular Locations

All Filters
Welwyn Garden City / 25 mi
Design & Build
House Extensions
1 – 15 of 1,090 professionals
1234567816Next Page
1,090 Professionals

Featured Reviews for House Extension Professionals in Welwyn Garden City, Hertfordshire

NOVATE | ACS LTD
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars18 August 2020
“Our professional relationship has grown into a friendship. When our project ran into a problem, Frank resolved it with the Council with intelligence, creativity, and urgency, which is the basis upon awarding him 5 stars. Visitors to our home are struck by how thoughtful the architecture has resolved old and new, and how the quality of space created is expansive. The whole has been crafted to retain the integrity of the original building cloaked in a refreshed result which underpins our enjoyment of our home, and gives us confidence that the investment is truly valuable.”
Build Team
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars6 July 2017
“Build Team have just completed the design phase of my kitchen side return extension project and we have planning permission. I'm very happy with my final plans and the whole process. My designer was very professional, courteous and helpful. He kept me informed throughout the process, gave good advice and listened to my ideas and concerns.”
Build Abode
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars18 February 2019
“The most efficient and friendly staff, highly professional team that can execute your kitchen dreams and desires to an exact specification! The expertise that the team had from the inception with the detailed drawings with great design ideas and 3D visuals created by Sonya, and the level of detail from the installation manager Avtar who was on site during the process and the complete knowledge of every aspect of a kitchen from appliances, accessories, colour schemes and materials and the utilization of space from the directors Ajit and Sukh gave us clear confidence in their work and passion for the job and service provided. They were extremely personable, warm, friendly and charming and a complete joy to have been serviced by. The finished product has been complimented by every guest and is now clearly the highlight of our home. Would highly recommend to anyone looking for a great quality kitchen with fantastic service to go with it! Our family thank you Design Abode for realising our dream kitchen. One happy customer!”
Better Homes Studio
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars25 January 2020
“We hired CELLI Property Care for our loft conversion, and I can honestly say that they were just more then we expected. It was our first time doing something this big to our house so we needed someone with experience that knew exactly what would go into a project like this. They did a fantastic job at walking us through every part of the project and they guaranteed that they will keep us in the loop throughout the whole process. The guys were really hardworking, tidy and polite. They would clean at the end of each working day, and they did everything possible not to disturb us. The price wasn't the cheapest of all the quotes we've received, but Celino was by far the most knowledgeable and patient estimator that came to visit us. Overall we are very happy with the job and we would recommend CELLI Property Care to anyone looking to hire a responsible, fair and hardworking contractor. Emma Hughes”
Insight Architects and Designers Ltd
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars25 January 2017
“Having been initially impressed by Nick's work on his own home, my first contact with him was some years ago when he designed a loft conversion for me at a previous address. I therefore had no hesitation in asking him to design and help oversee the work at my new house in 2016, which involved expanding a shower room in a loft conversion within its existing planning remit and re-modelling the downstairs living area. In the loft, he successfully doubled the size of my shower room. In the living area, one of the drawbacks was that the house is mid-terrace Edwardian and it can be quite dark. Nick specialises in maximising light and he used glass in a way that has transformed the property while still retaining the character of the original building. I was also struggling for storage space and he was able to create much more which, while unobtrusive, more than meets my needs. Nick's is straightforward and friendly to deal with and I'd certainly recommend him.”
We Love Build
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars29 October 2019
“Very happy with Three Arches team. A great quality loft conversion completed on time and to a high standard. Really good communication so any queries were quickly answered. Three Arches were very professional and reliable throughout the project so overall very pleased and would highly recommend to anyone”
SAR Interiors Ltd.
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars12 January 2015
“We recently had an extension and commissioned Sarah from Whitehouse Interiors to help us plan the space internally, making it work for us as a family and also the design of the kitchen. Sarah's understanding of the brief was excellent and we are so pleased with the end result. Sarah has great creativity, styling and is easy to work with. I would definitely recommend Whitehouse Interiors as our kitchen would not look like this without them. Great service and worth every penny.”
Conova Construction
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars7 February 2021
“The Falci Construction team are professional, efficient, friendly and pro-active. Overall quality in terms of finish and approach is excellent”
Mel Massey Studio
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars13 July 2018
“Mel designed a 'lounge-inspired' retail space and office for my shoe company, and did a wonderful job sourcing quirky and unusual pieces of furniture and artwork, as well as creating a solution that worked perfectly for my high end customers and staff. The result was absolutely outstanding, and attracted significant press coverage and a real 'wow' factor within the industry. I wouldn't hesitate to work with Mel again - she's a genius!”
Progressive Design London
House Extension Professionals in Welwyn Garden City, Hertfordshire
Average rating: 5 out of 5 stars19 November 2013
“Marius and his team are not only professional and hard-working but also unusually sensitive and attentive to the requirements of the customer. We had very little experience of dealing with builders and were rather apprehensive at the start of the process but were soon completely reassured. They have a real can-do attitude and kept surprising us with their blend of practical and creative solutions to issues that arose. I couldn't recommend them more strongly.”
1234567816Next Page
List your business here for free - Learn More
Design and Build Company FAQs
A house extension is a construction process that involves expanding the footprint of your existing home. This could be extending outwards, either to the side or rear of the house, or upwards by adding another storey. House extensions provide extra living space and can significantly increase the value of your property.

House extensions can be categorised based on direction, structure and function. The main types include rear extensions, side return extensions, wrap-around extensions, and double or single-storey extensions. More specific ones could be kitchen extensions, loft conversions, basement conversions, garage conversions or conservatories. Select the type that best suits your property and meets your space needs, if you are unsure, speaking with a local home extension builder in Welwyn Garden City.

Generally, house extensions are worth the investment. They provide additional living space and can dramatically increase the resale value of your home, often covering the initial investment cost. However, plan carefully and choose a reputable house extension builder to ensure a high-quality build that will add value to your property.

The cost of a house extension can vary significantly based on several factors, such as the size, complexity of the design, quality of materials used, and geographical location. However, as a rough estimate, a single-storey extension can range from £1,000 to £2,000 per square metre, whereas a two-storey extension can start at around £1,500 per square metre.

Planning a house extension involves several stages, including idea generation, design, planning permission, and construction. Consult with a house extension architect to create a design based on your needs and budget. Ensure to check with your local council about planning permissions. Finally, choose a reputable house extension builder to bring your vision to life.
Why Hire Design & Build on Houzz?
1,090Local Pros on Houzz Who Serve Welwyn Garden City, Hertfordshire
95,000+Total Number of Reviews Left by Homeowners
Are you considering a house extension? On Houzz, you can find an extensive selection of Welwyn Garden City house extension professionals near you, eager to turn your vision into a reality. Whether you're planning an extra bedroom, expanding your kitchen or designing a brand-new workspace, these professionals have the skills and expertise to make your project successful. House extension professionals include architects who can draw up detailed plans and builders who will execute them to the finest standards.

Choosing a house extension professional on Houzz ensures peace of mind, knowing that you’re in safe hands. They come highly recommended with a strong track record of creating bespoke, high-quality extensions in Welwyn Garden City in a wide range of styles and budgets. Whether planning a new kitchen extension, adding a new storey, or just wanting more living space, find your house extension solution with us.

United Kingdom
Tailor my experience with cookies

Houzz uses cookies and similar technologies to personalise my experience, serve me relevant content, and improve Houzz products and services. By clicking ‘Accept’ I agree to this, as further described in the Houzz Cookie Policy. I can reject non-essential cookies by clicking ‘Manage Preferences’.