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House Extension Professionals in Harpenden, Hertfordshire

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Harpenden / 25 mi
Architects & Architectural Designers
House Extensions
1 – 15 of 1,575 professionals
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1,575 Professionals

Featured Reviews for House Extension Professionals in Harpenden, Hertfordshire

The Market Design & Build
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars19 October 2016
“The Market Design and Build has just finished a big project for us and we couldn’t be happier. The property is an old converted barn so the challenge was huge. Obviously there were some set backs but the communication in between us (property owners) and The Market was excellent so problems were solved quickly. These guys are not here to screw you over. Before signing the contract they guaranteed us that they wouldn’t leave the project until we were 100% happy.. And they didn’t! We are sure to use The Market again if we need more work done on a property in the future.”
Shinz Design Consultancy
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars26 July 2017
“Yihyi has helped our family on a couple of occasions, and both have gone so well that we intend to get her involved in a third project. We can't recommend her highly enough. She helped my brother turn a two bed one bath flat into a three bed two bath flat, creating a great family home from a small space, with flair and care - but without a huge budget. A couple of years later, she has helped me update my loft space and create a living and sleeping space that we absolutely love, and also reworked my bathroom, shower room and small toilet - all of which I love. If you get the chance to hire her - do it!”
NineTen Architects
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars11 June 2021
“NineTen Architects were excellent from start to finish on our project - a loft conversion to a bungalow, adding master bedroom with glazed end wall, ensuite bathroom and dressing area. There were also modifications to the Ground Floor, removing a wall and (obviously) adding a staircase. Jeremy and James visited us and talked through the potential of the space, helping us to understand what was and wasn't possible, down to the details and materials. NineTen were very good at communicating and sent us a number of sets of drawings for comment, taking on board our requests at each stage and revising the drawings all the way up to a detailed set suitable for the builder to use for construction. Overall, completely satisfied and happy with the service we got from NineTen Architects and would recommend them to anyone.”
Go Plans
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars31 December 2022
“Our experience with Go plans has been excellent. They arranged a home visit at very short notice, listened to our suggestions and compiled the initial drawings relatively quickly. They also successfully handled the whole planning permission process for us and provided a very fast and professional response to the requests and changes requested by the planning officer. We would definitely use them again for future work.”
Andreas Christodoulou Architectural Associates
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars7 July 2020
“We have worked with ACAA on refurbishment projects and garden designs in London for several clients. Andreas, Fabio and the team are very knowledgeable and always professional throughout. We would not hesitate to recommend them.”
Extension Plans UK
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars21 September 2023
“Very professional service giving us everything we needed at a fraction of the cost of getting an architect.”
Fabric Space
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars1 February 2018
“We have worked with Fabric Space on several projects and are so proud of the end result. They have interesting ideas, attention to detail and really care about their clients. If you'd like a practice that offers unique solutions then I would highly recommend Fabric Space.”
Building Tectonics Ltd
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars4 September 2015
“Our conservatory included a kitchen, dining room/lounge with no doors & a plastic roof so we were very cold in the winter. We contacted Building Tectonics who transformed our uncomfortable space into a very light garden room by taking the walls down between the kitchen & dining room/lounge & adding a proper roof. We now enjoy cooking, eating & relaxing in a great open space”
Marlin Design Ltd
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars21 October 2020
“Great service from Mark, i would highly recommend anyone considering getting professional drawings for your house extensions to use Marlin Designs, not only did they delivered on time but on budget, Mark was always on the other end of the telephone to answer any queries you may have. I found Mark to be very professional and easy to work with throughout the process, I would definitely recommend his services to anyone.”
Studio SB
House Extension Professionals in Harpenden, Hertfordshire
Average rating: 5 out of 5 stars22 May 2023
“Our family is totally new in London. We bought an interesting 3 bed flat, above 20/F, besides River Thames on one side and overlooking a dock on the other side. The flat is quite new and ready for living in. We however want to have better use of the space while maintaining or even highlighting the character of the flat, we decide to look for an experienced designer from various internet referral platforms. I notice that there are a lot of highly qualified interior designers and architects available out there. After over one month of selection process, we finally decided with confidence to go with SB Studio. We choose See Beng not only because of his impressive portfolio in architectural work and interior design but more importantly is his eagerness and patience to learn our expectation. We have gone thru one month of work together. It is very fulfilled experience. See Beng listens to us patiently to learn the details of our need. In the meantime, he would always provide ideas that we never think of. I can say it is a very harmonious cooperation experience. We contract SB Studio for design and project management. We have expectations of work quality, time control and budget control. See Beng’s resourceful connection in the field provide us more alternatives in terms of style and price. In order to meet time lines, See Beng would work for us during weekends or holidays, when really required. My wife and I are so happy that we have chosen See Beng as our interior designer and project manager.”
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Architect or Architectural Designer 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 Harpenden.

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 Architects & Architectural Designers on Houzz?
1,575Local Pros on Houzz Who Serve Harpenden, 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 Harpenden 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 Harpenden 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.

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