Extension Builders in Hertford

Name: Extension Builder
Brand: MyBuilder
SKU: extension-builder
Rating: 4 (17 reviews)

Easily find verified Hertford Extension Builders. Just post your job to get quotes from MyBuilder's Extension Builders in Hertford.

Select a service

How it works

Post your job for free

Tell us about your job, and we’ll alert suitable tradespeople in your area. It’s simple and free.

Tradespeople respond

Once your job is posted, you’ll get responses from interested tradespeople through the website.

Review profiles and choose

Browse profiles, work history, and feedback, then choose who you wish to share your details with.

Some of our top rated extension builders in Hertford

1889 Results

Sort by:

DRJ Homeimprovements
Rating: 4.9 out of 5
Extension Builder in Hertford
DRJ Home Improvements Ltd provides reliable and trustworthy service completed to a high level of standards because I believe you don't need to move, Just improve. I have got 20 years experience in the building trade satisfying clients. We are a team that will get your job done from start to completion.
Get in touch
Latest review:
Extensions- 17 Mar 2026
I would not use Dan again. Complete lack of expertise on certain aspects of this build resulting in a lot of stress for me. Failure to gain necessary permissions despite Dan's reassurances at the time. An error on Dan's part related in the entrance to my property having to become much smaller than I needed. Disappointed overall.
Milestone Brickwork
Rating: 5 out of 5
Extension Builder in Hertford
Local bricklayer based in herts and Essex, we also undertake patios and fences.
Get in touch
Latest review:
Jack came and quoted to lay a new patio and a shed base. He listened to exactly what I wanted (something other workmen didn’t do!) and came back with a very reasonable quote and said he would complete the job on a weekend as I wanted it done asap. From start to finish Jack was really polite and friendly and worked really hard to get the job finished - so much so, I’m adding more bits to the garden and will get Jack back over to do it!
Amwell Build Limited
No reviews yet
Extension Builder in Hertford
Family Business run for over 30 years, we do jobs from Patios to Complete Newbuilds start to finish, no job to big or small, were the guys for your project
Get in touch
Crown Building Services
Rating: 5 out of 5
Extension Builder in Hertford
Crown Building Services is a family run carpentry and construction company based in Essex. We have 45 years combined experience in carpentry first and second fix and 15 years experience in extensions, loft conversions and general construction. With a keen eye for detail we pride ourselves in completing all our work to an extremely high standard, as well as being trustworthy, honest and reliable tradesmen. No job too big or small with free no obligation quotes.
Get in touch
Latest review:
Extensions- 10 Sep 2019
Do not hesitate to use these guys. Nothing is too much for them. Rob and his team built my kitchen extension and I am over the moon with the work. Rob is a perfectionist and from day 1 was personable, professional and 100% trustworthy. The plumber, electrician, bricklayer, tiler and carpenter that were used were top class. They all made the whole process so easy. I would wholeheartedly recommend this company and their team. If you would like to come and have a nose, just let the company know and I am happy to show you their work. Any changes that we made along the way were taken on board and everything is perfect and exactly as we wanted. The guys never cut corners. Thank you for our beautiful extension. It has changed the way we live for the better.
Aquarius PH Ltd
Rating: 5 out of 5
Extension Builder in Hertford
Reliable, highly skilled and exceptionally well organized company providing maintenance, repairs and plumbing services We pride ourselves in delivering friendly, tidy, quality service every time with customer satisfaction being our main priority.
Get in touch
Latest review:
Bathroom Fitting- 9 Feb 2019
Andrew did a fantastic job in installing a new bathroom floor and bath suite. As the bath had leaked below, he also replaced the ceiling. The quality of work is fantastic, whilst at the same time cleaning up after completion of works. I would definitely hire Andrew again as the standard of work is incredible.
Perparim
Rating: 5 out of 5
Extension Builder in Hertford
An established bricklaying business offering all aspects of bricklaying services in and around London and the south east areas. We are reliable,friendly, professionals that take pride in our work and guarantee jobs to the highest standards
Get in touch
Latest review:
Great work, good communication skills very happy with the service Job got completed on the promised timescale
RNB Construction
No reviews yet
Extension Builder in Hertford
RNB Construction are able to offer a complete design and build package for the residential homeowner. We can help clients develop their concepts from ideation, through architectural interface, planning and into a high quality build. We also offer main contracting roles where clients have plans and permissions in place and are just looking for a high quality reliable builder to carry out their project. We were established to bring a professional approach to clientele looking for reassurance
Get in touch
JCL Renovations Ltd
Rating: 5 out of 5
Extension Builder in Hertford
We are a construction with over 20years experience between the team, We undertake all aspects of renovation work including house renovations and extensions. We also have extensive experience in laminate, hardwood flooring and decking installation. We offer a solution for any projects from start to finish all in one place.
Get in touch
Latest review:
Repointing- 23 Jan 2020
Job well done. Will definately use in the future.
Defender construction
No reviews yet
Extension Builder in Hertford
Been in the building industry since leaving school so around 35 years experience ,,have I wide range of knowledge between myself and sun contractors when needed ,,, huge amount of experience in extensions , loft conversions ,,, complete re furbs ,, fitting bathrooms , kitchens etc to completion ,, have many examples that can be shared via pictures or physical visits to completed jobs is also an option and work well with potential clients .
Get in touch
HCS
No reviews yet
Extension Builder in Hertford
Hi We’ve been in the building trade 28 years give or take we have a many extensions complete to high standard which very in size , we are heats registered installers for over 14 years also installing all multi fuel stoves , flue installations , fireplace reconstruction, you can check out our facebook business page (Herts chimney services) loads of reviews on there . We always aim for the highest standard of works , we are reliable hard working team Herts chimney and construction services I will admit I could build you a house literally from the footings up right to completion but I wouldn’t say I’m the most technically skilled. I have hundreds of previous projects you could phone if you wanted more reassurance I’ve only really loaded fireplace installs with fireplace reconstruction there are some photos of buildings we have done recently. Please contact us you will soon see I’m honest and fair and take pride in reliability. Give us a chance it’s super hard getting your 1st contract on here. Thanks for time also Ive been told many many times if we do come across any issues/problems I will inform you and we would get a plan together unlike some show we say !!!! Contact us you won’t regret it 👌
Get in touch
J.c.s.builders and gardening services
No reviews yet
Extension Builder in Hertford
J.c.s.builders and gardening services. General building work undertaken. From roofing repairs to full roof installations guttering facia and sofic install. Garage conversions. Bathrooms kitchens gardening all aspects of work undertaken. I've got over 25 years experience in the building trade. I take pride in my work. I've got liability insurance. I treat my customers with respect and care and give the best price. O.a.ps get a discount as I like to look out for there wellbeing. J.c.s.builders and gardening services the name you can trust
Get in touch
Jewel roofing & building
No reviews yet
Extension Builder in Hertford
We cover all roofing general building works decorating plumbing carpentry kitchen and bathroom renovations at a competitive price. Customer satisfaction is all we aim for. Free quotations for any customer
Get in touch
Goodwood Building Contractors Ltd
No reviews yet
Extension Builder in Hertford
Family run small/medium building company based on trust, reliability, good service and professionalism! Combined experience of 65 years. Great knowledge and contacts with professionals e.g architects/structural engineers and all trades. Residential and commercial experience, with plenty of happy clients / testimonials Carrying out: - Extensions - Conversions - New builds - Minor works
Get in touch
sb services
Rating: 5 out of 5
Extension Builder in Hertford
We offer a range of high quality services, Extension, lofts and full or part renovations, plumbing and certified electrical work, we have gas safe engineers for anything gas related, kitchens and top quality carpentry work, bathroom installation and high end tiling, Flooring installation of all varieties (carpets, vinyl, tiles, wood) Whether it’s high end or a rental, we treat all jobs as if they are in our own home
Get in touch
Latest review:
Kitchen Fitting- 25 Feb 2019
Scott fitted new kitchen, including new units, electrical sockets, new wall and floor tiles. He worked hard, on time, punctual, and on budget.
Philip J Pulzer
Rating: 4.7 out of 5
Extension Builder in Hertford
As a design and build contractor, we will produce drawing for both planning approval and building regulation. We will then provide a detailed estimate of building costs. If we do win the building co tract then all architectural design cost will be free of charge.
Get in touch
Latest review:
Extensions- 11 Feb 2019
Completed job on expected timeline and assisted when challenges came up
J Cleary Construction ltd
Rating: 5 out of 5
Extension Builder in Hertford
here at j cleary construction we have 16 years experience in building and renovating properties, All types of building work and renovations are covered, when you come to us some of the things we cover are demolition garden builds steel work foundations knock throughs Kitchens extensions loft conversions renovations plastering carpentry electrics plumbing flooring chimney breast removal tilling roofing stud walls dry lining drainage concreting if we can fit them in Even small jobs like hanging mirrors and boxing in of pipes we can also supply kitchens and flooring at very reasonable prices
Get in touch
Latest review:
Extensions- 28 Jul 2022
Top notch builder - went over and above what was needed, worked well with the architect, followed all building inspectors requirements (at times advising them), kept to the schedule & budget and kept us informed all the way. So much so friends have already hired Jack My advise is get in quick as he is being snapped up for work fast

Top rated Extension Builders

Our Extension Builders in Hertford, are rated 4 out of 5 based on 17 reviews from customers like you.

Quality screening

Easily find verified local tradespeople. Just post your job to get quotes from tradespeople near you across the UK.

What types of services are offered by local extension builders in Hertford?

Building an extension is a major milestone for any home. It’s not just about adding extra space, it’s a big step that can transform how you live day to day, opening up new possibilities for comfort, lifestyle, and family needs.

This is why it’s so important to find the right extension builders in Hertford for you. They can help with a variety of tasks and projects, including:

Extending your home with an extra room
Two+ storey extensions
Adding partition walls to create more rooms
Building annexes or external structures

To find the right extension builder near you, simply post your job on MyBuilder. Explain the type of help you’re looking for, and then home extension builders in Hertford who are available and interested can respond to your post.

Browse profiles, read customer reviews and get quotes from your chosen Hertford extension builders, all before you decide who to hire.

What are the hourly rates of extension builders in Hertford?

Before getting started with your extension project, it’s important to have a clear budget in place. On average, extension builders in Hertford will charge between £16 and £42 per hour.

Single-storey rear extensions cost between £20,000 and £60,000 depending on size and finish.
The cost of double-storey extensions, which add more space and value, can range from £100,000 to over £170,000.
Larger wrap-around extensions that combine multiple extension types can range from £40,000 to over £120,000.

The cost of an extension will vary depending on your property. For instance, extending in certain areas may require structural adjustments to ensure stability, which can increase your material and labour costs.

To get an accurate price for your home extension, request detailed quotes from several Hertford extension builders near you on MyBuilder. This allows you to compare what each quote covers and how much your Hertford home extension project is likely to cost.

Find extension builders in Hertford with MyBuilder

Hiring the right extension builder in Hertford with MyBuilder couldn’t be easier. Just follow these simple steps:

Step 1: Post your extension project on MyBuilder

Whether you’re planning a single-storey extension, a loft conversion, or adding a new room, post your job on MyBuilder to find local Hertford extension builders. Once your job is live, we’ll share it with home extension builders in Hertford who can express their interest.

Step 2: Compare different extension builders in Hertford

When you start receiving interest, review profiles of local Hertford extension builders, check their previous work, and read real customer reviews. Ask about timelines, materials, and request detailed quotes.

Step 3: Hire Hertford extension builders with confidence

After gathering all the information and quotes from your chosen home extension builders in Hertford, compare their experience, guarantees, and costs before choosing who to hire.

You’ll also have confidence knowing that every tradesperson on MyBuilder is verified through several checks, including:

ID verification: When a tradesperson joins MyBuilder, we ask for a valid ID, such as a passport, ID card, or eIDAS certificate.
Company verification: For tradespeople operating under a company, we make sure every tradesperson has a registered business.

Did you know? Our continuous monitoring and complaints process ensures that tradespeople who don’t meet our standards are promptly removed from MyBuilder’s platform.

Hertford extension builders are ready to help. Use MyBuilder today to find the right professional for your home extension.

What to ask a Hertford extension builder before hiring?

Before hiring an extension builder in Hertford or extension building company in Hertford, ask a few key questions to make sure you’re choosing the right professional for your home extension project.

What qualifications and experience do you have as an extension builder in Hertford?

An extension builder in Hertford should have a strong track record with similar projects and relevant building qualifications or trade memberships, such as the Federation of Master Builders (FMB) or TrustMark.

Will my home extension meet all building regulations and planning requirements?

Your Hertford extension builder should ensure the project complies with Building Regulations and, where necessary, handle or assist with planning permissions. Ask how they manage building control inspections and what documentation you’ll receive once the project is complete.

What experience do you have with similar extensions in Hertford?

Ask to see examples of their previous work, or view examples of their work on MyBuilder. Ideally projects similar to yours in scale and design. This helps you assess the Hertford extension builder’s ability to deliver a result that meets your expectations.

How long will the extension take to complete?

Extension project timelines can vary depending on size, complexity, and weather. A typical single-storey extension might take around 8 - 12 weeks. Request a detailed schedule so you know what to expect and when key milestones will be reached.

Do you offer a guarantee for your work? Most Hertford extension builders offer a guarantee or warranty on their work, often between 1 and 10 years depending on the project and materials used. This gives you assurance that any issues will be resolved after completion.

If you still have questions about the professional you are looking to hire, we have a full detailed guide on hiring the right builder here.

FAQ: Common questions about home extensions in Hertford

Can an extension builder in Hertford help with planning permission?

Yes, many extension builders in Hertford can guide you through the planning process. They can help prepare drawings, advise on local requirements, and liaise with your local council to ensure your project meets all necessary regulations.

Can an extension builder in Hertford handle everything from design to construction?

Many Hertford extension builders offer full design-and-build services, managing both the architectural planning and construction stages. Ask your builder whether they can provide a complete package or if you’ll need to hire an architect or designer separately.

Will an extension builder in Hertford help with materials and finishes?

Yes, most extension builders in Hertford can source materials and offer advice on finishes that suit your design and budget. You can also choose to supply certain materials yourself, just make sure this is agreed upon before work starts.