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Local house extension experts in Harpenden, Hertfordshire

There are 1284 House Extension specialists in Harpenden, and last month we helped homeowners get quotes for their home improvement jobs.

Browse House Extension specialists in Harpenden, Hertfordshire

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Latest homeowner review

Reviewed by bharat on 12/10/2012

Very helpful and pleasant. Did a good job.

Allrounduk is a family run company providing a professional service to the domestic construction industry. We have been operating for 15yrs and offer a one stop shop for all your domestic requirements from small to large projects and everything in between

Latest homeowner review

Reviewed by Hanni on 11/3/2019

Cannot recommend highly enough. The work was finished to a really high standard. They were really adaptable when the tiles we had ordered failed to arrive on time. They adjusted their plans and worked really hard to get the work done on time, without compromising on the quality of the finish. They were also really considerate of working around young children, and were very patient with little interruptions from a fascinated six year old!

Latest homeowner review

Reviewed by Debbie on 27/10/2013

overall very good job done. Very friendly, professional, helpful and completed job in timely manner. would recommend.

SJ Builders

House Extension in Harpenden

Latest homeowner review

Reviewed by Dominique on 21/1/2016

I thought Sean was polite and friendly and worked efficiently. I will definitely use him again if I need any painting or decorating done.

Latest homeowner review

Reviewed by Alberto on 15/3/2016

Would recommend

From small repairs to full refurbs I can cater for all your needs, small enough to care, big enough to cope on an adhoc basis and/or ongoing property maintenance. Landlord certificates and inspections also arranged.

Latest homeowner review

Reviewed by James on 24/3/2018

Very pleased with Zoltan. Worked very hard through snow and illness to get the work done for us. Would highly recommend.. Thanks Zoltan!!

Latest homeowner review

Reviewed by Ravi on 21/2/2015

Good Work! Abdul The Main Man For All Your Needs! Great Quote Finished In 3days As He Said! Gregg Was Very Hardworking Helped With All My Needs. I Would Definitely Recommend! A*** Ravi B

Artan

House Extension in Harpenden

Latest homeowner review

Reviewed by Angela on 20/6/2016

See star rating. I have asked Artan to do further work. He's polite and very helpful and completed the work, in my judgement, to an excellent standard. I would recommend him to my friends and work colleagues.

We are dedicated to quality and details.

Latest homeowner review

Reviewed by alex on 26/1/2017

Excellent work, high quality. Professional pleasant guys. Danny and his team motivated hardworking, clean tidy 6 months work , very good all-round. Multi skilled trades within company of brothers. Minimum amount of fuss , trustworthy Non smokers, very reliable, kept me updated , good knowledge . Fitted Wren Kitchen,built porch extension , converted garage to studio apartment decorating,plumbing, tiling , new bathrooms and shower rooms. Built fitted wardrobes. internal external doors.

Latest homeowner review

Reviewed by Daniel on 9/1/2014

Andy quoted me for the main job (kitchen refurb) and carried out two smaller jobs in the meantime while I am still planning. Excellent standard of work, quick, and a nice guy. Will be using him again in the near future.

I am a small reliable business based in Aylesbury. I will complete any domestic maintenance required and gardening service.

Latest homeowner review

Reviewed by Keith on 2/4/2013

Arrived on time. Did the job well. Very reasonable charge. Recommended.

geo-tlamp

House Extension in Harpenden

-Extensions -Conversions -New build ,Refurbishments Garage conversion Flat roofs And more.

Latest homeowner review

Reviewed by Kim on 3/11/2024

Piotr was meticulous in his work and very knowledgeable. He did a great job for me and I would use him for any further projects I have.

I am a self employed bricklayer with 9 years experience. Hard working, reliable, city and guilds trained specialising in all aspects of brickwork from traditional methods to new build.

Latest homeowner review

Reviewed by Nathan on 9/12/2014

Callum worked on an extension for us all the work he did was of high quality, he helped source materials for us which was a great help. Was very polite and always left the site tidy. Had a small problem tying in coming back to complete a bit of outstanding work but apart from that very happy with all his work and price. Would definately recommend callum for all your brickwork needs.

We are growing building company directed by experienced builders. Our specialisation is extensions, brickwork, carpentry, tiling, garage conversions and general building and maintenance works.

Latest homeowner review

Reviewed by Emy on 5/9/2016

Hired Marcin to do a brick and block wall for a 4meter extension, great job, great ideas. Highly recommend him.

Accuracy,fast,clean and tidy.Ability insurance.

Latest homeowner review

Reviewed by daniela on 11/5/2013

fast and clean

DC Build and Fix is a team of professional, reliable Polish tradesmen offering a full range of home improvement services. The company's collective experience is based on over 15 years of construction work. DC Build and Fix offers a wide range services.

Latest homeowner review

Reviewed by jill on 28/8/2013

Absolutely top class lovely men. Excellent, clean, friendly, helpful and carried out wonderful job thank you guys! Cannot recommend highly enough, you will not be sorry.

Established over 80 years ago London Builders are FMB & NHBC registered & operate in Greater London providing a comprehensive range of services for residential properties from design and construction through to refurbishment, repairs & re-decoration.

Latest homeowner review

Reviewed by Brian on 24/4/2017

They were really professional compared to the other builders that came and contacted me. The Project Manager was also on hand to answer any questions I had and offered me adviced on how best to move forward. We ended up refurbishing our entire bathroom which is looking great now. I would highly recommend London Builders.

We are a building and roofing company based near Royston in Hertfordshire,we pride ourselves on high quality work combined with efficiency. We have a very strong portfolio,we work with local architects as well as individuals.

Latest homeowner review

Reviewed by David on 25/4/2019

From the start to finish could not fault the commitment shown by the builder, the quote came in under our budget and work was to a high standard. Always kept us informed on what was going on and when, tidied up as they went and we are more than happy with the final result.

Latest homeowner review

Reviewed by jose on 30/10/2014

All work done for me by KD construction was excellent. Work men are very polite and friendly. I would recommend KD constructions to all my friends.

Kitchen and Bathroom Installation done to perfection We install kitchens and bathrooms and carry out extensions and loft conversions as well as provide other building services in London and the surrounding areas. With 20 years of experience, our team can deliver any building project on time and within budget. We guarantee our work and we also guarantee not to consider any job complete until the customer is 100% satisfied with the end result. Other building services we offer are open plan conversion, flooring, tiling, plastering, bricklaying, painting, decorating and bespoke joinery. Kitchens and Bathrooms We install kitchens and bathrooms to a high standard and work hard to ensure that every detail is millimetre perfect. We provide trade discounts so please be sure to make contact before purchasing materials. Extensions and Lofts We build extensions and loft conversions and offer open plan conversions of existing floor layouts. We work closely with our customers and other stakeholders to turn your building dreams into a reality. Other Building Services Whether you need a wall built or tiled, a floor laid or an outside space transformed, we have the skills to get the job carried out perfectly and look forward to working with you on your next project. FAQs Which Areas Do You Cover? We are based in Ealing, North West London and cover all neighbouring boroughs. What kind of kitchens and bathrooms can you provide? Everyone has their own taste and preferred style and we are very flexible to your creative requirements. We can do anything from single wall kitchens, L and U shaped Kitchens to Island and Peninsula kitchens. In terms of Bathrooms we offer Full, Three Quarter, Quarter, and half bathrooms. Can you decorate our kitchen or bathroom as well? Yes, we can provide painting and decorating in addition to building your desired project. Can you provide Trade discounts? Yes, we can provide trade discount for Howdens Kitchens and Trade Point.

Latest homeowner review

Reviewed by Christine on 24/4/2024

The job was to hang a large mirror and clock . The job was booked and completed in a matter of hours. Very clean work and efficient delivery.

EtmondC

House Extension in Harpenden

Latest homeowner review

Reviewed by Petros on 1/7/2016

We needed our small box room painting at short notice. Brilliant job, reasonable price and very thorough. Would definitely use again.

NIK -2015

House Extension in Harpenden

We are a Family owned Building company Our Team is with over 9 years of Experience We are Providing : Painter / Decorator Designer -Its time to Change your home Design lots of Good Ideas Carpenter, Tiller, Gardener Free Estimates

Latest homeowner review

Reviewed by Moni on 14/1/2021

Nik team did a fantastic job with replastering water damaged walls and re-grouted my shower room. They even attached a new ceiling light fitting for me, complimentary as a new customer. The work was done in good time, communication via watsapp was impeccable. and prices/quotes were competitive. I would highly recommend them to my friends and family and will be using them again. Thanks Nik team

Hi my name is Ashley I'm the owner of W.H home care & repairs I offer a wide range of maintance skills indoor and outdoor please look at my profile pictures and ratings many thanks.

Latest homeowner review

Reviewed by Ian on 30/5/2024

Quick, professional and quality job.

We are pleased to continue providing a professional and dependable service to all our clients, fully recognizing the essential role that high-quality standards contribute to our success. Looking forward, we anticipate that the robust relationships we are cultivating will result in an increased number of satisfied clients, fostering further recommendations and sustainable growth.

Latest homeowner review

Reviewed by Angela on 13/11/2015

Fedor and his team are polite, hard-working and extremely talented. It was a complicated job and Fedor handled it brilliantly. We are absolutely delighted with the beautiful London Stock brick wall that has been built. We would definitely recommend Fedor and Cuicut Construction, and will certainly use them again in the future.

At OCTOPUSBUILDERSLIMITED, we pride ourselves on our extensive 16 years of experience in the construction industry. Our dedicated team works collaboratively to handle every aspect of your building project from A to Z. Whether it’s residential or commercial, we ensure quality craftsmanship and excellence in every job. Let us turn your vision into reality!

Latest homeowner review

Reviewed by NORMAN on 1/10/2024

Great job and would definitely rate it higher if I could. Will keep in mind if I need other jobs done around the house.

We specialise in all aspects of construction work. We are completely dedicated to our work and put our experience into the job to make our customers satisfied. We aim to do our best and succeed 100%.

Latest homeowner review

Reviewed by Ralf on 9/4/2018

One to be careful with is the electrician Ben. The work seems alright, but his advise left us with excessive lighting in Kitchen and sitting room and our decision against TV sockets in ALL rooms was interpreted as NO TV and phone socket at all, which then later had to be added at extra cost and left the choice of suppliers limited. His crew also did the plumbing and the bathroom installation and the later was not done to the general standard of U&U constructions work.

My name is Ioan I’m in the construction industry science 2013 Iwas working for one company until last two years when I decided to stated my own business.

Latest homeowner review

Reviewed by Marc on 21/4/2025

Ended up delaying the project by a year but he just completed it last week. Was really happy with the result.

Tac Building is a building construction company based in Watford, Hertfordshire, and has operated throughout Watford, Harrow and surrounding area for over 15 Years, focusing on the delivery of small to medium sized alteration, refurbishment, and new-build projects. If you are looking for the builder to carry out your kitchen extension, either by extending to the side or the rear, or if you are after an extra bedroom with a bathroom at the loft, you can be certain we will deliver.

Latest homeowner review

Reviewed by DEEPAK on 23/2/2025

We used TAC Building for a full bathroom renovation. From the moment we met Tom, we were really impressed with his knowledge and experience in the industry. Our bathroom looks amazing, and his whole team worked really hard every day. The quality of the finish and the attention to detail are things that you only find in high end tradespeople, and he is definitely one of those. We have used Tom for other jobs since, and will again in the future. Thank you Tom.

Do not pay attention that we are new on this website...the experience is ours! We do: rendering, painting and decorating, floors and carpeting, woodwork,tiling and flooring, plumbing, windows and doors, brickwork, electrics.

Latest homeowner review

Reviewed by Ellisha on 3/4/2025

I recently had my bathroom floor tiles replaced. Chris was tidy, efficient and communication was transparent throughout. Happy with the end result and would recommend Chris to others.

We can offer with confidence a professional and innovative service . Regardless of size or difficulty we will fulfill and exceed all criteria within your budget and time allocated.

Latest homeowner review

Reviewed by PATRICK on 4/8/2024

AS Roofing & Construction Ltd is your trusted expert for all aspects of roofing and construction. With over 15 years of experience in the building industry, we bring knowledge, skill, and a commitment to quality to every project we undertake. We specialise in all types of roofing, including: • Pitched roofs with slates and tiles • Flat roofs using felt, liquid coatings, rubber, and fibreglass systems • Full lead work services including lead welding • Cement work, pointing, and general brickwork repairs Beyond roofing, we also undertake full property builds from the ground up, handling every stage from foundations to final finishes with precision and care. Our services also include: • Jet washing of roofs, driveways, patios, and building exteriors • General bricklaying and masonry work At AS Roofing & Construction Ltd, we pride ourselves on delivering reliable, high-quality workmanship with a friendly, professional approach. Whether you need a small repair, a full re-roof, a new build, or property maintenance, you can count on us.

Latest homeowner review

Reviewed by Mark on 15/5/2025

Top job done!....Aaron a respectful and competent fella.

We are a specialist Loft Conversion company with over 15 years experience. We offer a complete solution, design, planning and construction for your project. With references all over London you are welcome to view past projects. Call for a free quotation.

Latest homeowner review

Reviewed by Paul on 21/5/2022

Had a very positive with Mark and the Unique Lofts team for our loft conversion. I would highly recommend them. Michael and Brad (our team) were friendly, dedicated and hardworking. Our neighbours, who had the skip chute cross their garden, also shared how considerate and friendly they were. Michael kept me in the loop, followed up on my enquiries and gave some really helpful advice in moving airing cupboards and opening up the loft space for more natural light. All in all, highly recommended.

Dali Ruka

House Extension in Harpenden

I have over 15 years of experience in the trade, starting from working in the family business. Specializing in carpentry, we also offer building services, floor fitting, refurbishments, loft conversions, and window fitting. No job is too big or too small. Proudly serving London with quality craftsmanship and attention to detail.

Latest homeowner review

Reviewed by Jean on 28/7/2023

Great job done and very polite and professional at all times.

Am construction are a highly friendly & experienced team of builders with over 15 years experience in all aspects of construction. From little jobs to large projects. We care about our customers and our own quality of work so are always happy to “go the extra mile” and if our customers need ideas we absolutely love getting involved in the plans as well.

Latest homeowner review

Reviewed by Bob on 19/11/2022

The whole job was completed excellently from start to finish. Prompt response and quick work. I would definitely use them again

Hello. We are the company that will provide our services quickly,qualitatively and at a good price. Do not hesitate to contact us.

Latest homeowner review

Reviewed by Ben on 15/6/2025

BUILDER

House Extension in Harpenden

I have been working in London since 2007, in those 16 years I have done plastering, wooden flooring, wooden fencing, ceilings and much more. I am new to Rated People, however I have the experience and can provide reference for previous work upon request.

Latest homeowner review

Reviewed by Francoise on 29/5/2025

Vasile replastered two ceilings in one day. He did an amazing job, and kept everything clean leaving the rooms spotless. Would definitely recommend. F.

AGC Electrical is a small and friendly company with an emphasis on customer satisfaction. Our pricing is reasonable and we aim to provide the best overall experience to all our customers.

Latest homeowner review

Reviewed by rachel on 11/2/2025

Good communication and was on time. Job was done well.

B S Building Services

Latest homeowner review

Reviewed by Mick on 27/7/2025

Bartek arrived promptly explained what we needed doing took pictures Recieved a quote from him happy with everything 2 weeks later on Sat morning arrived completed work's exactly what we wanted proficient and cleaned totally when finished would 100% hire him again

LK Designs London specialises in the design and installation of all types of building projects including kitchens, bathrooms, extensions and loft conversions. We have thirty years experience of turning a client's vision into reality. We are a professional, creative and dedicated team that can take your project from beginning to end and we give our clients peace of mind with the service we provide. Our 5 star reviews are testimony to this high quality service.

Latest homeowner review

Reviewed by Megan on 31/7/2025

Ludvik and the team did an amazing job on our office kitchen! They were quick to respond and efficient with their work, and we are really impressed with the quality of the end result! Can't reccomend enough!

I have more than 15years experience in building work The work which I undertake is Lofts Extensions Kitchen Bathrooms Bedrooms Interiors Pluming Electrical Exterior Safety / Security Roofing Qualifications Joinery Kitchen installations Bathroom installations Carpentry work (doors, wardrobes, flooring) Plumbing Plasterboards and metal work Tilling walls, floors Gardens wooden storage shed.

Latest homeowner review

Reviewed by Naomi on 25/1/2024

Amir arrived to fix my leaking toilet. He was polite, tidy and efficient . I will use again with future works

I’m very good builder I have a experience 12 years

Latest homeowner review

Reviewed by Joanna on 10/2/2024

Competitively priced and did a great job. Were tidy and got the job done in good time. They replaced the ceiling in the bedroom, put in some additional sockets and moved and light switch and decorated the room.

DNC Carpentry and fit out was establish in 2014 by Dumitru Creanga who has over 20 years experience of site carpentry. We offer supply and fit services for kitchens and fitted wardrobes to maximize every millimeter of your space in high ceilings rooms, tailor-made wardrobes to fit exact contours of your space and sloping ceilings, understairs cupboards where storage space is just waiting to be created, landing and hallways creating storage where you didn't think you could have it. The company has over 20 experienced carpenters who have to demonstrate to meet DNC Carpentry and fit out high standards before being allowed to join the company. All of our carpenters hold CSCS cards as a minimum and undergo a continual programme of training. We're very proud of our products with an obsessive attention to joinery. When you buy a product, it's designed specifically for you. Nobody else. Your family, your lifestyle and to your rules. And rightly so; it's a big investment, a dream, in most cases. And one that we want to get IT right. Not only are our customers looked after by an experienced Designer, they're also cared for throughout the installation process by one of our Project Managers. Giving peace of mind to our customers that they are in safe hands every step of the way.

Latest homeowner review

Reviewed by Leonie on 3/6/2024

The job is still ongoing but the guys have been commutative and quickly responsive

Construction company .Quality is my priority.the best price keep my clients happy.thank you

Latest homeowner review

Reviewed by Stuart on 3/8/2025

Gabi responded quickly and came round promptly. Completed the required work and also suggested additions to make the door stronger.

A small company that is hard working and trustworthy, we take on a variety of works and try to give the best advice possible.

Latest homeowner review

Reviewed by Paul on 27/3/2022

Unfortunately I am still waiting for a quote which is disappointing.

I highly recommend AYG Construction , very good job quickly done very reasonable quote, thanks to Adrian for his hard work. Finished double storey extension on time and very helpful throughout.Excellent quality and price. Welcome back any time. Thank you!

Latest homeowner review

Reviewed by Mark on 20/1/2016

Adrian and his team met or exceeded my expectations, always willing to match my needs and finished the job on time and within budget.

25 years in the trade and have taken various jobs on board. Fully qualified and committed to putting a smile on your face ????

Latest homeowner review

Reviewed by NADA on 14/8/2014

Simon did an excellent job on the wardrobes. He removed and replaced double slidding built-in wardrobes from one room into another. Dedicated, honest and polite. Very happy with the work. Saved the contacts and will using their services often.

Allswell

House Extension in Harpenden

ALLSWELL BUILDING are based in Ruislip and cover London and surrounding areas. We tend to all your building, refurbishment and property maintenance needs. We work along side our clients on their projects to create a professional and personal finish.

Latest homeowner review

Reviewed by Ronald on 9/4/2013

Excellent service, Reduced costs when fault was found to be different from initial thoughts.

Latest homeowner review

Reviewed by Amit on 5/2/2014

Sometimes, passage of time provides an insight into the quality of work & reliability of a tradesman. Soon after my job was done, two windows developed internal condensation. Mark initially defended but visited us to have a look & accepted his fault. Promised to have this fixed. But time after time,after repeated calling he kept on providing fake promises & finally has now stopped taking my calls as well. My strong advise-avoid. If a windows expert cannot handle a window, then you can guess his skill level!

Latest homeowner review

Reviewed by Chris on 11/4/2014

Vey helpful went above and beyond to get the job cimoleted

We have a double glazing factory and have been erecting bespoke windows,porches and conservatories for the last 12 years.

Latest homeowner review

Reviewed by Mokdus on 5/3/2017

Very good job

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Recently completed jobs

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Double story extension of...

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Looking for a 3m x 3m extension. 1 brick wall, rest all glass if possible

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I need a quote for a ground floor extension size 3000 x 4000 x 2400

Size of extension: 1 room...

Size of extension: 1 room Height of extension: 1 floor Room(s) to be in the extension: dining room, kitchen, lounge/living room Single storey rear...

porch and small wc extension

porch and small wc extension

Renovate 4 bed 60s house 133m,...

Renovate 4 bed 60s house 133m, take back to brick and 2 story side and back extensions adding 135m

Single flat roof extension...

Single flat roof extension with skylights

Extension

Rooms in extension: 1 Rooms used for: Utility room, Lounge/Living room. Floors in extension: 1 Architectural plans done: Yes Planning Permission...

Convert Ground Floor wc's into...

Rooms in extension: 2 Rooms used for: Toilet, Bedroom(s). Floors in extension: 1 Architectural plans done: Yes Planning Permission status: Not...

Extension Semi-Detached House

Rooms in extension: 1 Rooms used for: Bathroom, Bedroom(s), Kitchen, Utility room. Floors in extension: 2 Architectural plans done: No Planning...

How our service works

  1. Create a job - it's free

    We'll connect you with the right tradespeople, from over 30 different trades.

  2. Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  3. Check ratings

    Look at each tradesperson's profile to see their ratings and reviews.

  4. Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  5. Job done

    Leave a rating for your tradesperson based on quality, reliablity and value.

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