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Local house extension experts in Harpenden, Hertfordshire

There are 1301 House Extension specialists in Harpenden, and last month we helped homeowners get quotes for their home improvement jobs.

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Latest homeowner review

Reviewed by Stacey on 9/8/2011

Had a wall knocked down and new floor fitted by Phil. He was extremely careful not to cause too much mess and double checked before going ahead with any work. I would definitely recommend him to friends and family and use him for any future work!

Djc Contractors has been in business for 15 years, we have carried out many, extension, loft conversions, new build and total refurbishments in the London,Hertfordshire and Essex areas. We have many previous clients that we would be more than happy to show off are work.

Latest homeowner review

Reviewed by Theresa on 8/3/2023

Living 100 miles from the job, I needed a reliable contractor I felt I could trust. David and his team more than lived up to my expectations. He renovated a complete one bedroom flat from re wire, re plumb, new boiler bathroom, kitchen, flooring, fitted cupboards etc the list goes on. All work was carried out by qualified trades people and certificates of work issued where necessary. He started the job when he said he would, worked long hours and most importantly finished ON TIME, ON BUDGET.

30 years experience

Latest homeowner review

Reviewed by Beata on 27/11/2017

Chris contacted me promptly after putting my job ad and offered his availability straight away. I had solid wood flooring to lay on newly built extension, and it needed to fit the old floor. Chris did a great job, showing great carpentry skills, he worked hard over the weekend so I could have the living room sorted. He is very knowledgeable in his trade, I am very happy with his work and I would highly recommend him. Beata , Stevenage

Welcome to Saltstone Developments. We offer quality works using over a decade of experience to provide you with a turn key package for any project. Make Your Dream Home a Reality. Contact us now.

Latest homeowner review

Reviewed by Alison on 10/6/2021

Excellent work- painted fence, shed and bench as requested. Highly recommended

We do commerical, domestic and industrial building work, Fully Certified, No job too big or too small. Over 10 years worth of experience in the trade. Covering all aspects of the building trade. From electrical, plumbing, tiling and many more. We are COVID safe and always work in a safe work environment. If you have any more questions please don’t hesitate to ask and we will be happy to answer. Stay safe

Latest homeowner review

Reviewed by Shiv on 13/9/2021

I ha been having issues with my shower for MONTHS with it constantly flickering between hot and cold! I had already called BritishGas, Affinity Water and multiple other trades and I just needed someone to look and and fix my issue! Brendan turned up exactly on schedule, was courteous and even took his shoes off. He got straight to work and after fetching a part, had the shower fixed within a matter of hours! Absolute GODSEND! Highly recommend!

we pride ourselves in top quality workmanship we are fully insured ,we always keep our site clean and tidy . (no fuss no dust thats us )

Latest homeowner review

Reviewed by Joanna on 26/11/2018

Needed some internal work, including walls and chimney removal. Price was competitive and the work was excellent. Turned up on time, kept us informed and no hidden extras! Not only was the work first class he also took the hassle of building control, submitted the documents and when the inspector wanted an extra bracket for the chimney, he was there, as arranged 2 days later to fit it. If anyone is thinking of needing building work, make sure you include Kevin in your plans.

I am an Interior Designer / Project Manager with a great team of builders who are skilled and possess good, positive, can-do type of attitude. We are in the construction industry since 2002 with residential & commercial projects in the UK and other European countries. We take projects from kitchen refurbishment to full house refurbishment or extensions, loft converssions & office building in the back yard. Our values are: RESPECT HONESTY EFFICIENCY Do not hesitate to contact us for your project! We understand the importance of purchasing a home or improving it hence will help you go through a smooth, great experience.

Latest homeowner review

Reviewed by eric on 8/5/2023

Very professional, competent and reliable builders. I highly recommend A'tudori and I will definitely use them again for any future projects.

MPF Building Services pride ourselves on working to the highest possible standards. Using fully qualified professional tradesmen to cover all aspects of building.

Latest homeowner review

Reviewed by Alastair on 20/9/2019

Michael fitted a velux skylight for us. He was professional, efficient and tidy from start to finish. The install was high quality and I would have no problems recommending him.

I am new to Rated People, however I have 7 years experience in the building trade,

Latest homeowner review

Reviewed by Maz on 17/4/2019

I'm afraid i had to change my rating because we came across an issue with a part of bath fitted in our bathroom after the job was done. We contacted Liviu and asked him to come and fix it, after a few times contacting him, he arranged to come in but never turned up and have been ignoring our calls ever since, so i am very disappointed with the fact that there was no after care service provided.

We specialize in brickwork , pointing , landscaping. structural alterations , refurbishments ,extensions, Offer a friendly reliable honest efficient service and have over 30 years experience.

Latest homeowner review

Reviewed by Thomas on 1/11/2017

Mark was pleasant to deal with, honest, reliable and quoted a fair price. The job ended up not being reprionting due to his advice, but was bespoke work to fix some motorbike ground anchors in a trench of cement. Unusual job, but I discussed it with Mark who was accommodating and completed a good job quickly and conveniently.

I am a bricklayer by trade & have carried out brickwork construction on domestic & commercial to a very high standard for over 30 years also internal alterations, brick & stone arches & fireplaces, & internal decoration

Latest homeowner review

Reviewed by chris on 8/2/2012

A lovely man and a true crafstman, polite, punctual, superb job, tidied up after, cannot recommend him enough. we are having him back for other work.

We are an experienced construction company, providing a range of services, including; extensions, conversions, new builds, renovations, decoration and repairs and maintenance. We pride ourselves on providing a professional and personal service.

Latest homeowner review

Reviewed by Chandra on 5/2/2013

Works hard Reliable Gives honest opinion Trustworthy I had bathroom and kitchen done with materials supply and fit. My budget was £3500 but ended with spending tad more than i thought initially. Great work but takes time as he is one man army.

Bricklaying Specialists and General Builders

Latest homeowner review

Reviewed by garry on 4/3/2014

John and Florin were absolute stars. They completed our work with great professionalism being consistently timely, courteous and extremely helpful. John was very reassuring with many good ideas. He dealt with our work as if it was his own home, always keen to ensure everything that he did was done to his very best. Would definitely employ in the future. Many thanks

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.

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

Latest homeowner review

Reviewed by Andrew on 22/4/2025

Gaby is great and I strongly recommend him. I found him to be extremely reliable, exceptionally capable, a very tidy and clean workman, honest, fair and very reasonable in his costings. I also think that he can turn his hand to a lot of different jobs. Gaby installed complicated stair handrails on three floors and did a terrific job. I have already asked Gaby to do another exterior decorating job for me and would always ask Gaby to do all sorts of decorating, carpentry and building works .

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.

JH BUILD

House Extension in Harpenden

A skilled builder honest and reliable . I put effort and seriousness in everything I do. I like to make all my customers happy! I have experience in: home improvements ,tiling/bathrooms repairs, furniture refurbishment, roofing,painting,fitting laminate flooring, Wood flooring,herringbone flooring,vinyl flooring , ,plastering,roofing.My aim is to provide the best service to you and your home. I guarantee my work is professional and the job will completed in a tidy and timely manner.

Latest homeowner review

Reviewed by Leila on 29/11/2024

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.

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

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.

JDL REFURBS LTD is a small local business that offers the highest standards of work at a fraction of the cost of all these big company's. we are proud that are customers can read this profile and see what we as a company stand for. CORE VALUES 1) RELIABILITY. you can always rely on JDL to meet target dates or do everything in are power to make sure we take any of ur stress away. 2)CONSISTENCY. Is key having a high standard of work.. an old man once told me ur only as good as ur last job. Employ the best and don't have the job done twice. 3) PASSION. JDL has a real passion to be the best in what we deliver. And hopefully all are reviews reflect this. and most of all HONESTY. JDL Refurbs will always be totally honest with you..

Latest homeowner review

Reviewed by Mac on 8/10/2024

John and helper Rhys arrived promptly, did an excellent job and cleared up afterwards. Worked flat out and completed a tedious job quickly and with little disruption. Would recommend.

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

B S Building Services

Latest homeowner review

Reviewed by Daniel on 17/5/2025

Came promptly and was quick to provide a competitive quote. Arrived and spent time making sure everything was covered and did an amazing job. The replacement and repair was done to a much higher standard than expected and I would not hesitate in recommending and using Bartek again.

K5 is a self set up company by myself. I have 22 years experience in carpentry, painting, decorating, skimming, plastering, kitchen, bathroom, staircases, decking, laminated flooring and many more building trades. I take on jobs and complete to 100% customer satisfaction, and also provide advice so my clients can budget their cost in getting the job completed.

Latest homeowner review

Reviewed by jacob on 3/1/2025

K5 did a great nice job and good services!

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Recently completed jobs

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Double story extension of...

Double story extension of detached house

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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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