The quick way to find a local Cellar & Basement Conversion specialist in Welwyn Garden City

Post your job for free. Get quotes. Read reviews.

Over 10,000 rated tradespeople
are ready to help you get your job done

Over 3 million happy homeowners
have found a quality tradesperson

Over 1 million ratings
with 88,000 5* ratings in the last 12 months

Join our group of happy customers

Thousands of 5 star reviews

Read real reviews from customers about their service experiences.

Craig got in touch quickly, gave me a rough estimate over the phone and answered all my questions. Surveyor arrived on time, gave instant quote. Price was good. Michael and (another) Craig turned up to do the job on the day, time given. Good, tidy job. Can't fault anything, from start to finish!! Would recommend!

Mary

George and his team are experienced builders, replaced my front door with a custom frame/sidelights and raising the floor level in the hallway quite quickly - in fact, they were the only who came next day, gave a quote straightaway and were ready to start in just couple of days. They also had all the necessary tools and materials, were ready to buy something additional quickly on the day - if further adjustments were required to fit everything as I asked. Thanks a lot for your help, guys!

Dmitry

Highly recommend. These guys did a fantastic job of constructing our pergola and decking. Very hardworking and reliable. The job was completed in the time frame agreed and to a very high standard. We would 100% use them again.

Holly

Browse Cellar & Basement Conversion specialists

Take a look at our Cellar & Basement Conversion specialists profiles, read reviews and request quotes directly.

Luky Ltd avatar

Luky Ltd

Cellar & Basement Conversion

Luky limited understands how important service is today's competitive market. We provide our customers the highest levels of service and quality. We select and manage our team to treat each project as if it was our own. The future looks bright....!!!

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Ti on 21/5/2023

Superb - head and shoulders above any other builder we have ever worked with. We have undertaken a handful of development projects in recent years, and Lucian is the best by a country mile.

Our award-winning claims management service aims to help policyholders throughout the UK make successful buildings insurance claims caused by storms, burst pipes, accidental damage, fire, floods or other events which lead to the property owners needing to make an insurance claim. We project manage and carry out the required repairs using our fully vetted contractors. Aspray always strive to reinstate the property to its pre-incident condition as swiftly as possible. Aspray Ltd are authorised and regulated by the Financial Conduct Authority for claims handling only.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by John on 14/5/2023

Highly experienced bulder with a proven track record of completing project on time and on budget. I have deep understanding of bulding codes and regulations and I have the technical knowledge to design and cost effective structures . I have strong commitment to safety and quality, and I am an excellent problem solver with a knack for finding creative solutions.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Caroline on 26/1/2025

Hi my name is John from John Alan, we are relatively new to rated people and look forward to offering our professional services. Our services include everything from handyman services to bathroom installations, heating and plumbing. Rest assured when you choose John Alan we provide a fast, clean and efficient service with competitive rates. We look forward to working with you. Public liability insured Gas safe registered

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Ejiro on 26/11/2023

Loved this extremely professional team. I will hire them again in the future. Thorough, knowledgeable and affordable.

From a single tile to a new roof we cater to all with a range of colours and options to suit all budgets. We supply and fit new upvc dry verges and dry ridge to eliminate the ongoing cost of yearly maintenance we also supply and fit maintenance free gutter systems with integrated hedge hog systems in place to ensure gutters need no maintenance we also supply and fit new upvc facial soffits and barge board new walls built and repointing available also we do weather pointing new joists flat roofs we supply and fit Epdm Firestone rubber flat roofs to eliminate the ongoing costs associated with older materials. ig. Felt roofs that will degrade as time passes we also supply and fit upon request eco friendly roof systems for those who prefer a greener planet friendly option thanks for reading any questions pls feel free to contact us

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Stephen on 30/4/2025

All work done quickly, within budget and no fuss. A polite and friendly group of lads. Will definitely keep them in mind for any future jobs Happy to recommend.

The Green Machine will provide you with professional high standards of workmanship with many years of experience and many happy customers so choose us with confidence.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Paul on 29/12/2024

Really nice guy who worked his arse off and did a really solid job of boarding and insulating our loft. Was happy to talk about options to fit my budget. Would totally recommend.

Alin Dediu avatar

Alin Dediu

Cellar & Basement Conversion

Hi I’m alin, I’ve got over 20yrs experience in construction and building. With over 20 years’ experience, i focus on providing all types of building and construction maintenance, giving each customer an outstanding quality of service with competitive prices and the highest finish, which is made to last. I’m skilled in drylining, plastering,carpeting, painting and decorating,extensions,tiling,plumbing electricity, electrical ?etc

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by chris on 8/5/2025

So good. Did a great job, will have Alin back for sure. Very reliable, good price and tidy. Work was done really fast and at very high standard.

Potters Bar Lofts & Extensions We specialize in adding value to your property. With quality workmanship, finished to a high standard. We understand that every home owner has a unique taste and needs. We are a small family run company with many years experience, and we offer an individual service to every costumer. No job to large or to small.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by PANOS on 23/7/2023

RELIABLE-PUNCTUAL.-EFFICIENT .STRONGLY RECOMMENDED..

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Ola on 21/12/2011

Trevor kept his promise and got the job done to a high standard despite the weather turning out to be very wet. He was very business-like and assuring in his approach. I will not hesitate to recommend him for a similar job.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Steve on 11/7/2011

First impressions were good so we decided to use Able to create a new shed and build a gate/fence. They were very informative, thorough and I was extremely pleased with the final product. Able went out of their way to ensure everything I asked for was done. Will definitely use again.

JCC avatar

JCC

Cellar & Basement Conversion

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Paul on 29/12/2010

Very pleased with John work. He and his team are polite,positive and hard working. Costs fully explained and paid based on schedule of works as building progresses. Any issues, changes are discussed and agreed. All finished inside time quoted. I will be recommending to my friends.

West Renovate & Refurbish are a small family-run building firm with a growing client base across Herts, Beds and Cambs. Since the company was established in 2011, we have successfully completed a number of large-scale property refurbishments for clients, and in between these we have undertaken a wide range of smaller domestic building jobs such as kitchen and bathroom fitting. The company is led by Malcolm West, who has gained a wealth of experience in building since 2004, and has specialised in Carpentry since 2009. At West Renovate & Refurbish we pride ourselves on high quality, well thought-out work - doing what is needed to finish the job to a high standard, without adding un-needed extras. Not all of our work is sourced through Rated People - we can supply client testimonials from a range of jobs that aren’t included in the reviews on this site

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Kevin on 22/2/2018

Malcolm and Ellis have been amazing, Having started to lose the will to live with countless unreliable and un-contactable builders that promised everything but delivered nothing, Malcolm has come through and done everything he said he would, communicated everything throughout the entire job and came back to me whenever I had questions. Great service, especially given the previous experiences I had. I now have an open plan diner/kitchen with a fantastic new kitchen. Have & would recommend. Thanks Malc

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by bryan on 15/12/2008

Still awaiting Invoice, job done well and quickly

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Hannah on 11/5/2015

Marbuild started off by fixing and replacing floorboards in our house but we were so impressed we called them back to take out or old and fit our new kitchen and convert our hallway to being longer. Our next door neighbours even ended up using them to do their hallway too. They are very reliable, punctual, friendly and got the job done as quickly as they can and go the extra mile by asking questions all the time to make sure what we were going to get is what we wanted. Would highly recommend them.

All aspect of ground works- specialise in all garden work including redesign, turfing, artificial grass, patios and paving, driveways, summer houses and fencing. General building works including - Bathroom refurbishments ,Kitchens installations, Full refurbishments and renovations Plumbing and heating ,Tiling ,Flooring Plastering ,Decoration .All aspect of work undertaken both small and large.Reliable prices,always happy to help.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Maureen on 14/8/2021

Chris and Kamil worked tirelessly in all weathers to achieve an excellent result. They were polite, tidy and quiet workers, and very friendly. Would definitely recommend them.

I have 16 years experience with all building and landscaping works. I am a City and Guilds qualified plasterer. Spent beginning of my career assessing and carrying out damp proofing, then learnt and carried out work in all different trades whilst contracting for Westminster council. All my work is carried out to the highest standard and will not leave the job until customer is happy. I only take on one project at a time, thus being able to give ultimate service. Fully insured up to £5 million My services: Extensions Refurbishments Conversions Plastering Damp proofing Driveways Patios Garden walls Fencing Turfing Artificial grass Decorating Tiling Handyman service Groundwork’s Flooring

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Peter on 5/4/2023

Communicated well, completed the job to a high standard within the quoted timeframe and left the room clear and tidy after the work was done. Explained things clearly, gave me some useful advice about redecorating and was an all-round nice guy with professional attitude.

Whatever the demands of your refurbishment project, Progressive Design London has the full palette of professional building services to help you meet and then surpass your expectations. If you are looking to fit out your current property, or are considering investing in somewhere new with an eye to redevelopment,we can be your expert partner through every phase of the project. Adding value to your property is not something that can only be measured in house prices. Complete refurbishment represents a rare chance to set up a property exactly as you would like it and you will want to make sure you have expert advice to make the very most of such an opportunity. We can help with the development of plans and design ideas, with issues of building regulations and planning permission and the complexities of external decoration, roofing, glazing, conversions and extensions. We can also take care of all your re-wiring, plumbing and heating requirements, fit your kitchens and bathrooms, and set our expert team to work on the bespoke joinery, cornicing and interior decoration that will add the final touches to a home of enviable quality. At, Progressive Design, we set ourselves the very highest standards, not just on craftsmanship, but also in terms of meeting deadlines and budget requirements. If your project involves a listed or period building, we will relish the opportunity to conduct the structural and aesthetic repairs while staying perfectly true to the original stone, brick and woodwork, and any other features that make your property so special.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Fabio on 9/8/2015

In a nutshell, Marius and his team are great. They're kind, respectful and Marius is always available to answer every question you have - he def is the most knowledgeable builder I've spoken to. You get a very transparent estimate and sign a contract, for both parties' peace of mind. If extras come up, Marius openly discuss them with you before taking any action - my job required quite a few and Marius was also great to stay competitive price-wise whilst keeping the quality of the work sky-high.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by kayvon on 9/9/2011

Damion from swift & neatmuilttrader ltd was fantastic!! he came & viewed the chimney, gave me a very reasonable quote, also didn't make a fuss as some other roofers did!! did the work in under 30min.. excellent job, he very professional. will be using him again on other bits around the house! 5 Star.

citybrick avatar

citybrick

Cellar & Basement Conversion

Fast, professional, reliable and highly experienced. Citybrick covers all London, we deal with all of your maintenance problems.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Ali on 24/5/2019

Great job, great communication, helpful, friendly and listened to what I wanted. Would definitely recommend.

We are a construction company that provides all aspects of building works from house extensions to simple electrics. We work within Herts, Beds and Bucks and are based in letchworth . I am a fully qualified NIC electrician and have 15 years experience in construction.

Latest homeowner review
full starfull starfull starfull starfull star
Reviewed by Rebecca on 21/10/2020

We were hugely impressed by Courtney and his team. Everything came out on budget, and they were fast, reliable, and left the house clean and in order each day. Very nice people to work with, and can't recommend them highly enough. We are using his team again for an additional extension.

Post your job for free

app-icon

Get our app for homeowners

  • Send messages and get notifications from tradespeople
  • Add photos to get more accurate quotes
  • View tradespeople's profiles