The quick way to find a local Cellar & Basement Conversion specialist in Underhill
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.
High Blue Builders
Cellar & Basement Conversion
High Blue Builders are a team of highly dedicated and experienced professionals with a passion for the built environment and a proven track record of delivering successful projects of various scales. Be it an extension, refurbishment or a large scale new build development, we take pride in delivering projects tailored precisely to match the vision of our clients. High Blue Builders have an in-house RIBA Chartered Architect who has vast experience in producing effective conceptual and detailed designs that are most likely to achieve planning consent. We can also take complete responsibility of your planning application and can provide insightful industry guidance to help you maximise the potential of your site. Furthermore, we are very experienced in engaging with local councils, Building Control (complying with building regs), party wall surveyors and managing stakeholders of sites such as neighbours and pedestrians. Our management ensures each project is delivered as smoothly and efficiently as possible. No project is too large or small for High Blue Builders and we strive to provide an outstanding quality of service at the most competitive rates.
We are an old established company based around south West London. We pride ourselves on the hopes and needs of our customers and are always open to fresh ideas to complete the project on budget and cost Regards Danny Richard Palace builders
Danny did an excellent job of repairing our garden wall which had developed a massive crack around a boiler enclosure. He also liaised with our tenants and neighbour ensuring the works went as smoothly as possible. I will be using him again if I have any more work for him.
Best Home Builders Ltd is a limited company with a professional and experienced team. With more than 14 years experience, we deliver excellent, high quality services like loft conversions, bathroom/kitchen planning and fitting, painting & decorating, plastering, rendering, tiling, dry lining & a lot more. We also collaborate with a plumber, a certified electrician and gas engineer, who can provide all necessary certificates.
Big John very helpful fellow.
C & N Constructions is a well-established company offering construction and landscaping services for both residential and commercial clients. Our faith: We believe in open and honest communication and shared goals which will generate greater continuity in workload and thereby provide sustained improvements in quality, efficiency & delivery. Our mission: To safely deliver any project, any time, in any environment for the benefit of our customers, shareholders, employees and the communities we serve. Company vision: C&N Constructions is committed to building long-term relationships based on integrity, performance, value, and client satisfaction. We will continue to meet the changing needs of our clients with our quality services delivered by the most qualified people. Get in touch and we can start asap! We offer free and no obligation project estimate.
The job was to cut back a severely overgrown patch of garden. Chris & his team, Adrian & Cosmin, gave me a competitive quote, after coming to visit the site to assess what needed to be done. They started next day and completed the job quickly and to my complete satisfaction. The site was cleaned up & all waste taken away. I will definitely use them again and strongly recommend them.
Founded in 2025, Bfix has established itself as a leader in luxury construction and interior design. Like a hive of diligent bees, our team works tirelessly to turn dreams into reality, creating spaces that are not only beautiful but also built to last. We pride ourselves on our ability to deliver superior craftsmanship and exceptional service. What We Offer Free On-Site Inspection – We carry out a full technical assessment to identify damage to floors, ceilings, walls, and fixtures. Trace & Access Support – We assist in locating hidden leaks and identifying areas affected by moisture. Repair Planning – We help outline the works required for restoration, based on what insurers typically expect to see. Supportive Documentation – We provide clear, itemised findings that you can use if you choose to start an insurance claim. Referral to Insurance Claim Experts – If required, we can introduce you to regulated professionals who manage claims directly on your behalf. Why Choose Bfix? Unmatched Expertise: Over many years of experience in luxury construction. Tailored Solutions: Custom designs that cater to your specific needs. Superior Quality: Premium materials and meticulous craftsmanship. Customer Satisfaction: We prioritize your vision and ensure a seamless construction process.
A professional team of general builders who specialise in bathroom & kitchen makeovers. All our work is completed to very high standards. Portfolio & client references available upon request.
Aubrey Construction & Maintenance
Cellar & Basement Conversion
We are a small family run business, established in 1989 in honour of our late mother, Audrey. With decades of experience, we take pride in delivering high-quality workmanship in all types of construction work; new builds, refurbishment, extensions, garage & loft conversions, patio/driveway cleaning & repointing. Every project treated with care and professionalism no matter the size.
We are North London Based Building Company offering the following services: Carpentry/Joinery,Painting/Decorating,General Builduing work. Our motto is : ALWAYS AIM FOR PERFECTION
Zoltan was great. He took the time to design and plan with us, had a lot of patience for working out the detail... he was very clear in giving us timing brackets and delivering within that time. He loves what he does, and that is very visible in the quality of the carpentry and joinery he delivers. We would definitely recommend him to anyone as we are very happy with the results.
S 2 PROPERTY SOLUTIONS
Cellar & Basement Conversion
With 15 years of experience we are a small building firm which values customer satisfaction above all else. We specialise in bifold installations, double glazing installations, repairs and finish carpentry. Our experienced team is able to fulfil all of your domestic requirements, from painting your home to complete extensions and renovations.
Hatch End Builders is a small professional company with Experience of twenty year in the Building Industry mainly internal refurbishment all our jobs are high end properties in London working with great designers.Our aim is having a Happy costumer at all time .
Bujar was very prompt in response to my initial posting, calling to assess the job within a day and then confirming a start date for the work. He and his team did an excellent job on the hall tiling and also managing the cloakroom plumbing ( moving a sink and toilet) to complete the tiling here. I would highly recommend him and his team for doing a great job.
We are a professional renovation company that specialises in home renovations
I was very satisfied with the results of VFurb's external renovation and decoration work, which took 3 weeks in total, extended due to rain. Dragos worked six days a week to keep me informed of progress, answered all my questions, and identified practical solutions to unforeseen problems, supported by detailed costings . He was always present to supervise his team of 2-4 workers, and personally completed the most complex roofing, piping and guttering jobs himself to a high standard.
Derick's Home Improvements
Cellar & Basement Conversion
I prioritise in providing a good quality bespoke service for customers. I have more than 30 years experience in the business with a large clientele. I specialise in home renovations, no job is too big.
PAWEL ZAMOSNY
Cellar & Basement Conversion
Simicus Construction LTD
Cellar & Basement Conversion
This is Simicus Construction Ltd, we are a team of builders with over 20 years of experience in the Construction Industry.
'%3e%3cpath%20fill-rule='evenodd'%20clip-rule='evenodd'%20d='M12.5%2020.392a1%201%200%2001-.54.888l-5.274%202.73a1%201%200%2001-1.435-1.109l1.494-6.588a1%201%200%2000-.306-.964l-4.723-4.254c-.65-.586-.287-1.666.585-1.74l6.105-.514a1%201%200%2000.846-.629L12.5%200v20.392z'%20fill='%23F7DB34'%20/%3e%3c/g%3e%3c/svg%3e){kind=small}
All work undertaken. Garage conversions, extension, kitchen and bathroom fitting , tiling, plumbing, electric, painting and decorating.
Grigore
Cellar & Basement Conversion
Grigore is your all-in-one building specialist, offering complete services from start to finish. Whether you’re building a new house from the ground up or need expert help with plumbing, bathroom fitting, electrics, or general renovations — we do it all. With a strong focus on quality, reliability, and craftsmanship, Grigore handles every aspect of construction with professionalism and care. No job is too big or too small — from full builds to the smallest details, we’re here to get it done right. Grigore – Skilled. Trusted. Complete Building Services.
We are a small family run business with around 30 yrs of experience in many areas of construction and landscaping, I completed my city and guilds in carpentry and joinery, what seems like a lifetime ago. And have gone into general building as an overall now. Many thanks
Based in Colchester, OMP Building Services Limited is a reputable and reliable bricklaying company with unrivalled expertise in the industry.
Oliver visited me to talk about the design I wanted for the new wall. He got an idea of how I would like it and was very helpful with any questions during his visit. The team of Leon, Lee and Will were very good. Leon made sure that everyone knew what was agreed. Do the job they made sure I was happy with the work. They were all very easy to get on with and worked well as a team. They left the site nice and tidy at the end. I'm very happy with the work. Definitely 5 stars. Cheers guys Kevin
Robert Build Limited is a reliable and professional building company based in the UK, specialising in residential construction and renovation works. We are committed to delivering high-quality workmanship, clear communication, and projects completed on time and within agreed budgets. With hands-on experience in the building industry, we offer a wide range of services, from small repair jobs to full property renovations. Every project is approached with attention to detail, respect for the client’s home, and a strong focus on customer satisfaction. Our services include: • General building and renovation works • Property refurbishments • Interior and exterior finishes • Repairs, maintenance, and improvement projects At Robert Build Limited, we take pride in providing durable, well-finished results using quality materials and proven techniques. Our goal is to build long-term relationships with our clients through honest pricing, professional conduct, and consistently high standards of work.
Full home renovation expertise from building an extension to tap replacement. Electrical works, carpentry, Laminate/Carpet flooring, Bath installation, Kitchen installation, Interior/exterior design!! The ultimate damp proofing solution, using a cutting edge technology that allows walls to be protected from water ingress remaining its full strength and breathiness. Enjoy unusual projects that requires creative mind. If something seems complicated let us know we like complicated projects. Over 20 years experience with some of the most unusually creative projects help clients to improve and build their homes. We are a team professionally organised builders. Our team members experience vary from as low as one year experience for an apprentice to as high as 40 years engineering experience for experts.
The guys did a great job, high attention to detail, care not to make a mess, and provided creative solutions to both projects. Highly recommended!
'%20rx='20'%20/%3e%3cg%20fill='%23FFF'%3e%3cpath%20d='M29.376%2016.914c-.555%200-1.006.454-1.006%201.013v37.416c0%20.578.472%201.014%201.097%201.014h34.109a1.007%201.007%200%200%200%20.972-.83%201.012%201.012%200%200%200-.161-.76l-6.446-9.416c-.375-.548-.567-1.085-.586-1.642-.034-.977.516-1.952%201.402-2.483%204.8-2.878%205.808-7.575%205.808-11.009%200-7.335-5.925-13.303-13.207-13.303H29.376ZM63.594%2059.75H29.467c-2.505%200-4.467-1.936-4.467-4.408V17.927c0-2.43%201.963-4.408%204.376-4.408h21.982c9.14%200%2016.577%207.49%2016.577%2016.698%200%205.879-2.46%2010.687-6.944%2013.607l6.17%209.017c1.37%202.002.868%204.752-1.12%206.132a4.336%204.336%200%200%201-2.44.778h-.007Z'%20/%3e%3cpath%20d='M38.767%2027.797c0-.749.603-1.357%201.347-1.357h6.427c3.979%200%206.426%201.72%206.426%205.099v.123c0%203.132-2.325%205.098-6.365%205.098h-3.848l-3.985%203.998V36.76h-.002v-8.963'%20/%3e%3c/g%3e%3cpath%20fill='%23FFF'%20fill-rule='nonzero'%20d='M18.176%2069.2h2.156v3.878h3.976V69.2h2.156V79h-2.156v-3.934h-3.976V79h-2.156v-9.8Zm16.428%207.98c.43%200%20.826-.08%201.19-.238a2.72%202.72%200%200%200%20.931-.658c.257-.28.457-.604.602-.973a3.21%203.21%200%200%200%20.217-1.183V74.1c0-.42-.072-.817-.217-1.19-.145-.373-.35-.7-.616-.98a2.96%202.96%200%200%200-.945-.665%202.873%202.873%200%200%200-1.19-.245c-.439%200-.838.08-1.197.238-.36.159-.667.378-.924.658s-.457.604-.602.973a3.21%203.21%200%200%200-.217%201.183v.028c0%20.42.072.817.217%201.19a2.959%202.959%200%200%200%201.554%201.645c.36.163.758.245%201.197.245Zm-.028%201.988a5.343%205.343%200%200%201-2.086-.399%205.187%205.187%200%200%201-1.645-1.078%204.823%204.823%200%200%201-1.078-1.596%205.029%205.029%200%200%201-.385-1.967V74.1c0-.7.13-1.356.392-1.967a5.075%205.075%200%200%201%201.085-1.61%205.05%205.05%200%200%201%201.652-1.092%205.395%205.395%200%200%201%202.093-.399c.756%200%201.451.133%202.086.399a5.187%205.187%200%200%201%201.645%201.078c.462.453.821.985%201.078%201.596.257.611.385%201.267.385%201.967v.028c0%20.7-.13%201.356-.392%201.967a5.075%205.075%200%200%201-1.085%201.61%205.05%205.05%200%200%201-1.652%201.092%205.395%205.395%200%200%201-2.093.399Zm8.14-9.968h2.324l2.576%204.144%202.576-4.144h2.324V79h-2.142v-6.398l-2.758%204.186h-.056l-2.73-4.144V79h-2.114v-9.8Zm13.152%200h7.392v1.918h-5.25v1.988h4.62v1.918h-4.62v2.058h5.32V79h-7.462v-9.8Zm13.866%209.94a6.49%206.49%200%200%201-2.198-.385%205.817%205.817%200%200%201-1.96-1.183l1.274-1.526c.448.364.908.653%201.379.868.471.215.987.322%201.547.322.448%200%20.796-.082%201.043-.245a.771.771%200%200%200%20.371-.679v-.028a.85.85%200%200%200-.077-.371.778.778%200%200%200-.294-.301%203.079%203.079%200%200%200-.602-.28c-.257-.093-.59-.191-1.001-.294a12.201%2012.201%200%200%201-1.344-.406%203.787%203.787%200%200%201-1.022-.553%202.237%202.237%200%200%201-.651-.819c-.154-.327-.231-.733-.231-1.218v-.028c0-.448.084-.852.252-1.211.168-.36.404-.67.707-.931a3.183%203.183%200%200%201%201.085-.602c.42-.14.882-.21%201.386-.21a5.86%205.86%200%200%201%201.981.322%205.743%205.743%200%200%201%201.659.924l-1.12%201.624a7.1%207.1%200%200%200-1.288-.707%203.292%203.292%200%200%200-1.26-.259c-.42%200-.735.082-.945.245-.21.163-.315.366-.315.609v.028c0%20.159.03.296.091.413.06.117.17.222.329.315s.376.182.651.266c.275.084.623.182%201.043.294.495.13.936.278%201.323.441.387.163.714.36.98.588.266.229.467.497.602.805.135.308.203.677.203%201.106v.028c0%20.485-.089.917-.266%201.295a2.66%202.66%200%200%201-.742.952%203.353%203.353%200%200%201-1.134.588%204.924%204.924%200%200%201-1.456.203Z'%20/%3e%3c/g%3e%3c/svg%3e)
Get our app for homeowners
- Send messages and get notifications from tradespeople
- Add photos to get more accurate quotes
- View tradespeople's profiles