The quick way to find a local Cellar & Basement Conversion specialist in Valley
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 homeowners, thousands of success stories
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.
Pro Master Gecko is a London based damp proofing specialist, delivering expert diagnosis and long term solutions for damp, condensation, and moisture related issues across residential and commercial properties. We focus on identifying and resolving the root cause of damp, including rising damp, penetrating damp, and condensation. Our work is based on proper assessment, ensuring the correct treatment is applied from the start not guesswork. Whether you’re dealing with damp walls, mould, or ongoing moisture problems, we provide reliable, high quality solutions across London. Our core services include damp proofing, damp inspections, DPC injection, condensation control, mould treatment, and structural waterproofing/tanking systems. We also carry out specialist plastering works including damp resistant replastering, lime plastering, and decorative finishes, along with external rendering and repairs to prevent water ingress. With a strong reputation built on quality and consistency, over 65% of our work comes from returning customers and referrals. We are fully insured and committed to delivering a professional, reliable service with transparent and competitive pricing. Works undertaken: Damp Proofing (Rising Damp Treatment & DPC Injection) Damp inspections & Moisture Diagnosis Penetrating Damp & External Repairs Condensation Control & Ventilation Solutions Mould Treatment & Prevention Basement Waterproofing & Tanking Plastering & Damp Resistant Replastering Lime Plastering & Breathable Finishes Painting & Decoration Soundproofing Water Damaged Ceiling Repairs External Sand & Cement Rendering Silicone Render / K-Rend Polished Plastering General Building Works All work is completed to a high professional standard with attention to detail and long term performance in mind. City & Guilds Certified Safeguard Europe Damp Proofing Accredited K Rend Approved Applicator Fully Insured
The work completely was of a very high standard with immaculate attention to details. Jerry was punctual from the survey stage to the end of the work. He sorted little snags with the wall, separated the work area with a plastic sheet so the dust was minimised. After each day, my home was left clean and the job was progressing well. The end result looks great and no issues so far. I would recommend them 100%
'%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}
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!
Adrian and his team met or exceeded my expectations, always willing to match my needs and finished the job on time and within budget.
S-MUNTEAN COMMUNICATION LTD
Cellar & Basement Conversion
Young team with great goals!
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!
Great job and would definitely rate it higher if I could. Will keep in mind if I need other jobs done around the house.
Castle Wren are a progressive and versatile construction business. Operating from the heart of Bishops Stortford on the Herts and Essex border, we work across the Home Counties, London and East Anglia. We continually strive to maintain our strong reputation for quality, and we have long standing partnerships with many of our clients with much of our work being repeat business. Our experienced and dedicated team cover all types of projects ranging from demolition and site clearance to new build housing schemes, commercial buildings or refurbishment projects. Private clients are an important part of our business, and we work with customers to bring their dreams to life, be that with a new extension, landscaping and garden transformations, patios and driveways or the end to end delivery of a new home. We have deep specialisms in demolition, groundworks, earthworks, and civil engineering projects and work with a wide range of clients, from private customers to national developers and housebuilders.
After visiting my property, I was initially impressed by the gentleman who promised to quote, but have since heard nothing, in spite of more than one request to get back to me. Very disappointed
A1 construction & Maintenance
Cellar & Basement Conversion
RAILEM BUILDING CONSTRUCTION LTD
Cellar & Basement Conversion
Railem Building Construction With over 15 years of experience, Railem Building Construction specialises in house extensions and private residential projects. We work closely with homeowners to deliver high-quality results, from planning to completion. Our specialities include house extensions, plastering, rendering, tiling, drylining, partitions, MF ceilings, and full property renovations. We also provide electrical and plumbing works, offering a complete, hassle-free service for private clients. Our team is fully trained and highly experienced, with a strong background gained from both private residential projects and large commercial developments, including stadiums and apartment blocks. This experience allows us to bring professional standards, attention to detail, and reliable workmanship to every home we work on. We pride ourselves on quality, clear communication, and completing projects on time and within budget.
Sparkle Spray
Cellar & Basement Conversion
Sparkle spray Jet Washing – Professional Exterior Cleaning Services We are your local expert jet washing and pressure cleaning specialists, serving kent and surrounding areas. Whether you need your driveway, patio, paths, decking, walls, fences, or exterior building surfaces cleaned — we have the right equipment and experience to get the job done perfectly. We use high-powered, professional jet wash systems that safely remove dirt, moss, algae, oil stains, grime, and weathering, restoring your surfaces to their original clean, bright condition. We treat every property with care, use safe cleaning methods, and leave your property spotless when we finish. ✅ Driveway & patio cleaning & sealing ✅ Paths, steps & paving ✅ Decking & fencing cleaning ✅ Brickwork, walls & render cleaning ✅ Oil stain removal ✅ Fully insured | Reliable | Local | Free quotes Our promise: We don’t just wash — we make it shine.
PEARL & CO TRADING LTD
Cellar & Basement Conversion
We have over 20 years experience in domestic and commercial building work. We do all sorts of decorating, tiling and plastering work, kitchen and bathroom fitting, fully refurbishments, extensions, loft and basement conversions.
Silvio and team did a fantastic job installing my new kitchen. From helping with the design, to recommending more efficient plumbing work to make everything fit properly, the process was seamless from start to finish. Catalin is extremely skilled and I was impressed by his efficiency and the quality of his work and the others who assisted. Would 100% recommend Star Construction to others.
Our team of building professionals offers a solution for all of your building related needs. Whether its kitchen or bathroom installation or even something much smaller, we have the experience & personnel to provide the highest quality work.
Stanley & his team originally came on board to build us a new rear extension which would house our kitchen as well as fit a new bathroom but as the project developed it ended up being near enough an entire house renovation and we're thrilled with the results. We still have work we would like to do to the outside of the house as well as a loft conversion and when we have enough money to take on those projects, we would definitely re-hire Stanley and his team. Highly recommend Stanley & his team.
Rated People Ltd
Cellar & Basement Conversion
Castle Interiors take great pride in all of our work, we will go the extra mile to make sure you get the perfect finish and quality look that your after we take great care of our customers by helping them design and using their ideas to make a perfect home for them. We also offer an amazing discount scheme for new and regular customers also seasonal deals that are amazing and won't find anywhere else. We are a one stop shop Try us and you'll be amazed by the quality of work.
Was always punctual and did the job to my satisfaction.
Toma Lup
Cellar & Basement Conversion
We are a small group of professional builders with 15 years experience specialized in building and refurbishment properties for people that don’t want a lot of hassle and headache when dealing with builders, so we are providing all the services from start to finish and ensure everything is done to high standards while keeping the client satisfied on the price.
With over 20 years of experience in construction we want to get your project from conception to completion. Fast, trustworthy and efficient.
Absolutely amazing tradesmen with very competitive pricing. transformed my 50m2 Driveway by tilling and installing aco floor drainage, great attention to detail and great finished product. Very highly recommended and definitely will have them returning for more work.
We are an experienced team that specialize in all types of home improvements. We are friendly and professional and work to extremely high standards. Please do not hesitate to ask any questions you may have.
Great job, friendly and honest contractors
We are proud to be a top rated, reliable and well respected company with a fantastic team of experts providing outstanding levels of service when it comes to plumbing painting tiling bathroom and kitchen fitting and full house renovations in London and surrounding areas. We carry out all types of work, no matter the size - from small plumbing maintenance jobs such as leaking taps or burst pipes and other domestic work, right up to large installations such as Full house renovation. All of our work is fully guaranteed and we offer professional and efficient Handyman services near you at a competitive cost. Our aim is total customer satisfaction. Not only do we retain our client's custom over many years, they also become our ambassadors recommending us to their relatives, friends, neighbours and business associates.
Shout out to my brother from another mother. Pleasure having Nik and his boys Ray, Rod and John working on this project. Sometimes in life you have to take a leap of faith and Nik has 100% restored that faith with extreme commitment and professionalism on top of a beautiful finish.
As a building We strive to make customers happy ur work speaks for itself we trie to offer all our clients the best advice and services all or callout are absolutely free advice and we do not charge for inspections this is just another way to give ? people peace of mind To choose GJ building solutions?
James and Andy provided excellent advice and did a great job. The job revealed some extra work was needed but the changes were all discussed and agreed without pressure before being implemented and James was able to bring in extra team members whilst on site so the work was completed in a timely fashion. All of the team were personable and a pleasure to have on site.
We are family run small construction business and proudly operating in South London for last 10 years. We specialize in a complete range of house renovation, refurbishment, maintenance and house extension services. We have an expert highly skilled team with extensive experience to achieve high standards on all of our projects. We work tirelessly to achieve the best results for our clients and have uncompromising commitment to customer satisfaction.
AVOID Adil is a smooth talker who hasn't got a clue about work in the industry. Employed to refurbish a full house. A SUMMARY of issues follows. 1 - Plastering done is uneven. 2 - Did not allow plaster to dry before painting walls so already peeling off. 3 - Found number of areas where holes had been left, and had these not been pointed out would have been left. 4 - Wood not sanded before painting, incl. new skirting boards. 5 - Threats when I refused to pay!
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.
'%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