The quick way to find a local Cellar & Basement Conversion specialist in Harringay
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.
'%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}
Instead of hiring and dealing with multiple people, let us handle the hassle out on your behalf! One deal, one man! My name is Behrooz, and I have 14 years' experience in building and carpentery works. We specialize in renovation and refurbishment of commercial and residential properties at the best quality and price using the best professional tools. We take serious pride in all our work. We also have a joinery factory in London. We manufacture any made-to-measure woodworking such as shop display and counters , kitchen units, wardrobes, TV stands, dining tables etc - you name it, we do it.
Behrooz and his team installed engineered wood from the Colour Flooring Company in my property over several days. Behrooz and his team did a careful, high quality job with good attention to detail. The property is Georgian and had some tricky areas to navigate, which I was consulted on when we needed a discussion. The quote for the work was fair and the team took care to tidy up thoroughly. Lots of flexibility shown at all points. Recommended.
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.
At O.B.Build we want to make your home look amazing inside or outside.We take pride in our work and can handle any job or task.We are clean tidy, polite and always deliver a quality finish.
Brilliant refurb of 2 bedroom flat, timelines were tight but John delivered to great standards on time! Job included damp control, relaying floors, and painting/redecorating. Would highly recommend. Thank you John!
Experience in: Tiling Plastering Painting Laminating Bathrooms Roofing Block paving Brick work Garage conversion Extension Mould Treatment END MORE
AD Property Maintenance Services Ltd is a modern, client-focused property maintenance company based in Central London. We specialise in high-quality handyman work, painting and decorating, deep cleaning, Venetian plaster and microcement finishes, removals, and general refurbishment services. What sets us apart? We're reliable, responsive, and transparent. Our team of trusted professionals and subcontractors deliver work with precision, care, and pride — whether it’s a small repair or a full property refresh. We don’t charge VAT, offer competitive pricing, and work weekends to fit your schedule. Backed by strong reviews and partnerships with estate agencies and commercial clients, we’re here to raise the standard — one job at a time.
Hi I’m Jason p & Darren c Been a master builders for 25+ years worked on grade A listed building to flats cottages semi detached bungalow any building works all come with the standard 7 year guarantee, I’m professional clean tidy tradesman that can put our hand to all trades except electrical & plumbing Customers paramount as word & mouth is very important in the building industry , punctual and always at the end of the phone if needed trust is a big factor also for both the tradesman & the client working relationships work brilliantly, Carpentry work , painting & decorating , rising damp & penetrative damp works , gutter facia eaves installation , cleaning gutters removals everything covered to the highest possible standard achievable Pls allow me to work on your property and showcase my skills many thanks Jason p & Darren c no payments ever made until works completed .
Darren did excellent work . Very friendly person , we highly recommend him
J4H Civil Engineering Ltd is a trusted company providing a range of property maintenance and home improvements for domestic and industrial customers in Feltham, Middlesex, West London, and the surrounding areas.
Delighted with the service received from this company. Completed the job to quoted budget and well within the maximum timeframe quoted including doing some extra work (painting hallways, replacing spotlights) that weren't in the original job. Everything looks really good, and I wouldn't hesitate to recommend them.
Expert Damp Proofing & Property Preservation Services Home Building & Surveying Company is a leading provider of damp proofing, wall coatings, and property preservation services across the UK. With over a decade of experience, we specialise in protecting residential and commercial properties from moisture damage, mould growth, structural decay, and woodworm infestations. Our team of certified professionals ensures every project is completed with precision, using cutting-edge techniques and high-quality materials to enhance your property’s durability, appearance, and value. Why Choose Home Building & Surveying Company? - Over 10 Years of Industry Experience - Certified Damp Proofing Specialists - Tailored Solutions for Homes & Businesses - Guaranteed Long-Lasting Results - Competitive Pricing & Free Consultations Comprehensive Property Protection Services 1. Damp Proofing Solutions Moisture can cause severe damage to your property, leading to mould, decay, and structural instability. Our damp proofing services prevent water ingress and rising damp, ensuring a dry, healthy indoor environment. 2. External Wall Coatings Enhance and protect your home’s exterior with our advanced wall coatings. These weatherproof solutions defend against harsh UK weather, preventing cracks, damp penetration, and fading while improving kerb appeal. 3. Basement Waterproofing & Tanking We offer expert basement tanking services to prevent water damage and create dry, usable underground spaces. Whether converting a basement or preventing flooding, our waterproofing solutions provide peace of mind. 4. Mould Removal & Prevention Mould not only affects property aesthetics but also poses health risks. Our mould remediation services eliminate mould growth and prevent future infestations, ensuring a safer and cleaner living space. 5. Woodworm Treatment & Prevention Protect wooden structures from decay with our specialised woodworm treatment services. We use industry-approved solutions to eliminate infestations and prevent future damage to beams, flooring, and furniture. 6. Condensation Control Solutions Excess condensation can lead to damp walls, peeling paint, and mould growth. Our ventilation and insulation solutions help regulate indoor humidity, creating a more comfortable and damage-free environment. At Home Building & Surveying, we are committed to protecting and enhancing your home or business with industry-leading damp proofing and property preservation services.
Ian came round to take a look at a damp patch that had started showing up on one of the utility room walls. He turned up on time, was really friendly, and clearly knew what he was talking about. He gave everything a proper check over and explained what was likely going on in a way that actually made sense. He didn’t try to make a mountain out of a molehill or push for any unnecessary work—just gave honest, practical advice on what to do next. Really appreciated how straightforward and helpful he was. Would
Welcome to Sparks fabrication where we combine over 15 years of industry expertise with a commitment to exceptional customer service. We provide free quotations, ensuring transparency and informed decision-making for all projects. Our focus on reliability, trustworthiness, and quality of work sets us apart, with references available to attest to our dedication. Specializing in grills, gates, railings, bespoke furniture, staircases, mezzanine floors, and more, we pride ourselves on bringing your vision to life. Contact us today to experience craftsmanship and service of the highest standard.
Reliable and excellent work.
Our building services company RMR Building & Renovation Ltd has over 15 years’ experience in the industry. We have been helping customers in London/Essex and the surrounding 10-mile radius by providing professional, trustworthy building services. We know it can be hard to find a builder that you can rely on. RMR Building & Renovation Ltd has a wealth of experience and is known as one of the best builders in Essex. We pride ourselves on providing a professional, caring and high-quality service and always meet our customers’ needs. Each contractor that works for RMR Building & Renovation Ltd is fully qualified and insured and delivers on timekeeping, quality of work and value. We offer a full range of building services, from major rebuilds to smaller jobs such as masonry repairs, including: New Builds Alterations, Extensions & Conversions Brickwork Concrete Plastering & Screeding Tiling Painting & Decorating Kitchens & Bathrooms Roofing Services Re-pointing Septic Tanks Excavation Services Soakaways Foundations External Works Drainage If you are trying to find a builder near you, why not give us a call? Our friendly, professional team will be happy to talk through your needs and give you a free, no-obligation quote.
Professional, quality work,worth money
With over 10 years of experience in the field, our dedicated team specializes in a wide range of refurbishment projects. We take pride in transforming spaces, whether it's residential, commercial, or industrial, ensuring that every detail is meticulously attended to. Our expertise encompasses everything from interior renovations to exterior upgrades, allowing us to breathe new life into any environment. We are committed to delivering high-quality workmanship, utilizing the latest techniques and materials to achieve stunning results that meet our clients' needs and exceed their expectations.
Cosmin and team did an excellent job in my hallway and everything was finished to a very high standard. Highly recommended and would hire again
I am Edilson, a professional with more than 30+ years of experience in general construction. I am pride of myself on delivering high standard and honest work. My work rating can confirm it. We work as a family business and If you need anymore information do not hesitate in contacting us.
Edilson was very efficient, communicative, and clean during the job. He explained everything that he was doing, and made suggestions about how to make the most of the space we were using. He even did a few extra odd jobs for me at the last minute. I've now shared his details with all of my family, and they will be using him in the future. I definitely recommend!
Its quality time! With over 10 years experience, tens of finished jobs and tens of happy clients, I am a landscaper who can manage any job. Big or small, easy or complicated is never a problem for me. For any details don't hesitate to contact me.
Work that took place was amazing and recommend IA trader to anyone that needs work done.
Business established since 2008
A great company to deal with, prompt, reliable and very professional. We live in an old Victorian house with hardly a straight angle anywhere. So Anunas had a tricky job to do. The job was done perfectly and to agreed cost. I would recommend this builder to you. If I could could give give 6 stars I would. Great job well done.
Valentino has done a fantastic job of bathroom and kitchen refurbishment. He has delivered what he had promised no hidden charges and no false promises. Very reliable and soft spoken. He uses the best material in the market so quality of product is very good. He did the facia as well which is also of very good specifications. Overall he is a fantastic builder and I would 100% recommend him.
Quality Spec Building Service LTD
Cellar & Basement Conversion
At QSBS LTD, our name stands as a testament to our commitment to excellence and precision in the construction industry. Quality Spec Building Service encapsulates the core principles that drive our co mpany. QSBS Ltd is dedicated to transforming visions into reality. We understand that property design and construction is not just about creating physical spaces but about crafting environments where memories are made and moments are celebrated. Our mission is to breathe life into designs and functionality, providing spaces that are both beautiful and practical.
We at Ins Construction & Landscape pride ourselves on delivering exceptional construction and landscaping services across London and Kent. Our dedicated team of professionals is committed to transforming your visions into reality with precision and quality, ensuring each project is completed to the highest standard. Discover how our expertise can enhance your home or commercial space, providing aesthetically pleasing and functional environments tailored to your unique needs. Our Expert Services: - Domestic Construction Our domestic construction services are designed to create the perfect living spaces for families in London and beyond. With a focus on contemporary design and sustainable building practices, we ensure each project reflects the unique style and needs of our clients while adhering to the highest quality standards. - Landscape Design Our landscape design services offer innovative solutions to transform your outdoor spaces into captivating environments. From lush gardens to functional outdoor living areas, our expert designers will bring your vision to life, combining creativity with practicality to enhance your property's appeal. - Commercial Projects At Ins Construction & Landscape, we specialise in handling complex commercial projects with precision and expertise. Our team is equipped to manage everything from office builds to retail fit-outs, ensuring minimal disruption to your business while delivering projects on time and within budget.
Thank you Ionut and the team, im so happy to have a space where I can be proud of! I needed the existing paving slabs removed and to put in place decking, artifical grass, and planters put in. They provided the materials and kept me informed in the process. They are hardworking and I saw a huge difference for every day they came. Thank you once again for taking on this project, and I'm so happy this has all been done before summer has started! Would hire again!
General Builder And Tiling Master
Cellar & Basement Conversion
Full Refubishment cover 20 people We are a team of experienced tilers. We use to work for a big tiling company bares in Central London but decided is time to work for ourselves. We can do: -ceramics -porcelain -mosaics -victorian tiles -natural stone -LVT Also we can do all types of waterproofing systems for bathrooms or wet rooms. Our aim is to make clients happy. Let us prove it!!
R&B refurbishment ltd For a decade, a Proficiency building company based in London has led all aspects of construction, luxury design and build. Whether you're looking to expand or refine your home with a loft conversion, rear or side extension, basement excavation, cellar conversion or a top to bottom refurbishment, our ethos is quality-first craftsmanship for the very best in residential design and build in London. When it comes to the quality and care that we put into every project, we think of ourselves as one of the leading building companies in London. This means that, as the right builder, we have the team, the expertise and the commitment to a high quality that sets us apart. Fully insured with Public and Employers Liability, Professional Indemnity, Contractors All Risk and high-risk basement works. We offer a 15-year guarantee on all of our structural building work. Proficiency only uses the highest quality building materials ensuring everything is built to standard and will last.
Fired him for appalling work, no-shows and delays; see his other bad reviews. He's a middle man; does not do any work; got others to do it like a plumber, then a tiler the next day; slow work made worse when someone messed up or did not show up. Ali only shows to deliver materials or check work. Quick to reply when wanting the job. Slow/no response once job starts thinking you wont cancel. Materials I paid not returned; take every receipt and check you keep/use every item as he will even for wipes/tape
General builders
'%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