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Find Local Basement Conversion Company Near Me in Alton, Hampshire

There are 446 Cellar & Basement Conversion specialists in Alton, and last month we helped homeowners get quotes for their home improvement jobs.

Browse Cellar & Basement Conversion specialists in Alton, Hampshire

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C Marks Construction

Cellar & Basement Conversion in Alton

C. Marks Construction is based in Portsmouth, Hampshire and is a professional and reliable building company with over 30 years of experience. OFFERING and friendly service. You can be assured of a reliable, quality service, on budget & on time.

Latest homeowner review

Reviewed by Elizabeth on 12/6/2015

Brilliant work, great guys, we are so pleased with the whole process which we understand is unusual at the end of a large loft conversion project! Chris was friendly, always kept us in the loop, kept a tidy site and ran to budget and timescale pretty much! Have been recommending to friends and family already! Thank you Chris!

Oliver Deyoung

Cellar & Basement Conversion in Alton

(104) Read reviews

"with 20+ yrs of experience I pride myself on delivering high quality maintenance projects on time and within budget. Contact me today and see how i can help you to complete your projects as you imagine, regardless of size big or small"

Latest homeowner review

Reviewed by Moira on 18/3/2025

All Aspects of Painting and Decorating ,Building Works, Small or Large, Extensions, Conversions, Garage Conversions. Landscaping and Fencing Works.

Latest homeowner review

Reviewed by Nicholas on 24/8/2016

All good

Here at Ironwood Carpentry & Joinery we aim to provide a friendly professional service always striving to deliver the highest quality to our customers. We specialise in 1st and 2nd fix carpentry but also do kitchens, renovation work and garden structures.

Latest homeowner review

Reviewed by Lisa on 5/2/2017

Thank you for helping us! It works perfectly :)

All aspects of building work undertaken 20 years experience

Latest homeowner review

Reviewed by Adam on 10/4/2025

Liam and his team at LTR were very clear in their communication, pricing, and the work carried out to a high standard of professional service. I will be using them again, and I would recommend them.

JH BUILD

Cellar & Basement Conversion in Alton

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

self employed

Cellar & Basement Conversion in Alton

Hi im Russell, I joined rated people 7 years ago. I am honest ,hard working and a very reliable person who takes alot of pride in my work.If im lucky enough to win your job,im sure that u will be happy with my work.

Latest homeowner review

Reviewed by Jamie on 26/7/2021

Russell did a great job, quick and at a good price.

Specialising in bathroom fitting we cover all aspects of home renovations down to the smallest of maintenance and repairs. Clean, and affordable we have a small team of professional builders who are dedicated to ensuring you are completely happy and comfortable in your home. From plumbing, electrics and carpentry, to plastering, tiling and painting and decorating, there’s no need to look any further.

Latest homeowner review

Reviewed by Celso on 5/2/2023

Great turn arround, fair budget, great service.. Strongly recommend..

Greenvilla Plumbing

Cellar & Basement Conversion in Alton

Greenvillaplumbing, plumbing & heating services, was created over 15 years ago to deliver the kind of service you should expect from any professional plumbing and heating company in London. We pride ourselves on offering a 1st class service to our customers at all times from the initial call to our telephone operative to diagnosing the fault and providing a solution. We will simply never do work that does not need doing and offer an excellent plumbing & heating service at an affordable rate. Many of our customers have been with us years and time and time again recommend friends and colleagues to us.

Latest homeowner review

Reviewed by Moses on 7/7/2025

Very good attitude and workmanship

bs building service

Cellar & Basement Conversion in Alton

B S Building Services

Latest homeowner review

Reviewed by Mick on 27/7/2025

Bartek arrived promptly explained what we needed doing took pictures Recieved a quote from him happy with everything 2 weeks later on Sat morning arrived completed work's exactly what we wanted proficient and cleaned totally when finished would 100% hire him again

Bathroom fitter kitchen fitter General builder no job to small Your home respect always In trade 30 years learned on jobs as a young man older wiser professional work with pride

Latest homeowner review

Reviewed by Terry on 18/9/2024

Derek contacted me straight away to arrange a visit and quote. Straight away Derek’s presentation and attention to detail pleased me. This project was to update my mother in laws downstairs shower room, Derek recommended a retail outlet for the equipment with assistance over choices. We chose and accepted his quote, which included dismantling the existing fixtures and some build parts of the cramped room. All waste was removed, the project was completed 100% in just over 6 days to satisfaction, recommended.

Evermore Building

Cellar & Basement Conversion in Alton

Hi! We’re a small, family-run building company with over 50 years of combined experience between me and my father. Trusted, reliable, and reasonably priced, we handle everything from small jobs to major projects like house renovations, extensions, kitchens, bathrooms, loft conversions, loft boarding, insulation, garden rooms, decking, sheds, and standalone garages. Contact us for a free quotation! Website coming soon!

Latest homeowner review

Reviewed by Laura on 30/7/2025

Paul came quickly and carried out the job with no problem even did extra which I wasn’t expecting and still in the same price. Would def recommend and will use in future

Revived Roofing

Cellar & Basement Conversion in Alton

Revived Roofing is committed to delivering the highest quality roofing services to every customer. With over 10 years of experience in the roofing industry, we’ve built our reputation on expertise, reliability, and attention to detail. From complete roof overhauls to smaller repairs and ongoing maintenance, we handle every project with the same dedication and care. Our goal isn’t to be the biggest roofing company — it’s to be among the very best in quality and customer satisfaction. We take the time to understand your needs, offering honest advice and clear communication from start to finish. You’ll always know what’s happening at each stage of your project, so you can have complete peace of mind. We’re happy to provide free estimates, quotes, and advice, and we treat every customer with the same respect and professionalism, no matter the size of the job. Whether it’s an emergency repair in the middle of winter or a planned re-roofing project in the summer, we work hard all year round to deliver results you can rely on. At Revived Roofing, we believe quality workmanship and exceptional customer service go hand in hand. That’s why so many of our customers return to us and recommend us to others. When you choose us, you’re choosing a roofing team that truly cares about your home.

Latest homeowner review

Reviewed by Adrian on 2/12/2019

Jimmy did the job quickly and efficiently. The price was reasonable and he was good to deal with. I would recommend him.

Mr Fixer

Cellar & Basement Conversion in Alton

I'm a sole trader,with 9 years experience and orientated to a quality finish of every job.

Latest homeowner review

Reviewed by adam on 25/1/2024

Roofline Home Improvements specialise in all roofing and property maintenance, with customer satisfaction being our highest priority. check out our reviews.

Latest homeowner review

Reviewed by Ross on 22/3/2020

A great service from start to finish.

James Lepp

Cellar & Basement Conversion in Alton

J&S Developments provides all your property needs to a professional and high standard.

Latest homeowner review

Reviewed by Willis on 1/11/2017

Done the job as discussed and for the right price. Would use again

CSM Developments

Cellar & Basement Conversion in Alton

(131) Read reviews

We are a family run business that cover all aspects of building work, carpentry, landscaping, garden maintance, maintance, waste clearance. We work to ensure your projects are carried out to the highest standards. We offer a free quotation and provide x1 basic template drawings of the plans in mind. You will also benefit from our trade discount. Communication is the key and our standards are high from start to finish. As an extra initiative we take pride in providing a free safety and security home check for the vulnerable and elderly. I.e doors and window locks, spy holes, window alarms, door chains and smoke detectors.

Latest homeowner review

Reviewed by Jack on 14/3/2025

Under 1 Roof

Cellar & Basement Conversion in Alton

Here at Under 1 Roof, you can find all the trades you need! With a combined experience of over 25 years in the building trade, we offer all aspects from groundwork all the way up to roof work! Plumbing & electrical work included. We are fully qualified, accredited, & insured to complete any project you may have! Please check our reviews & pictures of previous work completed! Thank you, Chris & James, the brothers behind Under 1 Roof!

Latest homeowner review

Reviewed by Nicola on 29/6/2025

I was searching for emergency replacement of my porch after the roof failed. James provided a very reasonable quote and worked with me on requirements within my budget. I am very pleased with the results and the team’s work ethic and understanding of my situation. I hope to use them again for future works, and have recommended the company to friends and colleagues.

RA Building Services

Cellar & Basement Conversion in Alton

Hi I’m Roly from RA Building Services ,I’ve been a general builder in the trade for over 20 years ,I cover most trades including renovations ,plastering ,painting .Customer satisfaction is extremely important to us .We strive to give an excellent job for an affordable price .

Latest homeowner review

Reviewed by Yvonne on 7/7/2025

Job finished within tight timescale , good communication with them and work done very well.

Welcome to Oxfordshire Heating and Property services limited Plumbing & Heating Engineers (Gas Safe Registered & Fully Insured) We specialise in all aspects of plumbing & heating with over ten years experience. We are business dedicated to customer service & providing excellence

Latest homeowner review

Reviewed by Joe on 17/7/2025

Kyle misrepresented his credentials and failed to return to finish the job. He left me with a leaking cylinder and did not fit the compliant fire valve. This was 3 months ago and despite repeated efforts I can't get him to return and he has ghosted me. He also promised to certify the work but didnt. I believe this is because he is not a member of a CPS. He showed me a BPEC card but this is just to show he has done training , not that he is a member of a professional body. I am contacting trading standards

We are a friendly and efficient carpentry team who strive to offer customers the best service at an affordable price. Experienced in all aspects of carpentry and gardens. You will not be dissapointed with CKB

Latest homeowner review

Reviewed by Robert on 22/3/2025

No rating Did not turn up as arranged. Unreliable.

ALPHATEC LTD

Cellar & Basement Conversion in Alton

Hi, This is Alphatec ltd. We have specialised team to take all types of building jobs. We are specialised in Bathroom fitting, Plumbing , electric , new builds & renovations

Latest homeowner review

Reviewed by Katy on 10/6/2025

Inder did a very good job of upgrading our upstairs bathroom and installing a toilet downstairs. He worked tirelessly and was very punctual. Great on communication too!

London Underpinning

Cellar & Basement Conversion in Alton

We specialise in structural works, underpinning, steelwork and basements. Our experienced team are also experts in damp control, waterproofing and tanking solutions and all our work is guaranteed, offering our clients complete peace of mind.

Latest homeowner review

Reviewed by Lisa on 9/3/2023

We had a retaining wall fixed in our basement. Kevin was great at communicating and helpful with the issues we had. The team working were great, polite, and kept the place clean and tidy each day. Very reliable. Thanks!

Gareth Lewis Developments Ltd is as well established company boasting an outstanding amount of knowledge and experience in the Construction Industry. We have a highly trained dedicated team covering all aspects of domestic and commercial projects.

Latest homeowner review

Reviewed by David on 10/6/2011

Very helpful and good advice. Good quality workmanship.

D&N Flooring

Cellar & Basement Conversion in Alton

JD Construction Property provide following services: Whole House refurbishments Garage Conversions Bathroom Refurbishment Flooring &tiles installation, kitchen fitting Painting & Decoration Plastering we have 12 years of experience, 100 jobs /year! ! we have 10 crews and will provide for you quality job!!!

Latest homeowner review

Reviewed by IAN on 19/4/2021

The company were efficient and quick. The workmen were excellent and did an outstanding job. Thank you.

Daniel Holubowicz

Cellar & Basement Conversion in Alton

Latest homeowner review

Reviewed by Andre on 22/9/2015

DO NOT EMPLOY THIS BUILDER!! He has laid my wood flooring onto carpet without my knowledge and now the floor is ruined. He took on the job even though he wasn't qualified or capable of given that he told me he was,and has then stated that I told him to lay down the wood flooring onto carpet. I can CATEGORICALLY deny that. He now will not answer my calls to discuss this. UNPROFESSIONAL, RUDE AND A LIE.

A Creative Touch

Cellar & Basement Conversion in Alton

At A Creative Touch we take pride in the work we produce, we only carry out first class work and we always leave our jobs cleaner than before we started. All our work is priced at competitive rates and covered for six months.

Latest homeowner review

Reviewed by Ksenia on 9/8/2016

Gregory has fixed wall-length book shelves for us. Very happy with the end result. Thank you

Epic UK Construction

Cellar & Basement Conversion in Alton

A 5 people company based on hard work and dedication with large experience in construction

Latest homeowner review

Reviewed by Christine on 18/3/2017

Arrived approx 1 hour after phoning. Team of 3 worked hard. Work was a good quality and they stayed late to finish the job. Cleaned well after finishing.

Cooper & Sons

Cellar & Basement Conversion in Alton

(176) Read reviews

EST 1983 Family run business 4th generation https://www.cooperandsonroofing.co.uk Here at Cooper & Sons roofing we like to give our customers full confidence in are services, all of are work comes with warranty from 1year to 25years. we take pride in all of are work, each person in are team has gone through the correct training to receive the highest qualification on each task needed. Please look at some of our 5* reviews from are happy customers.

Latest homeowner review

Reviewed by Patrick on 22/7/2025

Could not have asked for more ! Great service. Fixed the issue in no time and on time ! Great family business! Will use again !

jimmy & sons carpentry

Cellar & Basement Conversion in Alton

Good experienced carpenter offering a friendly, reliable and trustworthy service. Currently working for myself and for LM Maintenance doing all aspects of carpentry. .Check portfolio of works on the LM Maintenance business page. Southampton.

Latest homeowner review

Reviewed by Ryan on 23/11/2016

Brickwork delivered to high standard. Very reliable.

Masterteck repair

Cellar & Basement Conversion in Alton

Masterteck Repair is a hard surface repair and French Polishing specialist.

Latest homeowner review

Reviewed by Paul on 9/11/2016

Job was to sand the floor of our flat and we set a price. After asking for more they guaranteed to finish for the extra price. A day later they pulled out of the job leaving it un finished. They said it was due to a black tar like substance. they said they had tried everything. My painter and decorator took a torch and scrapper and had it up in minutes. They had the wrong tools and seemed like first flooring job. After contacting asking to finish he said he would get back to me but failed to be reached.

2M Construction

Cellar & Basement Conversion in Alton

2M Construction is a London based family business and we pride ourselves on our diverse portfolio, including different kind of projects in the residential sector. 2mconstruction co uk

Latest homeowner review

Reviewed by Nina on 23/11/2022

Did a great job, very efficient and completed installing a shower unit, light and door in one day. Highly recommend.

EasternEuropeanWorkforce

Cellar & Basement Conversion in Alton

Hello! We are a team of tradesmen who work hard to make building ideas a reality. With all our commitment and skills, our work is up to a high standard. Full refurbishment, extensions, lofts. Feel free to ask for a quote. Anytime you are welcome.

Latest homeowner review

Reviewed by Yinka on 14/2/2025

Very conscientious, I’m Well impressed with how Professional and reliable Oleg was and this is 6 months after he finished the job.

Mckenna Bell Group

Cellar & Basement Conversion in Alton

Latest homeowner review

Reviewed by bianca on 19/7/2013

George Bell came to work on some damp related issues in my flat in feb. since having completed the works the problems which first occurred have turned worse and George has been unwilling to get back in contact with me, despite chasing him for 5 months which only reaffirms that the job was poorly undertaken. The company main reception also seems to be a virtual reception so you can never speak with anyone helpful

ConstructFM LTD

Cellar & Basement Conversion in Alton

We are a Portsmouth based construction and facilities management company with over 25 years of building experience and knowledge. Covering every aspect of the building industry , from bricklaying to electrical, our team have all the relevant certificates and we are fully insured to carry out any work required. From small maintenance works to large projects. We offer free no obligation quotations. Please feel free to get in touch.

Latest homeowner review

Reviewed by Kevin on 24/10/2023

Latest homeowner review

Reviewed by Martin on 26/4/2019

Very hardworking and friendly people! Pleased with the outcome!

Building Refurb Ltd

Cellar & Basement Conversion in Alton

Latest homeowner review

Reviewed by Jocelyn on 12/7/2013

Came back with an accurate quick quote.

Latest homeowner review

Reviewed by Christopher on 5/8/2012

Generally good

TTF CONTRACTORS

Cellar & Basement Conversion in Alton

TTF contractors is a family-owned and operated business. Built on a foundation of honesty, quality craftsmanship and a sincere effort to achieve 100% customer satisfaction.TTF contractors works all over the Haslemere and surry area

Latest homeowner review

Reviewed by Celia on 1/7/2017

The decking is sagging and moves every time you walk on it which we have to do to get out of the garden. The step also rocks when walked upon. The wood was left cracked in areas and there are some miss cuts. The concrete was undertaken during torrential rain and has resulted in constant dusting being trailed onto the decking and subsequently into the house. The concrete ran down the length of the driveway and cannot be removed. Phoned to complain 3 weeks ago and heard nothing further.

ABS Home Improvements

Cellar & Basement Conversion in Alton

Hi there , ABS Home Improvements here . I have a background in electrical and plumbing . I have undertaken a wide range of work from decorating , bathroom & kitchen refurbs, house re-wires to gardening and odd jobs around the home. I take pride in my work no matter how big or small the job is at the best rate I can , no job is too small so please get in touch for a free quotation

Latest homeowner review

Reviewed by Colin on 4/11/2022

On time each day attended. Excellent work, price as quoted and very reasonable.

J&H Plastering

Cellar & Basement Conversion in Alton

J Hill Plastering drylining rendering All aspects of plastering interior and exterior

Latest homeowner review

Reviewed by Shelagh on 2/12/2024

Friendly informative quick to respond and quote received following day.

RA Building Services

Cellar & Basement Conversion in Alton

Friendly and reliable service fully insured

Latest homeowner review

Reviewed by Kate on 28/2/2023

Did a poor job. Begged to be paid and promised to return to fix issues. He never did and ignores messages. Felt not sealed properly, bubbled out and on the front where visible. Knocked 2 bricks completely loose and just left them like that. Didn't mention them. Regret taking a punt on him. Silly of me to pay the full amount. You live and learn.

D & K PROPERTY MAINTENANCE We’re a family run business est in 2012. We specialise in roofing, guttering and property maintenance. All work is guaranteed. Services. * Roofing *Guttering *Chimney repairs *Dry ridge *Dry verge *Flat roofs *Lead work *Pointing *Moss removal *Painting internal / external *Asbestos *Jet washing *Rubbish removal

Latest homeowner review

Reviewed by Anne on 1/8/2025

Very reasonable rates and clean and tidy working and a nice chap. Very pleased with the painting of the outside of our house in Rickmansworth.

L N BUILDING

Cellar & Basement Conversion in Alton

Latest homeowner review

Reviewed by Nick on 8/7/2011

Lee made contact within 2 hours of posting the job, came out and quoted that afternoon and started only a week later. After explaining the quality of the job I wanted he and Sam got stuck in and made quick work of it. They were very careful about covering everything up and cleaning up afterwards. I was left with some lovely flat ceilings and wouldn't hesitate to recommend him. His quote was good value and resulted in me getting the whole property done. Well done!

majestic dream

Cellar & Basement Conversion in Alton

Majestic dream maintenance is based in Stockport. We are a engineering company specialist in all maintenance and installation building work working closely with property management companies, Landlords and households.

Latest homeowner review

Reviewed by Shahd on 9/12/2019

Excellent service and courteous throughout job. Left house clean.

Burgess Improvements

Cellar & Basement Conversion in Alton

Latest homeowner review

Reviewed by Suzanne on 4/7/2011

Dave did a teriffic job clearing up my very overgrown garden and accomplished in just a few hours a job I had been ignoring for months. He was very prompt to reply to my posting and appeared in the garden just a couple of days later. He did such a good job he's coming back to build us a bike shed and sort out the flowerbeds. Great job, thank you Dave!

Avbase Building Services is an award-winning family business with over 20 years' experience in the building trade. We operate in and around Surrey, Sussex, London, and areas within the M25 circular. We cover all aspects of building to include complete house renovations, kitchen and bathroom fitting, open-plan living areas, garage conversions and extensions from start to finish, including wall knock-through, steel work, brick work, electrical work, tiling, plumbing, plastering, carpentry, and decorating. With a team of highly skilled builders and building trade specialists, our expert knowledge and project management skills, we ensure that all our clients receive an excellent level of service during their journey to the perfect home of their dreams.

Latest homeowner review

Reviewed by Debbie on 10/7/2015

Great finish and meticulous attention to detail. Very happy with Nick and the overall job.

MG dynamic solution LTD

Cellar & Basement Conversion in Alton

We are a company which provides a full range of quality building services including planning and designing. Home improvement and constuction projects. we do variety of home improvement and construction projects.

Latest homeowner review

Reviewed by Barbara on 2/5/2018

Girts and his work mate did an excellent job enlarging my small patio. They were both very professional cleaned up after themselves left my garden neat and tidy. I would use them again

mwallbuilders

Cellar & Basement Conversion in Alton

You'll benefit from a locally run business with years of experience in the trade. All work is undertaken with appropriate insurance and complies with current building regulations. feel free to call me for a quote on any work you may need doing

Latest homeowner review

Reviewed by Steven on 11/7/2014

Martin replaced & re-tiled my conservatory floor following water damage.He was friendly efficient and gave valuable advice whilst working to our agreed budget.I would have no hesitation in recommending him for other household handyman jobs

Hi we r family run business with over 20 years experience in the building game we carry out all types of building work from new builds to extensions two full ? refurbishment all types of groundwork ?drives ways patios jet washing painting all types of of construction fully in insured highly experienced company look forward to hearing from you

Latest homeowner review

Reviewed by Lynn on 23/4/2018

Honest reliable and hard working man. Very pleased with the results. Price quoted for unseen work involved was fantastic. Would recommend and definately hire again. One very happy customer

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Recently completed jobs

Here's what's been happening in and around your area

Foundations work

We have a problem with the foundations of the patios adjacent to the house and need someone to repair them.

Reconfiguration / Renovation...

Reconfiguration / Renovation Services required: demolition and/or wall removal Work relates to the following room(s): dining room Non load-bearing...

Reconfiguration / Renovation...

Reconfiguration / Renovation Services required: demolition and/or wall removal, plastering / plasterboarding 2 part job: 1 - construct 3x3m office...

create simple doorway in...

create a simple arch or doorway between 2 bedrooms through non structural partition wall. (no bricks etc)

Size of extension: 1 room...

Size of extension: 1 room Height of extension: 1 floor Room(s) to be in the extension: bedroom(s) Build a single 8 foot wall to enclose a 8 x 8...

Size of extension: 4 rooms...

Size of extension: 4 rooms Height of extension: 2 floors Room(s) to be in the extension: bedroom(s), lounge/living room, utility room 2 storey...

Reconfiguration / Renovation...

Reconfiguration / Renovation Services required: demolition and/or wall removal Work relates to the following room(s): dining room Non load-bearing...

Size of extension: 1 room...

Size of extension: 1 room Height of extension: 1 floor Room(s) to be in the extension: kitchen looking for advice and a quote on an extension and...

To lay a new patio on a grass...

To lay a new patio on a grass area in our back garden. It will need to be cleared of grass and soil so that foundations can be laid and then the patio...

Reconfiguration / Renovation...

Reconfiguration / Renovation Services required: bathroom installation, electrical, kitchen installation, plumbing, tiling - walls, Removal of...

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  4. Pick a tradesperson

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  5. Job done

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