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The quick way to find a local Cellar & Basement Conversion specialist in Portsmouth, Hampshire

There are 86 Cellar & Basement Conversion specialists in Portsmouth, and last month we helped homeowners get quotes for their home improvement jobs.

Browse Cellar & Basement Conversion specialists in Portsmouth, Hampshire

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

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ConstructFM LTD

Cellar & Basement Conversion in Portsmouth

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

James & Sons

Cellar & Basement Conversion in Portsmouth

We are a family owned Father and Sons team. We install conservatories, doors and windows. We also build extensions and garage conversions. Our Solar Panel side of the business are able to supply and install solar panels to your roof. We project manage your job from start to finish. We have many satisfied customers. Please contact for a free quote.

Latest homeowner review

Reviewed by Mrs C on 10/5/2024

This family have been marvelous, getting a very urgent collection sorted out for me mega quickly, so that l would not lose my property permanently (which was likely to happen imminently), and which would have caused me great distress. Now l can relax and sort things out with them once the worst of the pressure is off. Many thanks, boys, for being so kind. You will be first in consideration when l need someone with any of the large range of abilities that are on your list. Many thanks.

The Boar Projects

Cellar & Basement Conversion in Portsmouth

Welcome to our Rated People site. We are qualified team of specialists and general building contractors with over 15 years of experience in all aspects of renovation including extensions, conversions, roofs, bathrooms & kitchens makeovers,

Latest homeowner review

Reviewed by Tim on 25/1/2018

MBC have been unprofessional due to their unreliability, failing to complete the work and taking 4 months to do a job which was estimated to take 10 days. Whilst removing a bathroom the ceiling collapsed, they ruptured a water pipe damaging new kitchen although it was repaired.They have failed to replace the new sink which they cracked, left spotlights unfinished in bedroom, loft access and fireplace hearth unfinished. Martin has apparently been a project manager but his time management is appalling.

BA Projects

Cellar & Basement Conversion in Portsmouth

Hi, I've been in the trade of building for 20 years with a keen eye to detail. I'm reliable and honest. I'll will always keep you updated on the progress of any project and always make time to ensure that my customers are happy during and after the projects are completed. Assuring you of my best intentions Darren

Latest homeowner review

Reviewed by Sue on 4/7/2025

I found Darren to be friendly and professional. His quotes were reasonable. The jobs changed slightly once the work started and Darren took the time to explain the options. Some changes required additional money from me but I was happy to pay as the end result was worth it. I would definitely ask Darren for quotes in the future.

ASW BUILDER

Cellar & Basement Conversion in Portsmouth

I have been doing building work now for the last 15 years I cover all types of building work to extensions, alterations conservatories, Landscapeing renovation, Plastering I enjoy doing different types of projects including the awkward stuff if your interested in any work being done please let me know I am happy to take a look and talk you through the jobs and different ideas Many thanks Andrew wall Asw Builder

Latest homeowner review

Reviewed by Alex on 1/1/2026

Excellent build quality, transparency and communication.

Plasterwise

Cellar & Basement Conversion in Portsmouth

Hi my name iOS Ian peters proprietor of plasterwise Dampproofing we offer great prices on job good clean work service and respect for your home call time

Latest homeowner review

Reviewed by michele on 28/11/2021

Hired Ian to Build a single story extension and install new kitchen and downstairs shower room . Crew were very pleasant and very helpful in planning the the job ahead of them. Very pleased with the work carried out looks amazing Having to put up with an awkward neighbor didn't deter them from doing and completing the job. The price put in was very reasonable. When the work was ongoing the area was always left clean and as tidy as possible . I would recommend Ian 100% , and would use him again.

Home Renovations Ltd

Cellar & Basement Conversion in Portsmouth

House Extensions, Loft Conversions and Renovations Specialists

Latest homeowner review

Reviewed by Umeet on 9/1/2021

We have found drainage problems which the insurance company will not honour due to incorrect installation during this project. This has cost us dearly.

Premier Heat

Cellar & Basement Conversion in Portsmouth

Godwins is a reading based company of 10 years specialising in all aspect of Plumbing & Heating Air conditioning Oil boilers And renewable energy

Latest homeowner review

Reviewed by Rachel on 25/10/2025

I was happy and paid as this plumber said he was coming back to fit some caps later in the week. Since, I have noticed the tap has been plumbed incorrectly hot to cold and vice versa, he did not return with the caps. I think he was just lying that what he wanted to fit was better because he forgot to put them on when fitting the shower and my sink isn’t attached to the wall securely. I have given him a couple of months now to put it right but he ignores my calls and texts.

Rated People

Cellar & Basement Conversion in Portsmouth

Loft conversion specialist, with 25 years worth of experience.

PG Build

Cellar & Basement Conversion in Portsmouth

PG Build offers a diverse array of specialist building services designed to enhance your educational, commercial, or residential projects. Our offerings range from bespoke Playground Specialist Services and comprehensive Renovations & Remodelling to cutting-edge CCTV & Networking solutions, ensuring exceptional quality in every facet. Our expertise also includes Resin Bound Paving, Play Equipment Installation, and innovative Custom Projects. Additionally, we are proficient in Wet Pour Safety Surfacing, Landscaping, Automated Access Solutions, and reliable Maintenance Services. For those seeking distinctive solutions, explore our Custom Container Buildings. Choose PG Build for a partnership dedicated to realising your vision with unmatched precision and excellence.

Sheridan Roofing Home Services LTD

Cellar & Basement Conversion in Portsmouth

Sheridan Roofing & Home Services Ltd is a family-run home development specialist with over 50 years’ experience in transforming and maintaining residential and commercial properties. We cover all aspects of home improvement — from roofing, tiling and slating to full building works, landscaping, paving, and internal finishes — offering a complete service under one roof.

GLS Carpentry

Cellar & Basement Conversion in Portsmouth

GLS Carpentry is a professional and efficient Carpentry and construction company based in Portsmouth, Hamspshire. Director George Simmonds is a hands on owner striving to lead his team to produce high quality craftsmanship on all project he oversees. With over 10 years experience in the building trade, George prides himself and his company on a strong work ethic and care about every quality and detail of his work which resinates to each member of the team

GLADIATOR PROPERTY SERVICES

Cellar & Basement Conversion in Portsmouth

Although new to rated people, we are a fully insured, reliable company based in West Sussex with over 20 years of experience. We provide a wide range of services within domestic, commercial and industrial premises.

Gheorghe Tudor

Cellar & Basement Conversion in Portsmouth

I got 20 years of experience in construction industry. Im skilled handyman and very friendly.

Rosewood Building Contractors

Cellar & Basement Conversion in Portsmouth

We are new to rated people but we have been established 32 Years, we are a small company specialising in extensions and kitchen and bathroom refurbishments. We cover all types of work from brick work repairs to painting and decorating. We fit plastic windows and doors and are Fensa registered We give free prompt estimates with no hidden extras.

PPS

Cellar & Basement Conversion in Portsmouth

Steven Rose, the founder and owner of PPS, brings a wealth of expertise to the construction industry with a background as a qualified Electrician and Plumbing and Heating Engineer. Holding a Master's degree in construction project management, a Level 6 diploma in applied health and safety, and a Level 5 in Leadership and Management, Steven is committed to delivering comprehensive turnkey design and build construction solutions. PPS specialise in New buildings, Extensions, Loft Conversions, Renovations, Bathrooms, Kitchens, Landscaping, Electrical, Plumbing and Heating. Steven is a distinguished member of industry-related affiliations, including MAPM (Member of the Association for Project Management), CertIOSH (Certified Member of the Institution of Occupational Safety and Health), and FCIOB (Fellow of the Chartered Institute of Building). At PPS, our core values, are encapsulated by the acronym SERVE (Service, Excellence, Relationships, Value, and Expertise), which underlines our commitment to providing quality building services. We specialise in various aspects of the construction process, offering services such as Architectural Design, Planning Applications, Building Control, Project Delivery, and Handover and sign-off Documentation. Our approach is designed to alleviate the burden on our clients by seamlessly managing the entire project lifecycle. PPS engages vetted construction professionals to deliver quality design solutions aligned with client requirements. From securing planning permissions to adhering to CDM regulations, completing F10 notifications, and conducting safety audits, we ensure that health and safety standards are met throughout the project. We streamline the process by obtaining costs from our trusted supply partners, organising and managing the program of works, and ensuring the timely ordering of long lead material items to minimise delays. Our commitment to transparency includes producing written progress reports, keeping clients informed about project advancements, and promptly addressing any identified issues to ensure project targets are achieved. Additionally, PPS facilitates visits from Building Control Officers, oversees the issuance and registration of electrical and gas certifications, and manages resource allocation. With a customer-centric focus, we aim to create a stress-free experience for our clients, ensuring that every project is executed with precision and meets the highest standards of quality and compliance.

Everlast Roofing & Driveways

Cellar & Basement Conversion in Portsmouth

We are a family run business with over 30 years in the trade we take pride in our work

Task Property Solutions

Cellar & Basement Conversion in Portsmouth

K&H CONSTRUCTION SERVICES

Cellar & Basement Conversion in Portsmouth

K&H Construction Services is a professional building company based in Guildford Surrey and the surrounding areas. From installing a new driveway to building your dream home, we can provide you with the help and advice you will need on helping you meet your expectations. We have an excellent reputation for our quality of work, which can be seen right here on our online home. K&H Construction Services can undertake a wide array of projects, no matter how big or small they may be. K&H Construction Services ensure that every project is finished to the highest of standards and more importantly - on time. We respect your property and and will ensure cleanliness at all times - we treat your home as we would our own. So whether you are looking for a small repair to your roof or you need to turn that wasted space into something habitable, look no further - contact K&H Construction Services today.

Roberts Plastering & Rendering

Cellar & Basement Conversion in Portsmouth

Small family plastering company with over 20 years experience. We pride ourselves on providing honest and reliable workmanship and excellent standards of finish on every job we do.

M I Bone Builders

Cellar & Basement Conversion in Portsmouth

Family business with over 35 years experience. We are a multi trade business and can undertake everything from drawing up plans to laying carpet. We are also contractors for a number of local authorities.

Sabre Assessing LTD

Cellar & Basement Conversion in Portsmouth

Curve Management Services Ltd offers a service designed specifically to its customers requirements. Our services include leak detection, leak repairs, damp investigations, building envelope surveys and property drying. Our experienced technicians undertake all work. Our comprehensive building knowledge and unmatched experience in our field of expertise allows us to complete any job from start to finish. Our team of skilled technicians undertake work under the guidance of our experienced project managers. We can undertake private and insurance work via our in-house insurance claim specialist.

OPENMIND BUILDERS LTD

Cellar & Basement Conversion in Portsmouth

Open Mind Construction has been established with the aim of offering affordability, reliability and quick action to fulfil customers expectations on every occasion. Our qualified and experienced team will do it's best to complete the task and satisfy the client. We are able to cope with every task whether you need full property refurbishment or just a small maintenance. We are covered by public liability insurance. We give free quotes with no obligations so please feel free to give us a call!

Rated People Test

Cellar & Basement Conversion in Portsmouth

Bogue Construction

Cellar & Basement Conversion in Portsmouth

Bogue construction have almost 30yrs experience in the industry We aim to make your project to run as smooth as possible with as little disruption to the customers as possible, we are confident that you will be very happy you chose us for your project

Toth Builder

Cellar & Basement Conversion in Portsmouth

J S MULTIWORK LIMITED

Cellar & Basement Conversion in Portsmouth

F B S

Cellar & Basement Conversion in Portsmouth

SUSSEX CARPENTRY & CONSTRUCTION LTD

Cellar & Basement Conversion in Portsmouth

At Sussex Carpentry & Construction, we pride ourselves on our excellent customer care and outstanding results. This is all thanks to our professional and dedicated team who have both knowledge and experience. Our team are friendly, reliable and most of all work to the highest levels of customer satisfaction. We are a local, affordable and recommended company who would be happy to provide a quote.

SGH Construction & Groundwork

Cellar & Basement Conversion in Portsmouth

SGH Construction & Groundwork have been established since 2016 we are a family run business that has been operating via customer recommendations. We pride ourselves on safely delivering the highest quality work for our clients. All of our staff are fully qualified for the job in hand. Please feel free to give us a try.

Craig Harries Solutions

Cellar & Basement Conversion in Portsmouth

MC Home Improvements

Cellar & Basement Conversion in Portsmouth

We are a family run business that has been running for the last 25 years we specialise in new roof UPVC flat roofs, roof repair repairs, cladding, repointing painting roof cleaning driveway cleaning resin driveways and all other driveways

RATED PEOPLE LIMITED

Cellar & Basement Conversion in Portsmouth

KM RENOVATIONS LTD

Cellar & Basement Conversion in Portsmouth

CALTOM CONSTRUCTION LTD

Cellar & Basement Conversion in Portsmouth

Caltom Construction has 40 years experience in the construction industry.We specialise in reinforced concrete construction.Nationwide but usually in and around London. Thanks Colin Lavelle Caltom Construction limited

Cole Thomas Building & Development

Cellar & Basement Conversion in Portsmouth

Cole Thomas is a company that prides itself on delivering a friendly, honest and passionate building service, from start to finish we understand that no detail is too small, and we aim to ensure all client requirements are met in full. As a company that strives for perfection, our 10 years of building experience ensures that no matter the size of job that we undertake you are sure to be delighted with the results. Our team of craftsmen are carefully chosen to ensure that nothing is overlooked, from planning stages, to design and completion. A conscientious and diligent approach means that whilst we never cut corners, we will always meet deadlines on time and on budget, we guarantee a premium, professional service from our workmanship right down to our time keeping and cleanliness. Our clients can always expect technical expertise, timely responses and to be kept updated throughout the works process. Services we provide: • Brickwork • Hard Landscaping • Plastering • Extensions • Conversions • Alterations • Refurbishments • Property development Our work covers a vast range of domestic extensions, conversions, alterations and improvements. Contact us, we would love to hear from you!

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  • Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  • Check ratings

    Look at each tradesperson's profile page to see their ratings and reviews.

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    Use our homeowner checklist for extra tips on choosing a tradesperson.

  • Job done

    Leave a rating for your tradesperson based on quality, reliability and value.


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Size of extension: 2 rooms Height of extension: 1 floor Room(s) to be in the extension: bathroom, bedroom(s) I need to accommodate a relative with...

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redesign kitchen/summer room

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putting in steel

I have a steel to be put in, calcs done, we will provide the steel etc, we will remove brickwork and clear away. CASH

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Coving work in 2 rooms , have the coving only no other materials I have some fittings/materials and would like the tradesman to supply others...

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How our service works

  1. Create a job - it's free

    We'll connect you with the right tradespeople, from over 30 different trades.

  2. Get quotes

    Up to 3 tradespeople can provide a quote, but on average you'll get 1-2.

  3. Check ratings

    Look at each tradesperson's profile to see their ratings and reviews.

  4. Pick a tradesperson

    Use our homeowner checklist for extra tips on choosing a tradesperson.

  5. Job done

    Leave a rating for your tradesperson based on quality, reliablity and value.

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