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

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Phoenix Construction continues to provide quality and efficiency on all manner of projects.

Latest homeowner review

Reviewed by shaun on 3/2/2021

Neville was contracted to build our garage in October last year which took longer than expected with many extra costs to us .We are Now left with so many snag jobs to complete which Neville agreed to do but never turned up to complete these jobs

Small family run building company with over 40 years experience over 2 generations as a premium general building company. All types of building work carried out to the highest standard. A one stop shop for all your building needs right from the design and planning stage to completion. Joinery, roofing specialising in flat roofs Building and Plastering A wealth of experience in remodelling and renovations, extensions and sunrooms. Landscaping and paving. All areas covered. Fully insured, trained and certified tradesmen

Latest homeowner review

Reviewed by Fred on 24/3/2021

Fantastic job by Paul and his team, removed old fallen down retaining wall and hedge and built new wall with a fence on top. Good communication from Paul from start to finish and everywhere left clean and tidy at the end. Will definitely use Paul again for any further work.

We are Two Brothers Refurbishment, if you are thinking in starting your own domestic or commercial project improvement,then please do not hesitate to contact us, we will be only to happy to help. Extension&Loft Conversion Internal Renovation&Reconfig.

Latest homeowner review

Reviewed by Chandrakala on 17/2/2021

Sabi and his team are very professional and finish the job as promised. Extremely happy with finished result. Very much satisfied and would definitely recommend.

We are locally based construction company in Weston-super-Mare. We aim to deliver a quality finish to every job. Also take on any job weather it’s small or large.

Latest homeowner review

Reviewed by John on 19/12/2019

Nothing is too much trouble. Cain and his staff worked hard to do a professional job.

Bespoke Construction & Consultancy Solutions is a company formed with a passion for doing things the right way. We have expert knowledge within many aspects of construction including traditional construction, sustainable construction and eco friendly construction. So from Barn Conversions and Cottage Renovations to Bespoke Extensions and New Build Houses we have the solution and team to carry out any project from concept to delivery.

Latest homeowner review

Reviewed by Jamil on 13/3/2021

Rhys visited my property to look at an extensive renovation and said he would follow up. Chased up for a quote 2 weeks later and was told he would send something over. It has been almost 3 months since, not a word! Waste of time.

FlorinS Construction is a maintenance/handyman business operatingin and around Greater London and we are able to undertake a large range of services including but not limited at general buiding,carpentry,plumbing , painting, furniture fitting and anything else you need in your home or bussines.

Latest homeowner review

Reviewed by Robert on 18/3/2021

Quick to quote, very good and quickly updated specification. Scheduled job early and completed early. Sent plenty of photos of work in progress and completed job as I was unable to visit site due to lockdown. Very careful and considerate to residents in the building.

Quality & Pride Professional Building Services

Latest homeowner review

Reviewed by richard on 14/8/2015

Steve and his team did a thoroughly professional job. He arrived everyday on time or early and did not miss a single day. He advised us on various aspects of the work. We were very comfortable to have Steve in the house and we liked his work so much that we asked him to replace our windows too. You can only speak as you find and therefore I can only agree with the positive reviews on this site..

The Manufacturer and Installer of Garden Sheds.Garden office buildings are growing in popularity with more and more people making the modern switch to work from home. Garden offices provide the perfect work-life balance solution whilst creating extra space at home. Our premium quality garden rooms are fully-insulated meaning you will have a warm, dry and comfortable space to work all-year-round. Not at all like a ‘shed office’ or ‘shoffice’, our buildings are built to the same quality, safety and insulation standards as a room in your house. This means you can create a professional and comfortable workspace in the practicality of your home garden.

Latest homeowner review

Reviewed by shaikhali on 17/12/2020

very good , All points clear before we have to start work

Covering all aspects of construction, refurbishment and maintenance we draw on a wealth of knowledge gained over 15 years in the building trade. Quality craftsmanship by qualified trades people with customer service as priority :) ... Team Safeguard.

Latest homeowner review

Reviewed by James on 21/2/2021

After quoting for the job, COVID came, however Safeguard kept me informed at all stages, when it was safe for them to start and complete the job. The team arrived on time, made sure everything was as protected as possible, and just kept working. Taking only short lunch breaks. Made sure that all waste was taken out as tidily, and quickly as possible. When job done again the team cleaned up and only left when we were happy with everything. We would give 10 stars if they were available. Highly recommended

WK CONTRACTING LTD undertake all aspects of building work from plastering a single ceiling or wall to a full house renovation. We also offer home refurbishment, rendering, new build, renovation and home extension work which can include joinery, plumbing and electrics alongside our high quality plastering and finishing service. 

Latest homeowner review

Reviewed by Sarah on 12/4/2021

Not only did Krystian call back quickly in response to my advert, he also send out a guy to quote for the job when he said he would. Communication was great. The work was done within budget and on time and he even did extra work as well. The work was excellent, both Krystian and his mate turned up on time every day and worked hard to get the external wall removed. The site was cleaned up at the end of the day. I now have a wonderful open plan kitchen/conservatory and won't hesitate to recommend these guys:)

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Cellar & Basement Conversion specialists - what you need to know

Basements and cellars are all too often missed opportunities, with the potential to add real value to your home. Conversions can unlock this potential, transforming underground spaces into useable rooms to suit your needs. Whether you’re looking for a guest room or granny flat, a larger kitchen or somewhere to let that gym equipment gather dust… a conversion may be the answer.

The precise nature of the conversion will depend on your plans for the space but regardless of its intended use, your new basement will need damp-proofing. Heating and ventilation systems must also be installed, to ensure the space is safe and comfortable.

Though many period properties will have basements, they are mostly cramped spaces intended purely for storage. Your builder may therefore need to dig down substantially to increase the head height. You will want to be sure your new basement isn’t claustrophobic and that any new rooms adhere to building regulations regarding minimum head height.

You may choose to extend your current basement beyond the original footprint of the house or building. With the right guidance, extending out beneath a garden can be a great way of maximising space. This may also allow your builder to incorporate light-wells into the design, which is an excellent way of introducing natural light into your basement. 

If there is no existing basement or cellar in your property, major excavation work will be necessary to create one from scratch. Along with any excavation, a new staircase will be added and your builder may also need to underpin any party walls.

Cost of cellar and basement conversion work

There are significant variables when it comes to costing – namely the extent of structural work required, access and ground conditions. The cost of damp-proofing, for example, will be dictated by the condition of your basement to begin with. If you’re looking at additional features, such as light-wells or bathrooms the extra work entailed will increase costs significantly.

For the most basic basement conversion, where no digging down or underpinning is required, it is advisable to budget £600-£1200 per square meter. If your basement floor needs lowering, costs will rise to between £1650 and £2200 per square meter. For basements created from scratch, quotes will be in the region of £2500 - £4000 per square meter.

The qualifications your tradesperson needs

Basement and cellar conversions can be carried out by reputable builders, often working in tandem with structural engineers.

Some builders will carry a card from the Construction Skills Certification Scheme. If your builder lists any specific qualifications it’s always a good idea to ask for proof of these before work begins.

There are various official trade bodies in the UK and it‘s advisable to check that your builder is registered with one of them – it’s not a necessity but is usually a good indication of how reputable they are. Each body has its own set of criteria, which must be met to qualify for membership.

You can find more detailed information about the different qualifications an experienced builder might have here

Planning permission for cellar and basement conversion jobs

Unless there is significant change to the external appearance of the building, planning permission is not usually required for basement or cellar conversions. This will obviously differ for listed buildings, or those in conservation areas.

You are likely to need planning permission where major excavation work is required to create a new basement, or where your basement is to serve as living accommodation. Further information can be found here

Insurance for cellar and basement conversion work

Public liability insurance is a requirement of any reputable tradesperson. This protects against any accidental damage to your home.

Questions you should ask your tradesperson

  • Do they have public liability insurance?
  • Do any of the planned adjustments require planning permission?
  • Does the basement design adhere to building regulations (namely ventilation / fire escape routes / ceiling height)?

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Require a quote for lowering the ground floor level of a period property by 2 feet, reinstating / relaying concrete floor. Ground floor is 41.6 m2....

How our service works

  1. Create a job - it's free

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

  2. Get quotes

    Up to 3 tradesmen 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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