Basement conversions fluctuate in cost depending on project scale, professionals hired and location. If your basement conversion doesnât need any construction work, then it should cost relatively little. However, the majority of projects at least need damp proofing and water proofing work, if not insulation, heating, electrical work and more. This means that even smaller basement conversion projects are still relatively expensive. The average UK cost ranges from £30,000 - £50,000.
| Avg. price low | Avg. price low |
|---|---|
| Avg. price | Avg. price |
| Avg. price high | Avg. price high |
£46500
£34875
£23250
£11625
£0
| Labour cost | £28,000 | |
| Material cost | £10,000 | |
| Waste removal | £2,000 |
Requests for quotations in Bexleyheath in January 2025
Requests for Basement renovation quotations in Bexleyheath in January 2025. 0% change from December 2024.
Requests for Basement renovation quotations in Kent in January 2025. 0% change from December 2024.
From past fifteen years we have been established as the finest building and construction service provider to clients in Bromley and its surrounding areas.
Very friendly and helpful.
Bexleyheath - DA7
Enquiry from: Caren N
Start Date: 1 to 3 months
We wish to convert our cellar into a room that is part office/part storage and part chillout room for teenagers. It will need completely tanking out and new stairs with a kick round to lessen the ste...
Bexleyheath - DA7
Enquiry from: Caren N
Start Date: Immediate
Digging out floor of existing cellar around one foot to increase height, tanking floor, ceiling and walls and replacing staircase in cellar. Time scale: 3-6 months Call To Appoint
London - SW17
Enquiry from: Ben M
Start Date: Immediate
Basement window installation.
London - SW6
Enquiry from: Lucia L
Start Date: Immediate
I would like a price quote for doing basement extension
London - NW3
Enquiry from: Gordon T
Start Date: Less than one month
damp patches in corridor and in living room( garden level at south end) front bedroom, bathroom , conservatory and kitchen clear. are you the property owner: owner of the property property type: terra...
London - SW11
Enquiry from: Alice T
Start Date: 1 to 3 months
Basement conversion quotations Time scale: 1-3 months Please call to appoint Time scale: 1-3 months Please call to appoint
London - NW8
Enquiry from: Annabel K
Start Date: Immediate
Basement under a Mews House in Maida Vale approx 900 sq ft floor space for the basement area and there is an atrium at the back so light wont be a problem
London - SW18
Enquiry from: Leila M
Start Date: Less than one month
To remove and replace flooring in cellar. To remove skirting boards and replace with new. Paint and decorate walls. Time scale: Less than one month Please call to appoint
London - SW6
Enquiry from: Surinder K
Start Date: 1 to 3 months
basement conversion. Almost the same as a neighboring property.
London - SW6
Enquiry from: Anne H
Start Date: 1 to 3 months
conversion of basement from coal shoot (currently housing washing machine, dryer and freezer) into 1 bed, ensuite bathroom, utility room and open space for kids room Homeowner Please contact to ap...
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If your basement has a cavity drain membrane, it’ll need a pump to move water away from the exterior of your basement and prevent flooding.
Sump pumps can be noisy, but they don’t have to be. Generally, if you have a well-designed pump that’s installed correctly, you shouldn’t find it a problem. For best results, hire a skilled, experienced professional to supply and install your drainage system.
Whether a basement is worth converting depends on your location and how much work it requires.
A basement conversion can be a great way to add space to your home, and can raise your property value. However, it can also be one of the most expensive ways to do this, so if there’s a possibility to extend your property, or convert a loft or garage, it’s worth considering this first.
You should also compare how much your basement conversion will cost with the amount it could raise your property value by. In some areas, a quality basement conversion could earn you money in the long run, but in others it’ll only cost you. If you’re planning on staying in your property for a long time this might not matter to you, but if it’s not your forever home then it’s an important thing to think about.
The best way to go about converting a basement depends on its current condition and what you’d like to use it for.
If you’re happy with its size and structure, and just want to turn it into useful storage space, then your project shouldn’t be too complicated. You’ll simply need to make sure it’s damp proof and waterproof – either by fitting tanking or a cavity drain membrane with a sump and pump. You may also need to invest in new flooring, fit basic lighting, and plaster and paint the walls and ceiling.
If you’d like to turn your basement into living space, then you’ll need to think about ventilation, insulation and heating. If this involves creating a kitchen or bathroom, you’ll also need to incorporate plumbing.
If you want to extend your basement, add lightwells, or fit windows and a sunken garden, this makes things much more complicated. You’ll probably want to hire an architect or basement conversion building specialist to help you with the design and planning, and you’ll need a structural engineer to help you ensure your property is sufficiently supported.
In some cases, it’s possible to convert a basement into an apartment. This can be a great way to incorporate an additional dwelling into your property and increase its value. However, converting a basement into an apartment can be quite expensive and time-consuming.
As with any type of dwelling, you’ll need to think about basic things like access, damp proofing, ventilation, insulation, heating, electrics, plumbing, lighting and décor. If you’re planning on extending your basement, then you’ll also need to ensure that your property is sufficiently supported.
It’s a good idea to consult a professional, like a basement conversion building specialist, to find out how feasible your project is before you go ahead with it.
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