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Basement renovation

Basement renovation

At a time when moving home ends up costing thousands of pounds in fees, staying put and improving has become popular amongst thousands of UK homeowners.

By improving your home with a basement conversion, not only will you add value to your property, but you’ll have extra space that can be used all year round.

Why should I convert my basement?

In most instances, the basement is usually a dark and dingy area housing a few boxes or cases of wine. Basements are normally large areas and utilising this space can increase your home’s value by thousands of pounds and give you extra room throughout the year.

Benefits of basement conversions include:

  • Added value

By converting your basement you’ll be able to add value to your property. By moving home you’ll end up wasting thousands of pounds in fees, so stay put and improve.

  • Extra space

With a basement renovation you’ll make the most of extra space and as the infrastructure is already in place you won’t have to pay out for construction. You can turn this wasted area into anything you want, from a bedroom or lounge to a study or games room.

  • Cheap conversion

As the basement is already in place the room will only need to be secured and made safe, rather than having to pay out for an extension to be built on the back of your property. This means you’ll save money and be able to start using the new space quickly.

Basement conversion quotes

With a basement conversion you can start using wasted space more effectively, adding value to your home and saving on moving expenses.

For up to four FREE quotes from local, vetted and reputable professionals simply complete our quick form and find out how much you could save with a basement renovation.

Average Basement renovation cost

Basement conversions fluctuate in cost depending on project scale, professionals hired and location. If your basement conversion doesn’t 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.

Average price per Basement renovation job in 2022

Avg. price low

Avg. price low
£45,000

Avg. price

Avg. price
£146,667

Avg. price high

Avg. price high
£247,000

£247500

£185625

£123750

£61875

£0

Prices based on actual Basement renovation costs for your area, as reported by local Quotatis members.

Basement renovation installation cost in your area 2022

Labour cost £28,000
Material cost £10,000
Waste removal £2,000
Time frame: 1-6 months

Advantages for Basement renovation

  • Adds an additional space your home
  • Preserve Your Garden
  • Boosts Your Home's Value
  • Can add real interest to your home and a wow factor

Disadvantages for Basement renovation

  • Basement conversions are a serious type of extension, they can take up to nine months for bigger excavation projects. That’s a lot of noise and mess.
  • Unless you can get natural light into the basement they can look dark and gloomy
  • Consideration needs to be made to ensure that the room doesn't become damp

Basement renovation Manufacturers

Basement renovation FAQs

Does a converted basement need windows?

Windows or lightwells can be a great way to introduce natural light into your basement, making it a more valuable, enjoyable space. However, they’re not always an essential requirement.

It’s important for your basement conversion to meet ventilation and fire safety building regulations. Windows can be a good way to do this, but they’re not the only option. Stack or mechanical ventilation, or ensuring that stairs up from your basement connect to an exit can be a good alternative.

So, while windows can be a great asset to your basement conversion, if you can’t afford them or they’re not structurally feasible, you can still create a basement conversion without them.

How to convert a basement into living space?

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.

Are pumps used for basement conversions noisy?

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.

Is a basement conversion worth it?

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.

How to convert a basement into an apartment?

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.

Basement Renovation | Before, During & After

Nicholas James Construction

Based: in Bromley, BR1

From past fifteen years we have been established as the finest building and construction service pro...

Latest review

Cosima R., SE13
29th January 2016

Conversion | Basement in London

Very friendly and helpful.

Rated Local builders

Nicholas James Construction

7 review(s)
Based: in Bromley, BR1 3AX

From past fifteen years we have been established as the finest building and construction service provider to clients in Bromley and its surrounding areas.

Similar Customer Enquiries for Basement renovation

11 Jun

Conversion | Basement

London - SE10

Enquiry from: Tony H

Start Date: Immediate

waterproof basement and treat walls in basement for rising damp. basement dimensions are 3mx4mx1m (height) are you the property owner: owner of the property property type: terrace how many rooms are ...

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your website is using material taken directly from our website, you our using words associated with our registered trademarks. we ask you remove these as a matter of urgency or legal action will be ta...

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07 Jun

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03 Jun

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Gainsborough - DN21

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i just need a quote for making the cellar waterproof are you the property owner: owner of the property how many rooms are currently within the basement: 1 room how many rooms do you want to have in to...

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30 May

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Basement renovation Lead Basement renovation Lead Basement renovation Lead Basement renovation Lead Basement renovation Lead Basement renovation Lead

hello, my wife and i are in the process of buying a house in the windmill hill area of bristol and one of the main areas of concern that has come up on our survey is that the basement area has had a ...

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26 May

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looking for a full basement conversion in sneinton. can i please book a visit for consultation? cheers nick are you the property owner: owner of the property property type: semi detached how many roo...

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25 May

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Brighton - BN2

Enquiry from: George B

Start Date: Less than one month

hello, i'm looking at converting a half basement 2.7 x 3.5m in a semi (not the party wall) into a standard utility room, requiring 0.9m depth removing to be level with the kitchen floor. are you the ...

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21 May

Conversion | Basement

Doncaster - DN1

Enquiry from: Margaret H

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tanking full cellar (semi-detached victorian property) are you the property owner: owner of the property property type: semi detached how many rooms are currently within the basement: 2 rooms how man...

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19 May

Conversion | Basement

Bicester - OX25

Enquiry from: Peter W

Start Date: Immediate

we need external tanking to our extension foundations. are you the property owner: owner of the property property type: semi detached how many rooms are currently within the basement: 1 room how many ...

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19 May

Conversion | Basement

Nottingham - NG5

Enquiry from: Zainab F

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Hi I'd like a quote for a cellar conversion. Many thanks Zainab

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18 May

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Stockport - SK6

Enquiry from: Julie B

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we require a full basement refurbishment are you the property owner: owner of the property property type: terrace how many rooms are currently within the basement: 1 room how many rooms do you want t...

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15 May

Conversion | Basement

Doncaster - DN4

Enquiry from: Chris C

Start Date: Less than one month

full cellar conversion into and office space are you the property owner: owner of the property property type: semi detached how many rooms are currently within the basement: 2 rooms how many rooms do ...

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12 May

Conversion | Basement

Loughborough - LE11

Enquiry from: Nise B

Start Date: 1 to 3 months

the existing cellar is not in use and is damp at the moment. would like to convert into either a bedroom and ensuite or extra living space with cloak room. please email or if phoning leave a voicemail...

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06 May

Conversion | Basement

Northampton - NN1

Enquiry from: Craig L

Start Date: Immediate

i’d like a quote to get the cellar damp proofed and a window installed to comply with building regulations and also a price for an entire refurbishment are you the property owner: owner of the prope...

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04 May

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Nottingham - NG3

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hi, i am in the process of buying a house in alexandra park with a clean, dry basement (approx 45 square metres over two rooms). i'm wondering if you'd be able to provide a rough quote for flooring a...

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03 May

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Shrewsbury - SY3

Enquiry from: Eleanor O

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tank a small cellar and make it water tight are you the property owner: owner of the property property type: detached how many rooms are currently within the basement: 1 room how many rooms do you wan...

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03 May

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Bristol - BS3

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01 May

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Darwen - BB3

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tank small basement and make it into a liveable room. would prefer contact via email at first. are you the property owner: owner of the property property type: terrace how many rooms are currently wi...

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28 Apr

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Watford - WD17

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currently working out what the indicative cost would be to dig down in the basement which is currently 6 foot, to enable it to meet building regs and be counted as a second bedroom. so looking to get...

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25 Apr

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conversion of a 3.5m x7m cellar with 2.05 head space into very basic dry space for a dining table. are you the property owner: owner of the property property type: terrace how many rooms are currently...

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