Basement Renovation Quotes

Compare Basement Conversion Prices Near You

Home > Extensions & Conversions Projects > 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 2026

Avg. price low

Avg. price low
£19,000

Avg. price

Avg. price
£22,001

Avg. price high

Avg. price high
£23,001

£23600

£17700

£11800

£5900

£0

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

Basement renovation installation cost in your area 2026

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

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

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.

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.

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 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.

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.

Complete Basement Remodel Timelapse

Our reviews

Average

Its nice that the information neede ...

Its nice that the information needed is all in one place.

it was easier to put in a request t ...

it was easier to put in a request then companies can conatct direct.. only one company came forward but it saved me trawling the net for hours ..

Great service job completed by cont ...

Great service job completed by contracted party

Rated Local builders

Similar Customer Enquiries for Basement renovation

18 Oct

Loft & Roof Insulation

Larne - BT40

Enquiry from: Dianne C

Start Date: Immediate

Quote to top up roof insulation and fit

Post a similar request >

25 Jul

Septic Tank

Larne - BT40

Enquiry from: Gary K

Start Date: Immediate

New septic tank and insulation

Post a similar request >

11 Jun

Gutter Replacement

Larne - BT40

Enquiry from: Jean M

Start Date: Immediate

(address removed) gutter repairs

Post a similar request >

11 Apr

Skip Hire

Larne - BT40

Enquiry from: Zoe H

Start Date: Immediate

Skip for garden and 2 room clearance (washing machines/fridge old garden furniture)

Post a similar request >

09 Apr

Pitched Roof Repair

Larne - BT40

Enquiry from: Harris june M

Start Date: Immediate

Need change crowl and cement the top

Post a similar request >

11 Feb

Pitched Roof Repair

Larne - BT40

Enquiry from: Samuel John B

Start Date: Immediate

1 ridge tile to be set back in to correct position

Post a similar request >

24 Jan

Solar Electricity

Larne - BT40

Enquiry from: Thomas J

Start Date: Immediate

Not in a Conservation Area

Post a similar request >

24 Jan

Air Source Heat Pumps

Larne - BT40

Enquiry from: Thomas J

Start Date: Immediate

Air Source Heat Pumps enquiry

Post a similar request >

24 Dec

Roof cleaning

Larne - BT40

Enquiry from: Norman V

Start Date: 1 to 3 months

Mossy roof needs cleaning

Post a similar request >

07 Oct

Flat Roof Replacement

Larne - BT40

Enquiry from: Robin T

Start Date: Less than one month

Flat roof approx 3.3m square needs butyl membrane replaced. aluminium trims and small pebbles look fine. access when installed was by ladder and via window openings. see roof on google maps. phone me

Property: detached · Built: 1930-70 · Height: 2nd floor

Post a similar request >

04 Oct

Basin, Shower, Bath, or Toilet Fitting

Larne - BT40

Enquiry from: Iris H

Start Date: Immediate

I need a new raised toilet fitted and the old one removed please

Post a similar request >

15 Aug

Skip Hire

Larne - BT40

Enquiry from: Noel W

Start Date: Immediate

Skip H*** for mixed use, needed for at least 5 days in private carpark

Post a similar request >

12 Aug

Skip Hire

Larne - BT40

Enquiry from: MARTA S

Start Date: Immediate

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

I have taken down shelving unit and a bar - need to get rid of wooden parts

Post a similar request >

16 Jul

Air Source Heat Pumps

Larne - BT40

Enquiry from: John T

Start Date: Immediate

Current heating is Oil. Call back anytime

Post a similar request >

15 Jul

Skip Hire

Larne - BT40

Enquiry from: Beatrice C

Start Date: Immediate

Wooden floors black bags amd carpet

Post a similar request >

02 Jul

Skip Hire

Larne - BT40

Enquiry from: Joanne A

Start Date: Immediate

2 yard skip for clearing out a garage

Post a similar request >

02 Jul

Garden Maintenance

Larne - BT40

Enquiry from: Nigel C

Start Date: Immediate

Just front of house brances etc cut down and clear up job aswell back yard has just moved into new house

Post a similar request >

22 Jun

Skip Hire

Larne - BT40

Enquiry from: Joanne A

Start Date: Immediate

Mini skip for garage clear out

Post a similar request >

22 Jun

Skip Hire

Larne - BT40

Enquiry from: Joanne A

Start Date: Immediate

Small Skip required for Garage clean up

Post a similar request >

Advertisement

Local & reliable builders near me

Tell us about your basement renovation project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in your area

Get free, no-obligation local basement renovation quotes from 4 verified builders working in your area.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.