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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 2021

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

your area Basement renovation installation cost in 2021

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

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.

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.

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.

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.

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

ALPHA drives and patios

1 review(s)
Based: in Bristol, BS7 9XE

Welcome to Alpha Drives & Patios. We are your local home improvements company, providing our services across the surrounding area. Whether it's just a few repairs, or a complete new drive or patio, you can trust us to make your house a home. Our aim ...

London Renovations Ltd

1 review(s)
Based: in London, E3 2JQ

We are a London based building company and our team has over 25 years of experience in the trade. WE RENOVATE HOMES, BUILD EXTENSIONS CONVERT LOFTS AND VOIDS. If you are looking for the most complete list of home refurbishment services, you will cert...


12 review(s)
Based: in Dumfries, DG2 0RY

Architecture and Design firm with client service our number one priority. GLASGOW - EDINBURGH - DUMFRIES - NW ENGLAND

A1 Property Maintenance

2 review(s)
Based: in Newton abbot, TQ12 1GE

Small family business. Giving you the personal touch. Keeping the customer informed all the way. Friendly and reliable.

Dream the Build

18 review(s)
Based: in London, EC1V 2NX

DREAM the Build. Ltd ' Constructing your Vision Making home development exciting, fun and asset building experience , future proofing household & investors Who we are ? Starting fresh in a new country is never easy, but what we did Catal...


2 review(s)
Based: in Twickenham, TW14 0PT

ZNS Construction is a family owned honest, reliable, reputable building and construction company. We take pride in our work and believe the best form of advertising is through client satisfaction


1 review(s)
Based: in Hayes, UB4 9YD

JASSI BUILDERS LTD based in Hayes, offer services in Extensions & Conversions. They have an average rating of 3 from 1 review(s). See their latest 3 star review below

David Burns Contracts

4 review(s)
Based: in Co armagh, BT62 2HZ

All types of roofing work under taken from start to finish timber slating tiling flat roofs buytle rubber coverings


3 review(s)
Based: in Stockport, SK5 7DL

BRICKS AND PIECES LTD based in Stockport, offer services in Extensions & Conversions. They have an average rating of 4.6666666666667 from 3 review(s). See their latest 5 star review below

Peace of Mind Property Service

4 review(s)
Based: in Pensilva, PL14 5QR

Competent and trustworthy roofing and general building company, all roof type repairs and renewals covered flat or pitched. All areas of building work covered from extensions/new work to alterations like partitioning, loft hatches, doorways, stonew...

Similar Customer Enquiries for Basement renovation

31 Jul

Conversion | Basement

Bradford - BD2

Enquiry from: Sarah B

Start Date: Immediate

tanking a small basement, currently as two rooms 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 rooms ...

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25 Jul

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London - SE3

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

We are looking to install a new light well in our converted basement room. It's currently made of old 'swimming pool glass blocks' with a wooden frame, but it has started to leak (wooden frame has rot...

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18 Jul

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Leyland - PR25

Enquiry from: Nicole S

Start Date: Immediate

tanking, plastering, lighting and electrics, skirting boards, flooring. are you the property owner: owner of the property property type: semi detached how many rooms are currently within the basement:...

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18 Jul

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Leek - ST13

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beams and ceiling in cellar to be removed, replaced, new floorboards to be put down in the living room above, walls to be made good, new ventilation to be put in. are you the property owner: owner of...

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13 Jul

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Bromyard - HR7

Enquiry from: Matthew F

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relay floor, damp proof. potentially dig down to give more height. hoping to talk through options for some guidance are you the property owner: owner of the property property type: semi detached how m...

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13 Jul

Conversion | Basement

Aberdeen - AB15

Enquiry from: Mark R

Start Date: 1 to 3 months

we are looking to make our basement liveable space. the plan is currently to convert into a gym/cinema room/spare room. currently there is not enough headroom so would need dug-out to an appropriate d...

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09 Jul

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Halstead - CO9

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full cellar conversion no digging out required, very high ceiling! no plumbing but electrics required are you the property owner: owner of the property property type: terrace how many rooms are curren...

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Hereford - HR4

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looking for an quote, to convert a cellar - thing that the floor would need to be dropped a bit? basically there is a old cellar in the house, which is victorian, would like to look in to making it a...

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28 Jun

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Northampton - NN1

Enquiry from: Dolli R

Start Date: Less than one month

i'd like my cellar tanked out to be able to use it as a craft room. are you the property owner: owner of the property property type: terrace how many rooms are currently within the basement: 1 room h...

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28 Jun

Conversion | Basement

Hinckley - LE10

Enquiry from: Tracy M

Start Date: Immediate

cellar walls currently tanked but water still coming up from under the wall, i’m looking to get the problem permanently resolved. are you the property owner: owner of the property property type: ter...

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21 Jun

Conversion | Basement

Macclesfield - SK10

Enquiry from: Ross G

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cellar conversion to habitable space inc separate toilet and utility room - property is a listed townhouse in a conservation area are you the property owner: owner of the property property type: terr...

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19 Jun

Conversion | Basement

Cannock - WS12

Enquiry from: Lisa G

Start Date: Immediate

we have a bathroom in the cellar however it needs renovating. it gets really damp so walls/floors need treating and we want a new bathroom putting in are you the property owner: owner of the property...

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15 Jun

Conversion | Basement

Bradford - BD6

Enquiry from: Brian H

Start Date: Less than one month

kitchen in cellar needs a window fitting for means of an escape in the event of a fire , and must comfort to building regs are you the property owner: owner of the property property type: terrace how...

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15 Jun

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Leicester - LE3

Enquiry from: Charlotte S

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hi there, i am looking to have a free quote on tanking our cellar in our grade two listed building in glenfield, leicester - please could someone give me a call to arrange, are you the property owner...

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06 Jun

Conversion | Basement

Worcester - WR2

Enquiry from: John S

Start Date: Less than one month

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the aim is to refurb rather than waterproof or tank the cellar replace thermalite blockwork with brick in blocked-up doorway take up brick floor paving, istall membrane and pour 4 ins. concrete, smoo...

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05 Jun

Conversion | Basement

Cambridge - CB22

Enquiry from: Hywel D

Start Date: 1 to 3 months

cellar to be lowered by about a foot and tanked and lined to turn into a usable room - cinema room. are you the property owner: owner of the property property type: detached how many rooms are current...

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03 Jun

Conversion | Basement

Watford - WD18

Enquiry from: Pretti P

Start Date: Immediate

we have a basement that we do not use. not sure exactly what is needed so an onsite visit would be appreciated are you the property owner: owner of the property property type: semi detached how many r...

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01 Jun

Conversion | Basement

Bath - BA1

Enquiry from: Maria J

Start Date: Immediate

hi, we are considering lowering the basement and to add a 2m external extension to the house in bath, somerset. i am including the current floor plan (model 1) and how we wish the floorplan (model 2)...

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28 May

Conversion | Basement

Hessle - HU13

Enquiry from: Tim D

Start Date: Immediate

we require an exterior cellar well being fitted with a rain cover which can open and strong enough for use in case of anyone falling onto it. currently we have an iron grid mesh which can be opened as...

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27 May

Conversion | Basement

Tring - HP23

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i am looking to rent a commercial property that has a basement which is large enough to convert into a room that can be used at full height. i am interested in ventilation for this. this might be a li...

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