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 Lewisham in December 2024
Requests for Basement renovation quotations in Lewisham in December 2024. 0% change from November 2024.
Requests for Basement renovation quotations in London County in December 2024. 0% change from November 2024.
The London Borough of Lewisham is a London borough in south-east London, England and forms a part of Inner London. The borough wasformed in 1965, by the London Government Act 1963, as an amalgamation of the former area of the Metropolitan Borough of Lewisham and also the Metropolitan Borough of Deptford, which had been created in 1900 as divisions of the County of London. However, minor boundary changes have occurred since its creation. The most considerable amendments were made in 1996, when the former part of the Royal Docks in Deptford was transferred from the London Borough of Greenwich.
The local authority is Lewisham London Borough Council and it is based in Catford. The borough covers an overall area of around 13.57 square miles. It's enclosed by the Royal Borough of Greenwich towards the east, the London Borough of Bromley towards the south plus the London Borough of Southwark to the west. The River Thames forms a short section of northern boundary together with the Isle of Dogs in the London Borough of Tower Hamlets. Deptford Creek, Pool River, River Quaggy and River Ravensbourne pass by means of the borough.
Based on population estimates produced in the middle of 2014, Lewisham is a borough with approximately 291933 permanent residents. Around 43 per cent of homes are owner-occupiers. The Prime Meridian passes through Lewisham. Blackheath, Goldsmiths, University of London and Millwall F.C. are located inside the borough.
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London - SE14
Enquiry from: Douglas H
Start Date: Immediate
basement tanking/waterproofing and maybe additional works as required are you the property owner: owner of the property property type: terrace how many rooms are currently within the basement: 1 room ...
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 ...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
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...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
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...
London - SE3
Enquiry from: Nathanael G
Start Date: Immediate
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...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
Bromley - BR1
Enquiry from: Rob T
Start Date: Less than one month
basement conversion, i have a basement under my house, total area 75 sq meters, you can stand in 2 thirds 4 ft in the rest, rear door entrance, door at front for conveyor belt, i have planning but no...
London - SE13
Enquiry from: Giuseppe L
Start Date: Less than one month
Hello there i have just acquired a shop but is quite small and because it has got a cellar downstairs i was looking for quote to make it usable. I would appreciate if I can get a quote or any feedback...
London - SE14
Enquiry from: Naomi R
Start Date: Immediate
Hi - we are looking to get our basement converted and wanted to get a quotation please. It is to convert an existing basement into a proper room, would involve digging out part of the basement which ...
London - SE23
Enquiry from: Aktarun K
Start Date: Immediate
I live in a house conversation, ground floor and have an existing basement. I would like to dig 0.5- 1 meter down to meet legal height requirement and put 2 bedrooms and 1 shower/toilet in the basemen...
London - SE26
Enquiry from: Ruth P
Start Date: Immediate
Would like to put in a basement and build small extension
London - SE14
Enquiry from: Hussnain S
Start Date: Immediate
I want to extend the basement of my property also want to separate the entry and exit of the basement
London - SE9
Enquiry from: B
Start Date: Immediate
Quote needed for a basement dig and convention into living space approx 35 feet long.
London - SE10
Enquiry from: Hamish H
Start Date: Immediate
50 SQM basement to be dug out, underpinning, waterproofing, relocation of plumbing, completed to watertight shell. Property is a victorian terraced house in a conservation area. Property fronts direct...
London - SE10
Enquiry from: L
Start Date: Immediate
basement conversion
London - SE4
Enquiry from: Mal S
Start Date: Immediate
Creating a basement including all drawing and waterproof and make 2-3 bedroom flat.Need to have access from outside and make stairs to ground floor from basement.
London - SE13
Enquiry from: Cosima R
Start Date: Immediate
We occupy the ground floor flat in a Victorian house. There is already an extension to the rear and a ca 1.60m deep underfloor space. We are looking to extend the basement and further extend the exist...
London - SE13
Enquiry from: Cosima R
Start Date: Immediate
We occupy the ground floor flat in a Victorian house. There is already an extension to the rear and a ca 1.60m deep underfloor space. We are looking to extend the basement and further extend the exist...
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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.
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.
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.
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.
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