Loft Conversion in London

Get Loft Conversion Prices in London

Home > Loft Conversions Projects > Loft conversion > London

Loft conversion companies in London

Are you thinking about a loft conversion in order to open space in your house and avoid the necessity to move? Then use our no cost and easy service to compare quotations and get the top price for the work you wish carried out.

Loft conversions are proving to become more popular then ever in the UK. In most properties the loft makes up unused space which could go to better use. Converting can change the area into a bedroom, bathroom, playroom or perhaps ensuite bedroom.

In actual fact there's plenty of potential to transforming your attic, such as extra value for your home which may be up to 20%. Loft conversions are also suggested over a home extension since the infrastructure has already been in place. Plus, you won't be removing any garden space.

If the attic conversion would benefit your home and you're interested in extra space, contrast prices from reliable companies in London and get the best offer for the work you wish completed.

Average Loft conversion cost in London

The regular cost of a Loft conversion is £25000. Costs differ based upon the materials and the firm selected. The upper price range can be as high as £28750. The material costs are mainly approximately £6250

Average price per Loft conversion job in 2025

Avg. price low

Avg. price low
£32,188

Avg. price

Avg. price
£51,875

Avg. price high

Avg. price high
£70,938

£71500

£53625

£35750

£17875

£0

Prices based on actual Loft conversion costs for London, as reported by local LeadsDoWork members.

Loft conversion installation cost in London 2025

Labour cost £17,500
Material cost £6,250
Waste removal £1,250
Time frame: 6-12 weeks

Loft conversion searches in May 2025

Loft conversion Projects in London in April 2025

262,017

Requests for quotations in London in April 2025

5,400

Requests for Loft conversion quotations in London in April 2025. -18% change from March 2025.

5,400

Requests for Loft conversion quotations in London County in April 2025. 0% change from March 2025.

We noted 262,017 requests for property quotes within London. Of these quotation requests the amount of loft conversion quotations within London was 5,400. Quotatis would have been able to match these consumers with as many as 4 suitable fitters who were available for work within London at that time. Request a free house survey from reputable companies within London.

Source: Numbers calculated based on the search volumes in major search engines

Loft conversion searches in cities and towns near London April 2025

5,400

Requests for quotations in London in April 2025

London

England's capital city is now recuperating from a successful Olympic Games and this giant multi-million pounds task, along with quite a few property schemes, has modernised the city post-war. Despite this, there are still loads of homes providing an insight into the past and Tudor, Georgian and Victorian properties line the streets. With a contrast of the aged and the brand new, there are several projects householders tackle, from energy efficiency upgrades to property extensions.

Looking for Loft conversion in London?

Get free quotes from local builders

Get free quotes

Loft conversion pros in London

Dream the Build

19 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...

Latest review

A., NW7
4

Conversion | Loft in London

Good quote

Unique Lofts LTD

2 review(s)
Based: in South mimms, EN6 3NX

Professional loft conversions at Unique Lofts, we are a specialist loft company with over 15 years of experience in construction. Call us today.

Latest review

Alan P., EN11
5

Conversion | Loft in Hoddesdon

only company that quoted

London Project Management Ltd Ta Modern Attics

1 review(s)
Based: in London, N3 2DN

Modern ATTICS specialise in loft conversions and House Extensions. We cover all areas of London - North, East, West, Central and South London.

Latest review

Helen W., NW4
4

Conversion | Loft in London

Nice guy

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.

Latest review

Jagdish K., HA3
5

Conversion | Loft in Harrow

A extremely thorough unhurried meeting carried out. Honest opinions and views provided. Carefully going through plans to...

Kullar Builders LTD

1 review(s)
Based: in Barking, IG11 9TP

Latest review

Benedict B., RM7
5

Conversion | Loft in Romford

CALLED IN AND ADVICED WITH ALL STYEP BY STEP BEFORE CALLING THE BIULDER.

Doma Build

1 review(s)
Based: in London, ha28fd

Latest review

JAMES C., HA1
5

Conversion | Loft in Harrow

positive advive

A1 Forever Solutions LTD

1 review(s)
Based: in London, SE25 6EP

Latest review

Peter M., TW7
4

Conversion | Loft in Isleworth

Waiting for the appointment

Similar Customer Enquiries for Loft conversion in London

20 Mar

Conversion | Loft

London - N16

Enquiry from: Mo J

Start Date: Immediate

What type of property is this for? House What type of extension do you need? Loft Conversion When was the property built? Pre 1920 How many stories is the current building? 2 Storeys Do you have p...

Post a similar request >

19 Mar

Conversion | Loft

London - N19

Enquiry from: Jacqui W

Start Date: Immediate

Loft conversion Lead

adding dormer to velux loft are you the property owner: owner of the property property type: terrace what are you looking to convert the space into: bedroom/s are you looking to have stairs: no do you...

Post a similar request >

16 Mar

Conversion | Loft

London - SE2

Enquiry from: Iyore U

Start Date: Immediate

Customer is looking for Loft Conversion quotes. They are unsure of options so would like to discuss. Confirmed interest via Customer lives in London area Please call to arrange an appointment

Post a similar request >

13 Mar

Conversion | Loft

London - SE12

Enquiry from: Jessica K

Start Date: Immediate

What type of loft conversion do you need? Dormer style loft conversion When was the property built? 1921 to 1979 How many stories is the current building? 3 Storeys Do you have plans drawn up? No -...

Post a similar request >

04 Nov

Conversion | Loft

London - SE9

Enquiry from: William D

Start Date: Immediate

Customer made enquiry for Loft Conversion quotes online. Confirmed interest via phone at 17:44 Homeowner lives in London area. Please call to arrange appointment

Post a similar request >

07 Oct

Conversion | Loft

London - NW4

Enquiry from: Alireza A

Start Date: Immediate

I have a 30-square-meter loft with decent ceiling height that I want to convert into a one-bedroom, one-bathroom layout. I'd like to know the estimated cost, the materials required, and the expected t...

Post a similar request >

14 Sep

Conversion | Loft

London - N16

Enquiry from: Barbara C

Start Date: Immediate

Convert loft to bedroom and bathroom. Add stairs.

Post a similar request >

08 Sep

Conversion | Loft

London - SE9

Enquiry from: Rob B

Start Date: Immediate

we have an existing simple velux conversion and are looking to add a dormer and bathroom. are you the property owner: owner of the property property type: terrace what are you looking to convert the s...

Post a similar request >

06 Sep

Conversion | Loft

London - N13

Enquiry from: Tom M

Start Date: Immediate

loft converted many years ago with velux windows wondering what the cost might be to add a full dormer to maximise space. are you the property owner: owner of the property property type: semi detached...

Post a similar request >

02 Jul

Conversion | Loft

London - SW4

Enquiry from: James C

Start Date: Immediate

converting an existing atic extension into a dormer extension with a terrace

Post a similar request >

09 Jun

Conversion | Loft

London - E4

Enquiry from: Asad I

Start Date: Immediate

hi there, it is a semi-detached bungalow of 9.5m x 8m (approx) ground floor with a quite enough loft height. i want to have maximum inhabitable/living space probably 2 or 3 bed rooms(as possible and ...

Post a similar request >

18 Jan

Conversion | Loft

London - W1H

Enquiry from: Naufil S

Start Date: Immediate

Loft Conversion Rear Dormer Cost Plan

Post a similar request >

09 Jan

Conversion | Loft

London - SW18

Enquiry from: Andrew M

Start Date: Immediate

have an existing loft conversation with dormer roof facing the back of the house, would like to extend the existing dormer out 1.5m full width to new permitted development hip to gable are you the pro...

Post a similar request >

05 Jan

Conversion | Loft

London - W7

Enquiry from: David C

Start Date: Immediate

new permanent staircase to loft area to replace a very steep ladder style staircase that is already installed. will need to cut through cupboards and potentially floor boards in loft? are you the prop...

Post a similar request >

08 Dec

Conversion | Loft

London - SE27

Enquiry from: Katrina P

Start Date: Immediate

hello, i am purchasing a property and would like to convert the loft into a home office / bedroom. i would like to receive a quote for how much this would cost and the estimated time to complete the ...

Post a similar request >

16 Nov

Conversion | Loft

London - SW14

Enquiry from: Justin W

Start Date: Immediate

we have an ageing rear dorma on a loft conversion with plumbed bathroom. we are currently having a new roof fitted front. and new gutters etc. i would like to get an idea to upgrade our current dorma ...

Post a similar request >

13 Nov

Conversion | Loft

London - E17

Enquiry from: Bashir C

Start Date: Immediate

homeowner loft conversion please contact to appoint

Post a similar request >

08 Nov

Conversion | Loft

London - E16

Enquiry from: Cos S

Start Date: Immediate

Need a Roof lift and conversion in Beckton, Newham, London! Im abroad and Im reachable on the number I shared via whatsapp or via email

Post a similar request >

06 Nov

Conversion | Loft

London - SE27

Enquiry from: Michael C

Start Date: Immediate

We want to convert the loft in our 1920s semi-detached house into two additional bedrooms and a small bathroom. This would be through the addition of a full-width rear dormer. We need a survey, and th...

Post a similar request >

03 Nov

Conversion | Loft

London - E17

Enquiry from: Ivelina M

Start Date: Immediate

i need a loft staircase installed are you the property owner: tenant (with permission) property type: terrace what are you looking to convert the space into: living space are you looking to have stair...

Post a similar request >

Local & reliable builders near me

Tell us about your loft conversion project

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

Find up to 4 builders in London

Get free, no-obligation local loft conversion quotes from 4 verified builders working in London.

Hire with confidence

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

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love LeadsDoWork it's a big part of my …

Love LeadsDoWork it's a big part of my Business I would recommend to anyone

FAQs

How long will a loft conversion take?

It depends on the style and size of the conversion, but in general, a loft conversion will take between 1-2 months. A loft conversion is a substantial building project, and plans will need to be drawn up. This may add to the time it takes to complete your loft conversion.

how long does a loft conversion take?

If you’re about to carry out a loft conversion project, you’d probably be wondering how long it’ll take to complete the task. Well, you’re not alone! This is one of the most common questions when it comes to loft conversion projects, however, providing a set timeframe for completion of such projects is impossible as all loft conversions vary. There are different factors that can determine the duration of your project. These factors include, the materials to be used, the type of the proposed loft conversion, the kind of staircase you’ll like to have installed, the number of windows included, the number of rooms to be added as well as a number of other influencing factors. As a result of these variables, the milestones and timings provided are only to be taken as guidelines. If you’d really like to have a set date, you can get in touch with a professional for help.

Generally, it’ll take up to 8 weeks to complete a loft conversion project.

✓ The first week activities will include putting up scaffolding, receiving the first materials for the build and creating an opening in the roof to gain access to the loft space.

✓ In the second week, the structure of the roof will be ammended and more support added.

✓ Third week, the floor joists will be fitted, building of the loft conversion will start, completion of the external roof works and commencement of plumbing and electric works.

✓ Fourth week, complete the building, construct the loft floor, fit the roof windows, insulation, ventilation and internal stud walls.

✓ Fifth week, apply plaster and plasterboard to the room walls, create a staircase opening and fit the new staircase.

✓ Sixth week, plaster the staircase area, complete plumbing and electrical works, hang the doors, fit skirting, handrails and bannisters and start decoration.

✓ Seventh week, complete the decoration and clean and wipe out all wastes.

✓ Eight week, complete all the remaining tasks.

an every house have a loft conversion?

If you’re having issues with the amount of space in your home and need an extra space without affecting your garden, loft conversion comes to mind. Not only is it a great solution to creating more living space within a home, but it’s also one of the most budget-friendly solutions you can count on to expand your space by thinking upwards rather than sideways. So if you’re thinking about converting your loft, one thing that almost immediately comes to mind is whether or not your house is suitable for loft conversion.

To answer the question of whether every house can have a loft conversion is a very simple one. Generally, not every house is suitable for loft conversion. This is due to the fact that each and every loft space - from the stairways below and floors to the rafters and the roof up above, is unique. Therefore, the best way to really figure out whether or not a house’s loft offers the potential for conversion is to get in touch with a loft specialist.

So what can make a house not suitable for a loft conversion? Let’s take a closer look!

✓ A house will not be suitable for a loft conversion if the height of the ceiling happens to be too low and it’ll not be possible to have it raised.

✓ If you do not own own the freehold to the loft space, you won’t be able to convert the loft. Surprisingly, this happens to be a common issue in London.

✓ You will not be able to convert your loft if you reside in a conservation area or in a listed building. But you can identify a design solution that’ll still comply with the conservation rules and keep planners happy.

how much is a loft conversion?

With the ability to add approximately one third of your existing living space ( by converting your old, unused attic) to your home or property without having to let go of your garden, it’s quite easy to see the reason why loft conversion has rapidly grown to become one of the most popular home improvements in the UK. However some homeowners usually shy away from the idea simply by looking at the perceived high cost of carrying out such a project, despite several researches showing that loft conversions offers the best rate of return on initial investment when compared to the other home improvement projects. So exactly how much would it cost to carry out this project?

Just like several other home improvement projects, the cost of a loft conversion varies greatly depending on a wide range of influencing factors. These factors include the size of your home, how old your home is as well as the quality of the fixtures and fittings you want to install. For instance, a high end bathtub alone can cost you thousands of pounds, meanwhile you can also construct a full bathroom suite on just a couple of hundred pounds. However, to give you an idea of the minimum cost of a loft project we’ll look at the most popular types and the minimum cost of each.

✓ Internal Loft Conversion - The most affordable type of loft conversion tends to start from £25,000 and above.

✓ Dormer or L-Shaped Dormer Loft Conversion. These are the most popular types of loft conversion. Dormer price tends to start from £35,000, while the L-shaped dormer starts from £45,000.

✓ Mansard Loft Conversion - This involves replacing the entire side of a sloping roof with a vertical wall and flat roof. It requires a planning permission. The type of loft conversion usually starts from £45,000.

✓ Hip To Gable Loft Conversion - This usually starts from £50,000.

Placholder Image

Other Top Projects in London

Customer Reviews

Overall rating:


London Loft conversion installers are rated 4.4 out of 5 based on 19 reviews of 222 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with Loft conversion projects that have been connected with Loft conversion pros to help them. All Loft conversion contractors All London Loft conversion contractors

Are you a builder in London?

We can help you get more loft conversion work with our qualified job leads and boost your business.

Join today