Loft Conversion in Kensington and Chelsea

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Average Loft conversion cost in Kensington and Chelsea

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
£31,250

Avg. price

Avg. price
£50,000

Avg. price high

Avg. price high
£67,917

£68500

£51375

£34250

£17125

£0

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

Loft conversion installation cost in Kensington and Chelsea 2025

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

Loft conversion searches in February 2025

Loft conversion Projects in Kensington and Chelsea in January 2025

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Requests for quotations in Kensington and Chelsea in January 2025

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Requests for Loft conversion quotations in Kensington and Chelsea in January 2025. 0% change from December 2024.

5,400

Requests for Loft conversion quotations in London County in January 2025. 0% change from December 2024.

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

Loft conversion searches in cities and towns near Kensington and Chelsea January 2025

145

Requests for quotations in Westminster in January 2025

Kensington and Chelsea

The Royal Borough of Kensington and Chelsea is an inner London borough of Royal borough status, towards the west of the centre. The borough was created in 1965 from the former boroughs of Kensington and Chelsea. Kensington's Royal Borough status was inherited by the new borough. It covers an area of 4.68 square miles. As the smallest borough in London and the second smallest district in England, this urban area is one of the most densely populated within the UK.

In 2005, the borough had more of its land covered by domestic buildings than anywhere else in England at 19 per cent, which is more than half of the national average. Additionally, it had the fifth highest proportion of land covered by non-domestic buildings at 12 per cent.

The borough is immediately towards the west of the City of Westminster and to the east of the London Borough of Hammersmith and Fulham. It consists of important museums and universities in Albertopolis, department stores including Harrods, Peter Jones and Harvey Nichols, and embassies in Belgravia, Knightsbridge and Kensington Gardens. It's home to the Notting Hill Carnival, Europe's biggest. It includes lots of the most costly residential districts in London and even in the world, and also districts with higher levels of social housing and poverty. The local authority is Kensington and Chelsea London Borough Council. The borough's motto is Quam Bonum in Unum Habitare, which may be roughly translated as 'How good to dwell in unity'.

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Loft conversion pros in Kensington and Chelsea

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...

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 Kensington and Chelsea

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...

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24 Oct

Conversion | Loft

London - W10

Enquiry from: Alex M

Start Date: Immediate

*homeowner loft conversion please call to appoint

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16 Mar

Conversion | Loft

London - W12

Enquiry from: Jeremie S

Start Date: Immediate

hello, i acquired a newly built house in 2013 within a gated development. the property is subject to restrictive covenants. in light of the above, i would be interested to assee the possibility (or n...

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14 Oct

Conversion | Loft

London - SW18

Enquiry from: Camilla H

Start Date: Immediate

stairway to third floor, including a new opening to the loft area through the current ceiling. are you the property owner: owner of the property property type: terrace what are you looking to convert ...

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02 Aug

Conversion | Loft

London - SW7

Enquiry from: Dave S

Start Date: Immediate

*homeowner new loft conversion for my house please call to appoint

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08 Apr

Conversion | Loft

London - SW18

Enquiry from: Claire C

Start Date: Immediate

loft pod bathroom on rear sloped roof to be lined to the existing dormer loft extension are you the property owner: owner of the property property type: terrace what are you looking to convert the sp...

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23 Nov

Conversion | Loft

London - SW18

Enquiry from: Debbie G

Start Date: Immediate

customer visited the myloftconversionprices.co.uk site and submitted an enquiry. property type: terrace, property owner: owner, looking to convert into: bedroom, work description: l-shaped mansard to...

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29 Sep

Conversion | Loft

London - SW18

Enquiry from: Rosa D

Start Date: Immediate

i want to replace a ladder with stairs to the 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...

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02 Jun

Conversion | Loft

London - SW18

Enquiry from: Victoria R

Start Date: Immediate

Mansard loft extension to include roof terrace

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16 Feb

Conversion | Loft

London - W14

Enquiry from: Cristina J

Start Date: Immediate

i live in a top floor 2 bed flat in earls court central london that has sole access to a loft and 800 sq ft flat roof. I want to create, essentially, a double mansard storey (aka add a whole secon...

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16 Jan

Conversion | Loft

London - SW3

Enquiry from: Ben K

Start Date: Immediate

Loft conversion

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03 Oct

Conversion | Loft

London - SW18

Enquiry from: Phillip T

Start Date: Immediate

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: Yes Do you require any windows: Skyli...

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31 Jul

Conversion | Loft

London - SW18

Enquiry from: Mikkel D

Start Date: 1 to 3 months

Homeowner Please contact to appoint

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01 Jun

Conversion | Loft

London - W14

Enquiry from: Nathan W

Start Date: Immediate

Looking for a cheap refurbishment and demo survey on my loft (terraced house) before doing a loft conversion.

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27 Apr

Conversion | Loft

London - SW6

Enquiry from: Mrs B

Start Date: Immediate

*Homeowner Loft conversion Please call to appoint

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18 Apr

Conversion | Loft

London - SW6

Enquiry from: Robert P

Start Date: Immediate

Extend roof and convert 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: Yes Do y...

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29 Mar

Conversion | Loft

London - W12

Enquiry from: John P

Start Date: Immediate

*Homeowner Loft conversion Supplied and fitted Please call to appoint

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11 Mar

Conversion | Loft

London - SW18

Enquiry from: Bidyut K

Start Date: 1 to 3 months

1270 sq.ft loft conversion Are you the property owner: Relative of Owner Property Type: Detached What are you looking to convert the space into: Other Are you looking to have stairs: Yes Do you requir...

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21 Feb

Conversion | Loft

London - SW18

Enquiry from: Anthony W

Start Date: 1 to 3 months

Customer visited the myloftconversionprices.co.uk site and submitted an enquiry. Property type: Terrace, Property owner: Owner, Looking to convert into: Bedroom, Work description: convert loft space...

Post a similar request >

18 Feb

Conversion | Loft

London - SW18

Enquiry from: Paul M

Start Date: 1 to 3 months

Are you the property owner: Owner of the property Property Type: Terrace Are you looking to have stairs: Yes Do you require any windows: Dormer, Velux Do you require plumbing work: No Do you require e...

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FAQs

do you need planning permission for a loft conversion?

Typically, loft conversions do not require planning permission except in certain situations. They’re usually covered under what’s known as Permitted Development. Certain building works like loft conversion, rear extension and conservatories are granted planning permission by local authorities. Permitted Development, however, gives you a free range to improve your home without having any issues from the councils or regulations. Before your planned loft conversion can be covered under Permitted Development, there are some certain criteria that must be met. This criteria includes the following:

✓ The extension must not go beyond the existing slope of the roof at the front of the house.

✓ The loft space converted must not go beyond 40 cubic metres in a terraced house.

✓ The roof’s height must not be increased by the extension.

✓ The loft space converted must not reach beyond 50 cubic metres in a detached or semi detached house.

✓ The plan for the extension mustn’t involve structures like balconies, verandas or anything other structures of this nature.

✓ The roof extension should be positioned as far back as possible or at least 20cm from the existing eaves.

✓ The side that faces the window openings should be at least 1.7m beyond the floor and the windows should also be obscured.

✓ The roof extension must not overhang the existing roof or wall of the house.

✓ The materials that are to be used must be similar or the same to the materials that has already been used on the house’s exterior.

However, you should bear in mind that there are some properties that are exempt from Permitted Development. Examples of these type of properties include conservation areas, Areas Of Outstanding Natural Beauty and World Heritage sites. Permitted Development does not also provide coverage for listed buildings.

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.

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.

Will I need planning permission to convert my loft?

Planning permission is not normally needed for a loft conversion as they are covered by permitted development rights. A conversion company will tell you if you do and help you with this. For more information, see our article about planning permission.

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Kensington and Chelsea Loft conversion installers are rated 4.4 out of 5 based on 15 reviews of 176 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 Kensington and Chelsea Loft conversion contractors

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