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 2026

Avg. price low

Avg. price low
£29,688

Avg. price

Avg. price
£47,500

Avg. price high

Avg. price high
£64,688

£65200

£48900

£32600

£16300

£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 2026

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

Loft conversion searches in June 2026

Loft conversion Projects in Kensington and Chelsea in May 2026

0

Requests for quotations in Kensington and Chelsea in May 2026

0

Requests for Loft conversion quotations in Kensington and Chelsea in May 2026. 0% change from April 2026.

5,400

Requests for Loft conversion quotations in London County in May 2026. 0% change from April 2026.

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

Loft conversion searches in cities and towns near Kensington and Chelsea May 2026

145

Requests for quotations in Westminster in May 2026

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

What kinds of loft conversion are there?

There’s a huge range of different types of loft conversions. The most common are dormer and skylight or Velux conversions. There are also hip to gable and mansard conversions. The type of loft conversion that’s most suitable for your property will depend on the style of roof and the size of your loft.

how disruptive is a loft conversion?

Asides the questions relating to planning permission of a loft conversion as well as the total cost of completing a loft conversion project, this is perhaps the most common question on the loft conversion subject matter. Before making an investment decision, many homeowners will want to know just how disruptive a loft conversion is. Well, we’ve all heard the several horror stories when loft conversion builder with dirty boots tramples all over the fresh and just-acquired shag pile or the noise of the construction loud enough to annoy neighbours from four blocks away or an obvious shortage of teabags, sugar and lots more. Good news is, the disruption of loft conversion is not as bad as people make out. Let’s have a look at how it works!

Just like all other major building projects, a loft conversion is disruptive to your property. However, no two loft conversions are the same, therefore some are certain to be more drastic and invasive than others. In the long run, the project is worth the stress and inconveniences caused and in most cases, it’s usually a very good investment.

Normally, an average loft conversion is expected to last for about 9 to 12 weeks (depending on the complexity of the loft conversion project some might take longer). Some of the factors that affects the duration of a project includes the type of the loft, the design of the loft as well as the style of the property.

Generally, a loft conversion is a lot less disruptive than say completely moving a home. It all has to do with how you’re able to deal with it as a person. And besides, the effect it’s going to have to a large extent depends on the company you hire. A good company will always look to ensure to keep disruptions to a minimal when carrying out the loft conversion project.

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.

what is a dormer loft conversion?

A dormer loft conversion is a type of loft conversion that’s built making use of a roof’s existing slope. In other words, it’s an existing roof’s extension which is constructed in such a way that allows for an additional floor as well as head room especially suitable for lofts lacking good amount of usable space. The dormer loft conversion is simply an addition to the existing roof looking much like a box-like build constructed onto a pitched roof as it creates walls that are vertical to the slope while also being 90 degrees to the floor.

This type of loft conversion is the most common amongst homeowners in the UK mainly because it represents a cost effective means through which you can add an additional usable space to your home or property. The structure extends for the slope of the existing roof and can easily be altered to suit various tastes or styles. Furthermore, if you’re looking for a type of loft conversion that aids to foster reduced disruption to work, then dormer loft conversion is also your best bet. This is due to the fact that the structure is built from a scaffolding made outside a home.

There are different types of dormer loft conversion and the one which will best suit your property will depend on the property type, be it detached, semi detached or terraced as well as the existing roof shape and size. The dormer loft conversion is a popular choice for a lot of homeowners for a variety of reasons. Let’s have a look!

✓ It’s very cost effective

✓ The dormer loft conversion does not require planning permission so far it complies with certain conditions and limitations

✓ It adds an extra headspace as well as floor space.

Loft conversion

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Kensington and Chelsea Loft conversion installers are rated 4.4 out of 5 based on 15 reviews of 134 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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