Loft Conversion in Isleworth

Find Loft Conversion Prices in Isleworth

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Loft conversion companies in Isleworth

Interested in loft conversion professionals in Isleworth? Our attic room conversion renovators in Isleworth can provide you the best quotations to have a loft changed in your home.

The installation of a loft space extension in your house can be completed promptly, enabling you to make full use of the altered area and begin benefitting from an added room. The loft area conversion will be carried out by a vetted, certified company and once this has been done you'll be able to begin using the new area right away. With your newly modified attic you'll be able to have an extra bedroom, study or perhaps a rec room.

With a wide variety of loft area alteration styles you'll be ready to discover something that matches your taste, whilst being hassle-free and aesthetically pleasing.

We'll provide you no obligation quotations from loft area alteration companies in Isleworth who will be able to provide you with free surveys and quotations on your conversion. Then you can check these attic conversion prices and guarantee to get the best bang for your buck.

Average Loft conversion cost in Isleworth

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 Isleworth, as reported by local LeadsDoWork members.

Loft conversion installation cost in Isleworth 2026

Labour cost £17,500
Material cost £6,250
Waste removal £1,250
Time frame: 6-12 weeks
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Loft conversion on Google in Isleworth

Google searches that showed Local Quotes, 26 July to 23 October 2026

2,714

Searches that showed one of our pages for Isleworth, all services

Source: Google Search Console, the number of times our pages appeared in Google search results. It counts searches that showed the page, not quote requests.

Loft conversion searches near Isleworth, 26 July to 23 October 2026

729

Searches that showed our page for Egham

273

Searches that showed our page for Feltham

Isleworth

Isleworth is a small town with Saxon origins, located within the London Borough of Hounslow in West London, England. It is discovered to the east of the town of Hounslow and west of the River Thames and its tributary, the River Crane. The town's original settlement area, beside the River Thames, is pertained to as 'Old Isleworth'. The north-west corner of the town, linking on to Osterley and Lampton, is called 'Spring Grove'. Though Isleworth originally had a Thames frontage of around one mile, excluding that of the Syon estate, a borough limit realignment in 1994 lowered this to half a mile in order to increase land in the district of St. Margarets, Twickenham. Isleworth featured a significant range of artisan and white collar residential progression throughout the town, at the cost of numerous market gardens in the beginning of the 20th century. This period also experienced the building of a number of brand-new factories and offices. Such a quick spread of building changed the nature of Isleworth's design, transforming the town from an agrarian economy to an urban one. Because of many buildings avoiding being targeted in the Blitz, Isleworth contains numerous Grade II * listed buildings. The majority of these originate from the period of considerable mansion-building happening in the 18th and 19th centuries, thanks to the attraction of the rural, waterside beauty. There is a public library, a public leisure centre with a pool and gymnasium, four entertainment grounds and a town hall for the 20500 occupants to check out, along with plenty of opportunities to go shopping at nationwide and independent shops. For all your home upgrades, make certain to make use of trusted specialists in Isleworth to make certain of quality.

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Loft conversion pros in Isleworth

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

Loft Conversion 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

Loft Conversion 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

Loft Conversion in London

Nice guy

A1 Forever Solutions LTD

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

Latest review

Peter M., TW7
4

Loft Conversion in Isleworth

Waiting for the appointment

Similar Customer Enquiries for Loft conversion in and around Isleworth

29 Sep

Loft conversion

London - SW16

Enquiry from: Katherine S

Start Date: Immediate

Need a set of stairs up to attic full install. would like the stairs to be the right size and height that would allow the attic to act as a second bedroom

Property: detached

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15 Jul

Loft conversion

Wembley - HA9

Enquiry from: Esther K

Start Date: Immediate

I am planning to convert loft into office space. Need to install stairs to loft. Thank you. Esther

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11 Jun

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Mitcham - CR4

Enquiry from: Matthew R

Start Date: Immediate

Plaster boarding out wall /Ceiling flooring etc etc

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04 Mar

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Mitcham - CR4

Enquiry from: Shedley R

Start Date: Immediate

Need a loft conversion to finish plaster boards out ceiling and flooring including toilet to complete

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24 Feb

Loft conversion

London - SE23

Enquiry from: Maria B

Start Date: Less than one month

Roof: pitched · Property: terrace · Built: 1900-1930 · Height: 3rd floor+

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05 Nov

Loft conversion

Harrow - HA3

Enquiry from: Viju U

Start Date: Immediate

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31 Oct

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New Malden - KT3

Enquiry from: Murugathas S

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29 Oct

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London - N2

Enquiry from: Shimon S

Start Date: Immediate

Property: terrace

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29 Oct

Loft conversion

Northolt - UB5

Enquiry from: Adel M

Start Date: Immediate

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25 Oct

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London - SE20

Enquiry from: Hayelom T

Start Date: Immediate

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20 Oct

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Hayes - UB4

Enquiry from: Islamuddin M

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14 Oct

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Thornton Heath - CR7

Enquiry from: Patrick W

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12 Oct

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London - W3

Enquiry from: Ozzie R

Start Date: Immediate

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11 Oct

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Wembley - HA0

Enquiry from: Darrell M

Start Date: Immediate

Property: terrace

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08 Oct

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Hayes - UB3

Enquiry from: Ali N

Start Date: Immediate

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08 Oct

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Uxbridge - UB10

Enquiry from: Hanzalah H

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08 Oct

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London - N17

Enquiry from: Brinda J

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07 Oct

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Hounslow - TW4

Enquiry from: Naveen K

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01 Oct

Loft conversion

East Molesey, West Molesey - KT8

Enquiry from: Kamel A

Start Date: Immediate

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27 Sep

Loft conversion

Hounslow - TW3

Enquiry from: Nasreen S

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FAQs

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.

what is a hip to gable loft conversion?

This is a type of loft conversion that extends your roof on the sloping side. It is a great option to go for especially where a hipped roof effectively makes the usable floor area a lot smaller which can be a tricky affair when it comes to putting in a new staircase. Here, the roof is extended from the current ridge in such a way that it effectively fills the gap between them. As a result, this turns the hip (in a hipped roof) into a gable to create space in your roof for a loft conversion - hence the name “hip to gable.

The new gable can be done in whatever way that suits both your taste as well as your property. You can make the new gable construction in woods and then tiled to match your existing roof while you can also go for other options such as brick block pebbledash or rendering. You are also free to fit in a new window into the loft conversion end so as to allow for natural light into the loft space.

A hip to gable loft conversion is mostly found on both semi detached and end terrace buildings, particularly those constructed in the 1930s. Overall, this type of loft conversion is particularly ideal for homes that features a hipped roof and with a sloping roof at the side of the property. Some detached properties can also possess a hipped roof on the side - and as such, a double hip to gable loft conversion can also be deal as it’ll create more loft space for usage. If your home fits into the bill, then you should be aware that once the project is completed, you’ll have plenty of usable space available to both you and your loved ones.

how much value does a loft conversion add?

When its impossible to build out and create more space sideways, why can’t you look upwards? As more and more homeowners in the UK are carrying out their loft conversion project, one question that keeps popping up is the amount of value the loft conversion can add to their homes. However, this is a question that is impossible to provide a single and precise answer to. This is because the value that’ll be generated by a loft conversion is largely dependent on a wide range of influencing factors. To give you a vague idea of the loft conversion value to a property, we’ve put forward a research carried out by industry experts so you can know what you’re in for.

Nationwide carried out a research which shows clearly that a loft conversion including an additional bedroom as part of the building plan will increase a house’s value by up to 21 percent. Since the number of rooms a house has is one of the main metrics for house valuations, loft conversion comes in pretty handy as it’s a great and easy way to convert your house from a 4 bedroom house to a 5 bedroom house prior to sale.

Apart from the financial value aspect, loft conversion also adds more value to your lifestyle which is very unlike nearly other financial investments you can make. More space in your house automatically means more storage or a new room as you wish. A new room can be for a growing family or probably to serve as a guest room. It can also be used as a study space or even an office especially with the rapidly growing rate of people working from home. With loft conversion, the possibilities in terms of value are simply endless!

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.

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