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Verified ProOver 50 Reviews

JM Fencing and Landscaping

89 review(s)
Offers services in ISLEWORTH
Mitchell Landscaping have been established for 10 years, offering quality advice and services in landscaping, Gardening a...
Verified Pro

Haas Home Extensions Group

0 review(s)
Offers services in ISLEWORTH
Welcome to Haas Extension Group, where we take pride in being the premier suppliers, installers, and design consultants of...
Verified ProOver 10 Reviews

Stoneartuk

14 review(s)
Offers services in ISLEWORTH
Hi my name is Martin from stone art uk ltd we are a local run landscaping company within the Pinner area we specialise in ...
Verified ProOver 10 Reviews
Welcome to Home Counties, our team handle projects large and small from residential to commercial. Our Driveway service...

Recent Builder Enquiries

15 Oct

Insulation | External Wall

Isleworth - TW7

Enquiry from: Arvind G

Start Date: Immediate

External wall Insulation.

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16 Oct

Insulation | Loft / Roof

Isleworth - TW7

Enquiry from: Thurairajasingam R

Start Date: Immediate

External wall insulation Lead

insulate the loft area. no water tank or any other items. ceiling lights will need to be covered to release heat with appropriate caps. are you the property owner: owner of the property property type...

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16 Oct

Insulation | Cavity Wall

Isleworth - TW7

Enquiry from: Thurairajasingam R

Start Date: Immediate

customer made an enquiry for cavity wall insulation and confirmed on the quotatis site they would like quotes from a builder.mr lives in the isleworth area and would like a call to discuss options.see...

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03 Apr

Conversion | Loft

Isleworth - TW7

Enquiry from: Kunal R

Start Date: Immediate

homeowner loft conversion please call to appoint

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31 Mar

Conversion | Loft

Isleworth - TW7

Enquiry from: Kunal R

Start Date: Immediate

homeowner loft conversion please call to appoint

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04 Oct

Insulation | Cavity Wall

Isleworth - TW7

Enquiry from: Sunil S

Start Date: Immediate

Cavity wall insulation quote

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24 Nov

Building work | General

Isleworth - TW7

Enquiry from: Mgconstruction G

Start Date: Immediate

need 50sqm price please the area its 7mx7m ground floor extation

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17 Oct

Conversion | Garage

Isleworth - TW7

Enquiry from: John M

Start Date: Immediate

convert existing rear garden garage to a self contained granny annexe. does local planing allow this? are you the property owner: owner of the property do you have a: double garage what will the spac...

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01 Sep

New Build | Residential

Isleworth - TW7

Enquiry from: Zen B

Start Date: 1 to 3 months

customer made an online enquiry for new build homes and confirmed on sms and email they would like a call with a builder to discuss prices.please call to arrange an appointment to quote. are you the p...

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23 Aug

Building Work | Porch

Isleworth - TW7

Enquiry from: Neetu B

Start Date: Immediate

a upvc porch in black or anthracite grey. no brickwork, just glass and upvc. are you the property owner: owner of the property do you have planning permission: yes what material are you looking for: u...

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26 Oct

Insulation | Cavity Wall

Isleworth - TW7

Enquiry from: Christopher S

Start Date: Immediate

are you the property owner: relative of owner property type: semi detached how many bedrooms do you have: 3-4 property age: 1970-2000 what is your current source of heating for the renewable incentiv...

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16 Sep

Insulation | External Wall

Isleworth - TW7

Enquiry from: Martin L

Start Date: Immediate

are you the property owner: owner of the property property type: terrace how many bedrooms do you have: 1-2 what is the direction of the roof: south current source of heating: electric other forms: g...

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14 Sep

Building Work | Porch

Isleworth - TW7

Enquiry from: Sneha S

Start Date: Immediate

Are you the home owner of that property? YES Are you replacing an existing porch or is this a new build? replacement What material do you require, UPVC? Brick and UPVC What colour do you want it to be...

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09 Sep

Insulation | External Wall

Isleworth - TW7

Enquiry from: Martin L

Start Date: Immediate

are you the property owner: owner of the property property type: terrace how many bedrooms do you have: 1-2 what is the direction of the roof: south current source of heating: electric other forms: g...

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11 Feb

Building Work | Porch

Isleworth - TW7

Enquiry from: Jeremiah H

Start Date: Immediate

Are you the home owner of that property? yes Are you replacing an existing porch or is this a new build? new build What material do you require, UPVC? UPVC What colour do you want it to be? Rosewood I...

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03 Feb

Building Work | Porch

Isleworth - TW7

Enquiry from: Jeremiah H

Start Date: Immediate

Are you the home owner of that property? yes Are you replacing an existing porch or is this a new build? new build What material do you require, UPVC? UPVC What colour do you want it to be? Rosewood I...

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24 Dec

Building Work | Porch

Isleworth - TW7

Enquiry from: Khadijah B

Start Date: Immediate

Front porch Are you the property owner: Owner of the property Do you have planning permission: No What material are you looking for: uPVC What material would you like the roof made from: Clear Roof ...

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09 Dec

Building Work | Porch

Isleworth - TW7

Enquiry from: Khadijah B

Start Date: Immediate

Front porch Are you the property owner: Owner of the property Do you have planning permission: No What material are you looking for: uPVC What material would you like the roof made from: Clear Roof ...

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22 Aug

House Extensions

Isleworth - TW7

Enquiry from: Chawla K

Start Date: Immediate

outbuilding size 7m x 7m built with red bricks and red tiles roofing

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06 Jan

House Extensions

Isleworth - TW7

Enquiry from: Andre S

Start Date: Immediate

Kitchen extension with bathroom Are you the property owner: Owner of the property Property Type: Semi detached Looking For: Single storey extension Do you have planning permission: No Do you have plan...

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How much do Builder services cost?

How much do Builders cost? Prices for Builders in 2025 can fluctuate relying on the sort of work that you need to have carried out in your residence.

Are you planning to erect a new house or structure? If yes, then you’d probably want to know just how much it’ll take to get the project over the line to help you set a budget and start to plan. Building a new house is requires huge financial investment and as a result, there’s the need to carry out your due diligence before you proceed. In this post, we’re going to give you an insight into the prices charged by builders to erect a new home or structure.

First and foremost, like every other home project, the price charged by builders to construct a new house or structure depends on a wide range of factors. These factors include the size, location, accessibility as well as qualifications of the builders you wish to employ just to mention a few. For instance, you’d expect the cost of building two-storey in London to be a lot more expensive than the price of a one-story building in Scotland. However, we’ll try our best to give you an idea of the price range you can expect to incur to complete your project.
In general, a builder will charge within the range of £10 to about £15 per hour on the average. For small building projects which includes wall and foundations repairs, a builder will typically charge about £11 per hour. However, the price charge will depend on the extent of the job due to the fact that simple tasks such as repointing only costs about £10 per hour, while laying new foundations can cost up to £15 per hour.

The table shows the types of work that Builders typically do and the average cost range of these tasks. Some tasks take longer to finish than others so prices do fluctuate by job.

View our Builder cost guide View our Builder advice

The average price
of a Builder in Isleworth is:

£25,065

Builder job Builder cost in 2025
Garage conversion in Isleworth £9,750-£18,450
Loft conversion in Isleworth £31,250-£67,917
House extensions in Isleworth £32,400-£75,600
Loft insulation in Isleworth £450-£690
Upvc or wood porch in Isleworth £2,625-£4,025
Barn conversions in Isleworth £112,500-£172,500
Basement renovation in Isleworth £30,000-£46,000
Bedroom fitting in Isleworth £1,500-£2,300
Bricklayers in Isleworth £300-£460
Cavity wall insulation in Isleworth £400-£820
Commercial new builds in Isleworth £105,000-£161,000
Conservatory base in Isleworth £675-£1,035
Building maintenance in Isleworth £2,250-£3,450
Building insurance works in Isleworth £2,250-£3,450
Pebble dashed walls in Isleworth £2,000-£9,200
Plasterboard dry lining in Isleworth £638-£978
Residential new builds in Isleworth £105,000-£161,000
Restoration and refurbishment in Isleworth £37,500-£57,500
Roof insulation in Isleworth £7,500-£11,500
Underpinning in Isleworth £2,250-£3,450
Wall cladding in Isleworth £1,125-£1,725
Wall rendering in Isleworth £3,750-£5,750
Demolition in Isleworth £2,440-£3,660
Roof room in Isleworth £15,000-£23,000
Shop refurbishment in Isleworth £3,750-£5,750
Single storey house extension in Isleworth £21,600-£37,400
Soundproofing in Isleworth £900-£1,380
Driveway repair in Isleworth £1,520-£2,280
Garden room in Isleworth £6,400-£9,600
External wall insulation in Isleworth £6,000-£15,000

Related Builder searches in Isleworth

Builder FAQs

How long does it take to install insulation?

How long it takes to install insulation will depend on the size of your property. In general, loft and cavity wall insulation can be installed in a day or two. External wall insulation will usually take longer to install. The rep or installer will be able to advise you when quoting for the job how long this will be.

Are barn conversions VAT exempt?

If you’ve converted a non-residential barn into a home, you might be able to reclaim some of the VAT that you’ve paid for your project. This includes money spent on:

• Construction materials

• Flooring

• Light fittings

• Kitchen units and worktops

• Electrical, heating and plumbing materials

To reclaim your VAT from HMRC, make sure you request and keep all of your invoices. You’ll also need proof of planning permission and evidence of completion. You should then submit your claim with all relevant paperwork within three months of receiving your completion certificate. You’re only allowed to submit one claim, so you’ll need to make sure you get it right first time.

Are barn conversions a good investment?

A barn conversion can be a great investment for lots of reasons. When done well, barn conversions can be great at holding their value, meaning you could sell yours for a great price. They can also look fantastic, often with period features coupled with large areas of glazing. This can make them a great place to live, especially if you enjoy being in the countryside.

However, barn conversions do have their disadvantages. They may require extensive renovation work to bring their energy efficiency levels up to standard, which can be very expensive. It’s also important to be aware of their location – they might be on a working farm or close to several other converted buildings.

It’s essential to get a survey conducted before you buy a barn you plan to convert. This can tell you about any structural problems it might have and give you an indication of whether you might be able to get permission to convert it. You can also buy barns with planning permission already in place.

Does cavity wall insulation lead to damp problems?

Insulating a cavity wall should not affect the damp proofing of the wall. All insulation approved for use in cavity walls has been tested to ensure that it does not allow damp to pass through the wall. Some walls which receive a lot of wind driven rain are unsuitable for cavity wall insulation.

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!

Can I extend my barn conversion?

Generally, it’s possible to extend a barn conversion, but there are certain conditions that you’ll probably need to meet. Ultimately, it’s up to your local planning office to decide whether to approve your planned barn conversion extension or not.

Typically, small extensions on the side of a barn conversion are often approved, particularly if they serve to preserve the original character of the barn. This could be because the extension will mimic the appearance of the original structure, or house facilities that would look odd in the original building.

However, you probably won’t be allowed to build a larger extension, or one that isn’t in keeping with the appearance of the original barn.

how thick should loft insulation be?

Over the years there has been an increase in the recommended thickness of loft insulation by the government. Obviously, the reason behind this is pretty simply - the thicker the layer of your loft insulation the bigger your savings. The UK government is very keen to every house in the country to have loft insulation fitted where possible as it helps to minimize the heating demands of these properties. Households get to benefit from loft insulation in so many ways which includes reduced energy energy bills as well as having a home that stays at a more comfortable temperature for longer.

 

Generally, for the government energy efficiency is crucial as it implies that the highest demand ( which is usually the time of the day when gas or electricity use is at its peak ) reduces, since each building requires slightly less energy. Overall, that ultimately implies that new power plants don’t have to be built which is some nice cost savings for the government.

 

In the 1980’s, any thickness of loft insulation from 25 mm to 50 mm was considered the standard. But then, building regulations stated that homes should have as much as 100 mm of loft insulation. Over time, this gradually increased to 270mm for new builds and also recommended for other properties, although not essential. As a result of this, there’s always a need to check how much insulation you currently have in your loft before you decide to purchase more. You may discover that you already have something within the range of 20 mm to 200 mm up there and knowing this and the insulation values will assist in determining how much more you’ll need to purchase, if any at all. You should also note that some modern materials can offer the same thermal insulation whilst not being as thick.

Are barn conversions cold?

If you’re considering converting a barn or buying one, you shouldn’t need to worry about it being cold. This is because building regulations dictate that when you convert a barn, you need to insulate it to meet specific standards. However, it’s worth considering its heating system and ceiling heights carefully – some barn conversions are likely to take longer and be more expensive to heat up than others.

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