Find a Builder you can trust in Harrow.

Choose from 451 Builders, all rated by people like you.

Over 364 reviews & an average rating of 4.3/5 stars, you'll find the right pro

Choose and shortlist

Use the shortlist button to select up to 4 tradespeople, enter your project details and press send

or

Keen to get on with the job?

Get up to 4 quotes from local Builders near you

View Shortlist
Verified ProOver 50 Reviews
Mitchell Landscaping have been established for 10 years, offering quality advice and services in landscaping, Gardening a...
Verified Pro
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 HARROW
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 Pro

Loft & Build

0 review(s)
Offers services in HARROW
We can cover all aspects of a loft conversion and extensions. If you require, we can also design the project including dr...
Verified Pro

Bentham Builders

0 review(s)
Offers services in HARROW
At Bentham Builders, we specialize in high-quality roofing services as well as general building work across North and West...

Recent Builder Enquiries

07 Mar

Conversion | Garage

Harrow - HA2

Enquiry from: Shanth K

Start Date: Immediate

I want to covert my garage into studio

Post a similar request >

23 Jan

House Extensions

Harrow - HA1

Enquiry from: Mahmood K

Start Date: Immediate

Flat roof kitchen extension at rear. Labour only builder required. All my material

Post a similar request >

11 Aug

House Extensions

Harrow - HA2

Enquiry from: Archit J

Start Date: Immediate

Rear extension squaring off. We have half of the width of the house already extended to the rear. Now want to square it off by extending the remaining ~4 meter width to similar 6 meter depth. So area ...

Post a similar request >

05 Apr

Interior work | Stud Walls

Harrow - HA3

Enquiry from: Praful P

Start Date: Immediate

one partition wall to be removed and another new to put up

Post a similar request >

22 Aug

Insulation | Cavity Wall

Harrow - HA3

Enquiry from: Manji K

Start Date: Immediate

customer has a insulation project they are looking to have done, specially they want quotes for cavity wall insulation. they are unsure of options so would like to discuss with a builder.confirmed int...

Post a similar request >

14 Jun

Insulation | External Wall

Harrow - HA2

Enquiry from: Carol C

Start Date: Immediate

External wall insulation. Terraced house.

Post a similar request >

23 Feb

New Build | Residential

Harrow - HA3

Enquiry from: Odagiu G

Start Date: Immediate

My name is George and im Consultant at Visla Recruitment agency,we are specialized in Construction Sector what we bring to the table in a posibile cooperation : -Large and stable data base of expe...

Post a similar request >

29 Jan

Conversion | Loft

Harrow - HA2

Enquiry from: Kevin B

Start Date: Immediate

looking at the possibility of changing existing older style loft extension to dormer style loft extension. looking for advice, costs and timescales for consideration. are you the property owner: owner...

Post a similar request >

06 Dec

House Extensions

Harrow - HA3

Enquiry from: S Nasir Z

Start Date: Immediate

customer has a extensions & conversions project they are looking to have done, specially they want quotes for house extension. they are unsure of options so would like to discuss with a builder.confir...

Post a similar request >

14 Nov

Conversion | Loft

Harrow - HA3

Enquiry from: Aurelia L

Start Date: Immediate

upgrade velux to dormer. the sellers have had a loft conversion done in 2020 (without building regs and planning permissions) so we would like to rectify this and apply for full permissions for this p...

Post a similar request >

06 Nov

Conversion | Loft

Harrow - HA2

Enquiry from: Ashish J

Start Date: Immediate

I looking for an architect to prepare a drawing for the loft conversion and the extension in the back garden and take permission from the Harrow council.

Post a similar request >

22 Oct

Conversion | Loft

Harrow - HA2

Enquiry from: Ashish J

Start Date: Immediate

I looking for an architect to prepare a drawing for the loft conversion and the extension in the back garden and take permission from the Harrow council.

Post a similar request >

25 Sep

Building Work | Porch

Harrow - HA1

Enquiry from: Gyguyugu Y

Start Date: Immediate

build a porch in front of the house what material would you like the roof made from: tile what material are you looking for: wood what material are you looking for: what material would you like the r...

Post a similar request >

24 Sep

Driveway Repair

Harrow - HA3

Enquiry from: Nik P

Start Date: Immediate

Inspect cause of damage. Assessment of damage; raised paving, suspected tree damage. Re-level paving slabs.

Post a similar request >

22 Sep

Building work | Refurbishment

Harrow - HA1

Enquiry from: Ranjth R

Start Date: 1 to 3 months

refurbishment of 3 bed terraced house in stantonbury, milton keynes. new kitchen, bathroom, and decor throughout. painting and new flooring. new wiring and plumbing too. possible flooring of the loft ...

Post a similar request >

06 Sep

Driveway Repair

Harrow - HA3

Enquiry from: Nik P

Start Date: Immediate

Inspect cause of damage. Assessment of damage; raised paving, suspected tree damage. Re-level paving slabs.

Post a similar request >

13 Aug

House Extensions

Harrow - HA3

Enquiry from: Parul K

Start Date: Immediate

customer made an enquiry for house extension and confirmed on the quotatis site they would like quotes from a builder.mrs lives in the harrow area and would like a call to discuss options.see below de...

Post a similar request >

12 Aug

Interior work | Stud Walls

Harrow - HA1

Enquiry from: Guy M

Start Date: Immediate

hello, i am looking for 2 stud walls and ceiling to be installed to make a 120x260cm room with rockwool insulation and a glass window on one side. how much would this cost approximately? thanks, guy a...

Post a similar request >

06 Aug

New Build | Residential

Harrow - HA2

Enquiry from: Janaki G

Start Date: Immediate

customer in the harrow area made an enquiry a couple of projects including new build homes.call anytime and arrange an appointment to discuss. below is some details about this project: are you the pro...

Post a similar request >

08 Jun

Building work | Sound Proofing

Harrow - HA2

Enquiry from: Tony M

Start Date: Immediate

ceiling in frontroom and kitchen soundproofed are you the property owner: tenant (with permission) property type: other how many rooms are you looking to have sounds proofed: 2 rooms what level of ser...

Post a similar request >

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 Harrow is:

£25,867

Builder job Builder cost in 2025
Garage conversion in Harrow £9,750-£18,450
Loft conversion in Harrow £31,250-£67,917
House extensions in Harrow £32,400-£75,600
Loft insulation in Harrow £450-£690
Upvc or wood porch in Harrow £2,625-£4,025
Barn conversions in Harrow £112,500-£172,500
Basement renovation in Harrow £30,000-£46,000
Bedroom fitting in Harrow £1,500-£2,300
Bricklayers in Harrow £300-£460
Cavity wall insulation in Harrow £400-£820
Commercial new builds in Harrow £105,000-£161,000
Conservatory base in Harrow £675-£1,035
Building maintenance in Harrow £2,250-£3,450
Building insurance works in Harrow £2,250-£3,450
Pebble dashed walls in Harrow £2,000-£9,200
Plasterboard dry lining in Harrow £638-£978
Residential new builds in Harrow £105,000-£161,000
Restoration and refurbishment in Harrow £37,500-£57,500
Roof insulation in Harrow £7,500-£11,500
Underpinning in Harrow £2,250-£3,450
Wall cladding in Harrow £1,125-£1,725
Wall rendering in Harrow £3,750-£5,750
Demolition in Harrow £2,440-£3,660
Roof room in Harrow £15,000-£23,000
Shop refurbishment in Harrow £3,750-£5,750
Single storey house extension in Harrow £21,600-£37,400
Soundproofing in Harrow £900-£1,380
Driveway repair in Harrow £607-£51,140
Garden room in Harrow £6,400-£9,600
External wall insulation in Harrow £6,000-£15,000

Related Builder searches in Harrow

Builder FAQs

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.

when is underpinning required

If you’re currently experiencing some structural issues with your building or property and you’ve heard a thing or two about the several benefits associated with getting underpinning done, you may be wondering if underpinning might just be the answer to your worries. Well, one thing you should when it comes to underpinning is the fact that, while there are some structural issues that may actually warrant an underpinning job, there are also some situations that can not be fixed by underpinning. In this post, we’re going to consider the events whereby underpinning of your house will be required. Let’s take a look!

First and foremost, you should know that underpinning isn’t required for issues related to slab heave. Footing movements which are likely to reverse normally occur when the content of the soil moisture changes unevenly which gives rise to slab heave. This movement results for a reversible effect.

Generally, underpinning is done to remedy problems related with the movement of the footings of a building or property, but as stated above – not all movements require underpinning. So, when is underpinning required? More often than not, a situation that’s resolved by underpinning is the event whereby the footings of a building or structure drops or subside as a result of some reasons that are irreversible. For example, footing movements caused by a footing set on a soft or loose soil which may be irreversible.

In the event whereby the footings of your house haven’t been installed as deep as required during the initial construction, then you will need to have your building underpinned to make it more stable. If you’re also looking to increase the load on your foundation like adding another storey, you may also need to have your house underpinned to support the extra weight added.

Why has my driveway cracked?

Driveway surfacing materials like concrete, asphalt and clay brick usually crack because they’ve been exposed to extreme temperatures or put under high pressure. It’s important to repair driveway cracks before they get worse and cause damage to vehicles and perhaps others to trip on raised cracks.

How much is plasterboard?

How Much Is Plasterboard?

Do you wish to install plasterboard in the nearest future? If yes, then you’d probably want to know the amount it’s going to cost. Here, we’ll give you a detailed plasterboarding prices breakdown to help you calculate an estimate for your project.

A plasterboarding project including the cost of both materials and labour with the use of a high quality panels is about £4 to £5 per panel. Therefore, if you wish to calculate on the basis of a standard room about 12x12ft would cost about £500 to £600. However, this price can fluctuate significantly depending on the professional as well as the quality of the materials you wish to incorporate in completing the project. We’d recommend that you hire the services of a professional with accreditation as he would provide you with a detailed quote with no hidden charges or costs. To give you a clearer idea, we’ve taken the time out to put together some estimated costs of employing the services of a seasoned professional plasterer to supply and plasterboard your home or office. Let’s take a look!

• A 6 x 12ft room with panels and plasterboard should have an average cost within the range of £250 to £400 and duration of one to two days.

• The individual cost of plasterboarding or drywalling a standard 12 x 12ft room should have an average cost within the range of £500 to £600 and duration of one to three days. These includes 60% for materials used (£330), 30% for tradespersons (£165) and the remaining 10% for waste removal (£55) to give a total cost of £550.

• A 12 x 24ft room with panels and plasterboard should have an average cost within the range of £1000 to £1200 and duration of three to six days.

Can a mortgage include renovation costs?

In a nutshell, a mortgage loan is for the acquisition of an asset, so lenders won’t tend to give you anything else in a mortgage that is going to cover your home renovation costs. When you are applying for your mortgage, your provider will examine the price of your new household. For example, if you’re planning to buy a property for £200,000, but you need another £50,000 to help improve it, you’ll find that your lender might turn you down.

Essentially, with any mortgage loans that you take out on your possessions, the bank or creditor theoretically owns your home till you’ve entirely paid off your loan, which is why it is very unlikely that you will get extra funds from them. There are some mortgage providers who will be willing to add on some building costs, but it is entirely up to you whether to choose it or not.

With most mortgages, banks and other lenders will usually give you a maximum of 95% of what you purchased your property for. That means, that even if you contemplate the household has the probability to be valued at so much more, you’ll have to find an alternative way of paying for the developments you have in attention. So, if the accumulation of extra funds on to your mortgage loan is out of the question, you’ll need to find additional ways of paying for the home developments.

It is well and good if you have the cash saved up, or else, you can explore other payment options which your bank or lender may be able to help you with. There are several methods by which you can collect the cost to pay for the improvements, from personal loans to credit cards or even overdrafts, there are tons of ways to lending money. Keep in mind these are all forms of debt so keep an eye out for the interest rates when you are repaying.

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.

can you repair resin driveways?

Being a strong and durable product requiring little maintenance and expected to last over 2 decades, it’s little wonder resin is now a popular material amongst homeowners in the UK to build their driveways. However, there’s always the issue of the driveway fading, cracking or even becoming worn and tired. So is it possible to repair resin driveways? The answer is yes, a resin driveway can be repaired, however the best approach to use largely depends on the issue being faced. As a confident DIYer it’ll be very easy to do, but if you lack the confidence then calling in a professional for help would be a better option. So let’s take a look at how you can repair your resin driveways.

For cracks, the best reparation approach would be to chisel it out. Once done, then you can proceed to breaking the stones to form a rough edge. It’s important to make sure that the matrix of the stone remains unaffected. Make a new mixture of resin bound stone and pack it in tightly to the gap. While doing this, we’ll recommend making use of a plastic trowel to avoid burnishing. This fresh mixture will then create a smooth and perfect surface by interlocking with the edges. You can follow similar procedure for patches but these are larger holes or damages than cracks and as the name suggests are mostly likely to remain noticeable but will prevent further crumbling of your resin driveway.

For homeowners, who aren’t so keen about the patch repairs, you can opt for an overlay especially in the event whereby the majority of the surface has failed. Although many usually shy away from this approach because of the perceived high expenses, but the fact is that the approach is actually cost effective as you won’t have the need to spend more money in the long run.

how to tile a porch roof?

Tiling a porch roof is a very important but laborious and difficult task. A project of this magnitude will require a large investment in planning and preparation way before the actual installation process takes place. It can be a brand new porch roofing tile or a replacement of the existing one, either way it’s crucial to get the right technique. If you lack proper training or experience in this field, we’d recommend you hire the services of a reliable professional probably within your local area to guarantee the best results and to save yourself some time and money. This guide will give you a good insight into the porch roof tiling process. Let’s have a look!

• With the crown looking upwards, put the first tile on the batten and centre the tile from side to side.

• Hammer a 10d nail at the base of the tile and into the batten (make sure not to overdrive the nail).

• To provide a much needed support, apply a little mortar under the first tile.

• Identify the inner end of the first tile and place another tile on top. Take a measurement from the outer end and adjust the end of the second tile to fit.

• Just like you’ve done with the first tile, nail the second tile into the batten.

• Position two tiles at the both ends of the ridge and proceed with the installation just as you’ve done with the previous tiles.

• Take a measurement of the distance across the ridge from the first tile’s outer end. Once done, you can then calculate the number of tiles required by subtracting 16 inches from your measurement and divide the answer by 8.

• Beginning at the second tile on one end of the ridge, install the half the number of ridge tiles towards the centre of the ridge. Now install the remaining tiles working from the opposite end to the ridge’s centre. At the centre of ridge should be a key tile with mortar.

Builder help and advice

How it works

Tell us about your Builder project

Answer a few quick questions to help us match you with the right Builder

Get up to 4 free quotes

Receive no-obligation quotes from 4 Builders working in Harrow.

Pick the right pro for you

Compare prices, customer reviews and services, and hire the right Builder.

Are you a Builder in Harrow?

View our open Builder jobs near you

Join today
View Shortlist