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Verified ProOver 20 Reviews

CRS Contractors

20 review(s)
Offers services in KNEBWORTH
we Are a family run business with over 30 years experience built on reputation Our services include all types of roofing...
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James building & roofing Cambs Offer the complete professional construction services . We specialise in extensions, loft...
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Loft & Build

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

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Offers services in KNEBWORTH
Coastal Prime Ltd provides expert home insulation services across the UK, helping homeowners enhance energy efficiency and...

Recent Builder Enquiries

20 May

Conversion | Loft

Knebworth - SG3

Enquiry from: Chris M

Start Date: Immediate

Customer made an enquiry for Loft Conversion via one of our websites. Looking at various options they would like to discuss directly Confirmed interest Please call to discuss and arrange appointment t...

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02 Oct

Building work | Bricklaying

Knebworth - SG3

Enquiry from: Steve P

Start Date: Immediate

rebuild retaining wall of front drive are you the property owner: owner of the property property type: semi detached how much work would you say needs to be done: medium job do you require the brick...

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13 Sep

Insulation | Loft / Roof

Knebworth - SG3

Enquiry from: Steve H

Start Date: Immediate

I have a 3-bed detached house in Knebworth, with loft insulation of 100mm depth and no cavity wall insulation. The property will be empty on 17th Oct. while I find a new tenant and I am looking to im...

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29 Nov

House Extensions

Knebworth - SG3

Enquiry from: Joanne R

Start Date: Less than one month

Hi, We are in the process ofbuying a property in Knebworth and are looking at prices for a double story extension to the side of the house, we would like to create a master en-suite bedroom upstairs a...

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04 May

Conversion | Loft

Knebworth - SG3

Enquiry from: Chris M

Start Date: Immediate

loft conversion bedroom with ensuite Are you the property owner: Owner of the property Property Type: Detached What are you looking to convert the space into: Bedroom/s Are you looking to have stair...

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02 May

Insulation | Loft / Roof

Knebworth - SG3

Enquiry from: J

Start Date: Immediate

Attic insulation

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22 Jul

Building work | General

Knebworth - SG3

Enquiry from: J

Start Date: Immediate

Home owner Customers description : I have a problem with my soakaway. I am looking for my shared down pipe to be capped and for a new soakaway to be constructed in my back garden. The guttering to th...

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14 Jan

Insulation | Cavity Wall

Knebworth - SG3

Enquiry from: Colin P

Start Date: Immediate

Homeowner Supplied and fitted Please contact to appoint

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28 Jul

Building work | General

Potters Bar - EN6

Enquiry from: Vishal R

Start Date: Immediate

External wall insulation Lead External wall insulation Lead External wall insulation Lead External wall insulation Lead

Repair cracks in walls of from porch caused by extreme heat.

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18 May

Driveway Repair

Barnet - EN5

Enquiry from: Kaveh K

Start Date: Immediate

drive way repair: surface 1m x 1.5 meter - already concreted underneath we need you to get a mix as close as possible to the original and lay it down for us , of course we know it wont be the perfect...

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08 May

Driveway Repair

Barnet - EN5

Enquiry from: Kaveh K

Start Date: Immediate

drive way repair: surface 1m x 1.5 meter - already concreted underneath we need you to get a mix as close as possible to the original and lay it down for us , of course we know it wont be the perfect...

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24 Nov

Building work | Bricklaying

Barnet - EN5

Enquiry from: Padma K

Start Date: Immediate

Air bricks need putting in on outside wall

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05 Nov

Conversion | Loft

St. Albans - AL2

Enquiry from: Iqbal A

Start Date: Immediate

Customer made an enquiry for Loft Conversion via one of our websites. Looking at various options they would like to discuss directly Confirmed interest Please call to discuss and arrange appointment t...

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26 Oct

Conversion | Loft

St. Albans - AL1

Enquiry from: Hazem A

Start Date: Immediate

Customer is looking for quotes for Loft Conversion from pros around St. Albans. Please call to arrange appointment to discuss

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29 Sep

Conversion | Garage

Barnet - EN4

Enquiry from: ANDREW S

Start Date: Immediate

i would appreciate a home visit on 16 or 17 october 2025 4pm if possible so i can discuss my requirements further and then obtain a detailed quotation. i am seeking a cost-effective solution; i curren...

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28 Sep

Conversion | Loft

St. Albans - AL2

Enquiry from: Lucy G

Start Date: Immediate

Customer is looking for quotes for Loft Conversion from pros around St. Albans. Please call to arrange appointment to discuss

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26 Sep

House Extensions

Hatfield - AL9

Enquiry from: Tony R

Start Date: Immediate

Customer in Hatfield area made an enquiry for House Extension online. Please call to arrange an appointment to discuss options

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18 Aug

Conversion | Loft

St. Albans - AL1

Enquiry from: Shahzaib A

Start Date: Immediate

we live in an 2 bed mid-terrace house and are considering a velux conversion for our loft. the floor area is 7.1 x 3.3m and we are planning on using the room as a spare bedroom/study. we have neighbou...

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29 Jun

Building work | Sound Proofing

Barnet - EN4

Enquiry from: Monika A

Start Date: Immediate

Sound insulation in one medium sized bedroom wall

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12 Jun

Driveway Repair

Waltham Cross - EN8

Enquiry from: Andy F

Start Date: Immediate

cement around concrete slabs need renewing

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How much do Builder services cost?

How much do Builders cost? Prices for Builders in 2026 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 Knebworth is:

£25,188

Builder job Builder cost in 2026
Garage conversion in Knebworth £9,834-£19,634
Loft conversion in Knebworth £21,875-£41,875
House extensions in Knebworth £29,250-£62,000
Loft insulation in Knebworth £450-£690
Upvc or wood porch in Knebworth £2,625-£4,025
Barn conversions in Knebworth £112,500-£172,500
Basement renovation in Knebworth £30,000-£46,000
Bedroom fitting in Knebworth £1,500-£2,300
Bricklayers in Knebworth £300-£460
Cavity wall insulation in Knebworth £400-£820
Commercial new builds in Knebworth £105,000-£161,000
Conservatory base in Knebworth £675-£1,035
Building maintenance in Knebworth £2,250-£3,450
Building insurance works in Knebworth £2,250-£3,450
Pebble dashed walls in Knebworth £2,000-£9,200
Plasterboard dry lining in Knebworth £638-£978
Residential new builds in Knebworth £105,000-£161,000
Restoration and refurbishment in Knebworth £37,500-£57,500
Roof insulation in Knebworth £7,500-£11,500
Underpinning in Knebworth £2,250-£3,450
Wall cladding in Knebworth £1,125-£1,725
Wall rendering in Knebworth £3,750-£5,750
Demolition in Knebworth £2,440-£3,660
Roof room in Knebworth £15,000-£23,000
Shop refurbishment in Knebworth £3,750-£5,750
Single storey house extension in Knebworth £24,400-£44,934
Soundproofing in Knebworth £900-£1,380
Driveway repair in Knebworth £607-£51,140
Garden room in Knebworth £6,400-£9,600
External wall insulation in Knebworth £6,000-£15,000

Related Builder searches in Knebworth

Builder FAQs

how much is a single garage conversion?

Converting your garage into a habitable room can be an option that’s too good to pass up especially when you’re in dire need of more living space in your home. If you’re in a similar situation and considering the cost of a single garage conversion in your home, then you’ve come to the right place! The fact is, the cost of a single garage conversion is dependent on a number of influencing factors which includes your specific plans as well as your location. Generally, the price of garage remodel is expected to cost about half of what you’ll incur when building a home extension or addition from scratch. However, before commencing a project of this magnitude you should put into consideration some things.

A single garage conversion is a huge job which typically involves wall insulation, floor raising, heating addition, cool and ventilation as well as updating doors and windows. Before you get started you should consider if converting your single garage into a room is a good option, whether a permit is required to convert a garage, the type of room a garage can become, does it add value to your home and how much its going to cost.

Just like any other home improvement project, garage conversion cost varies depending on several factors like your garage space specifications. Other factors include the general condition of your garage - the condition of your foundation, walls, floors or roofs, the ceiling and more, planning applications, your location, the services of a structural engineer, internal or external garages etc. According to Santander, the average cost of converting a single garage costs approximately £6,300. However, considering the aforementioned influencing factors we’d expect the cost of a single garage conversion to cost within the range of £5,500 to £10,500.

how much does it cost to have loft boarded?

How Much Does It Cost To Have A Loft Boarded?

More often than not, several homeowners fail to realize there’s so much value sitting right under their roof - the loft. When a loft is boarded, there are so many juicy benefits that can be derived. It can be used as a storage room, spare bathroom, home office and several more functions. Therefore, if you really wish to maximize the space under your home’s roof, you’d have to considering boarding it. So how much would it cost to have your loft boarded? Here, you’ll discover the cost of boarding your lofts so you that you can set a budget and start to plan.

The cost of boarding a loft is actually affordable for several individuals, simply because you’re allowed to floor as much or as little as you require. And while you’re up there flooring and fitting the loft boards, you can as well decide to upgrade the insulation of the loft too. This way, you be able to prevent heat from escaping through the roof of the house which helps improve energy efficiency and ultimately, save you some money on heating bills.

If you’d prefer to make it a DIY project, the cost of 18mm chipboard is about £8 to £10 per sheet sized 2400m x 600m. Meanwhile the insulation boards should range between £18 to £22 for a sheet.

For a professional service, you’ll be provided with a quote for both the materials and labour. The amount will be based on the number of boarding required as well as the method selected. For an average storage space needs, flooring size of about 15m2 is suitable. The price for this quantity would be between the range of £50 to £700 for the counter barren method or above £1000 for a more sophisticated method.

Why has my driveway sunk?

Driveways usually sink because they haven’t been laid properly. They may not have been dug deep enough, or the installer might not have used the right materials. This will need to be corrected at the earliest opportunity, although in extreme cases, the driveway may need to be completly be relaid.

How much sand do I need for bricklaying?

Sand is a very important element in bricklaying as far as a mortar mix is concerned. Generally, the quality of the sand is the major factor determining the quality of a plaster mix or mortar mix. It’s recommended that the sand should have enough ‘fines’ (- 75 micron material) to get a good plastic mix with a water content that’s less than 350 litres/m3. Generally, a mortar mix or plaster mix is made within the range of one bag of cement to 200 to 300 litres of damp sand.

Apart from experience the next best indicator of the quality of sand is a field test. In other words, if you do not have the required training or experience in bricklaying, the best bet to determine the amount of sand for a good quality mix is by carrying out a field test. Let’s have a look!

• Get about 50kg of sand and air dry it.

• Scoop 25kg of the sand, 5 kg of cement as well as litres of water ( with 1 litre and 1.5 litres of the water in different containers).

• Mix the cement and sand to form a smooth, uniform and consistent colour.

• One after the other, mix the the sand - cement mixture in the three quantities of water. Do this until you’re able to achieve a mix that’s workable enough to use as plaster.

With that done, you should take note that if 5 litres of water is sufficient then the quality and quantity of the sand is perfect. If you’d require 6 litres of water to get a mix workable as a plaster, then both the quality and quantity of the sand is average. However, if you’d need 7 litres of water to get a mix workable as a plaster, then the quality of the sand is poor. Any requirement of water above 7 litres implies a very poor quality of sand.

how much is a double house extension?

A double house extension is basically a construction to any aspect of your house that elevates up to offer two floors of space. It can be structured to suit your existing home in two storeys or as a side wing on a taller property. If you’re considering building a double house extension, then estimating the cost is a very important task to do before commencing the project. In this article, we’ll give you an idea of the cost of a double house extension so you can estimate yours accordingly.

The double house extension cost depends on several factors that’s specific to your home as well as your design choice. These includes:

• Location of your property. Places like London and the southeast will generally cost more than the other regions due to higher demands.

• Accessibility of the site. The ease of your site’s accessibility also plays a key role in the price.

• Size of the extension. The more the extension’s size in footprint and square metres, the higher the possible costs.

• Materials used in making the roof as well as the complexity of the roof design.

• Your choice of finishing. These includes flooring window and door frames, glazing, underfloor heating and roof lights.

• Your property’s soil type. Different types of soil requires varying treatments as well as materials to develop solid foundations.

Constructing a double house extension is a quite simple build in terms of technicality when its to the side or rear of your house as this can also help you save some money. Generally, considerably expanding your home’s space by building a double house extension will cost within the range of £1,500 per m2 to about £2,800 per m2.

how much are fitted wardrobes?

We all need a reliable place to keep our clothes or dresses, however in situations where a standard freestanding wardrobe just won’t cut it, there is the need to put into consideration a fitted wardrobe. For instance, if you have a bedroom with acloves and sloping ceilings, you’ll discover that the standard-size, freestanding wardrobe just won’t be suitable as they’ll appear strange and look very much out of place while also not being able to put the available space to efficient use. In this regard, a fitted wardrobe will do a much better job as it’s a lot more suitable for mostly all types of bedrooms. So if you’re thinking about having one fitted in your bedroom, you’d probably want to know the just how much it’ll cost. In this article, we’re going to provide you with a good insight on fitted wardrobes cost.

Generally, the prices of fitted wardrobes depend largely on a number of factors. These variables include both the quality as well as the type of included fittings. The types of fitted wardrobes with their estimated price range are given below:

✓ Bespoke fitted bedroom wardrobe. This type can range between £2500 to about £3000 depending on the design details. The extras include mouldings, columns and panels.

✓ Simple two section closet. This type can range between £2500 to about £3200 depending on the design.

✓ Large bedroom, three section, six doors. This type of fitted wardrobe features both interior and exterior finishes alongside drawers and hanging space. The cost normally ranges between £4400 to £4900.

✓ Contemporary, sliding door fitted wardrobe. This type usually features three sections alongside door mirrors to make the bedroom appear larger. The cost normally ranges between £2800 to £3600.

do i need planning permission for a loft room?

Do I Need Planning Permission For A Loft Room?

The answer to this question is maybe. Generally, loft rooms are covered under “Permitted Development which means you won’t need to apply for a planning permission to build a loft room. This is like an advance planning permission provided by local authorities to allow some particular building works to be done such as loft conversions, rear extensions and more. When you’re covered by a “Permitted Development, you’re given the free range to oversee your home’s development without much interference from the regulations or the council. However, for permitted development to apply, there are some specific criteria that must be met. Therefore, if your loft room does not meet the following requirements given below, then you must complete a planning application before proceeding.

• In a terraced house, the converted loft space must not be more than 40 cubic metres.

• In a detached building or semi detached house, the converted loft space must not be more than 50 cubic metres.

• The existing roof slope at the front of the house must cover the extension made.

• The extension should not increase the height of the roof in any way.

• Verandas, balconies and any other structures of this nature must not be included in the extension’s plan.

• The side facing window openings should be at a minimum of 1.7 metres above the ground. The windows must be obscured as well.

• The roof extension should be set back as far as practically possible. It should be at a minimum of 20cm from the current eaves.

• The roof extension should not overhang the house’s roof or it’s wall.

• The materials to be incorporated must be the same or at least similar to what you already have on the house’s exterior.

What are the benefits of cladding or rendering?

The main reason that people use cladding or rendering on their property is the aesthetic benefit. These materials can really boost the appearance of a home. Cladding and rendering can also increase the thermal performance of a property. Speak to a specialist to find out whether your property will benefit.

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