Ground floor House Extension in Knebworth

Get Single Storey House Extension Prices in Knebworth

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Ground floor House Extension in Knebworth

Are you looking for Single storey house extension in Knebworth? Our network of builders can assist with your project. All of our Builder in Knebworth are examined so you can see local reviews, when business was established, reviews, approval and price,  enabling you to make the right choice on who to work with. Let us take the inconvenience out of discovering up to 4 experts for your Single storey house extension task.

Single storey extensions are a great way to add space and value to your home. A single storey extension can be extremely cost effective and they are suitable for a wide variety of houses. Smaller single storey home extensions can be built without needing to apply for planning permission because they are covered under permitted development rights. Sizeable single storey extensions will still need planning permission. Single storey home extensions can also frequently be placed to either the side or rear of your house. Single storey home extensions are often used to expand kitchen areas or to add a downstairs study or utility room.

 

They are also often used to create a larger open plan area in the downstairs of the property that may be used as a kitchen diner or living area. Adding roof lamps and bifold doors to your home extension will create a huge airy space that creates a seamless transition in to the garden. While single storey home extensions may appear simpler than other types of extension, careful planning is needed to ensure that the new space is practical and beautiful. Experienced architects and builders can advise you on the most effective design for your home extension, taking into account the needs of the new space as well as the best way to complement the pre-existing building. Your single storey home extension could be designed to accentuate your pre-existing property and employ similar materials for its construction or be made to contrast, offering a striking effect by using different materials.

 

Factors that impact Single Storey Extension Costs

There are a couple of variables to remember when you are establishing your budget. The primary elements that affect the cost of a single storey extension are the size and also the surface. However there are other elements that it deserves bearing in mind while you are making your plans.

Expensive Groundworks Needed

If it is tough to dig the structures as well as lay the footing for your extension, after that this can increase the cost of your extensions. This may be the situation if the ground is difficult to collaborate with. Particles in the ground can also raise the costs.

  • Grade of Fixtures and Fitting
    After the dimension of the extension, the next most significant aspect is the caliber of the surface. Picking high-end alternatives can cause the last price being greater than double what it would be when choosing the basic choices.
  • Dimension of Extension
    When you are obtaining an extension on your house, the single most significant factor that will certainly affect the cost of your extension is the size of it. The larger the extension is, the a lot more you will certainly end up paying. If the area inside the extension is easy, without any inner walls, then this will reduce the cost per m2 a little. Nevertheless, even with this in mind. The larger the area of your extension, the more you pay.
  • Type of Extension
    The type of extension you pick will go a long way towards determining just how big your extension will be. Side return extensions create the tiniest extra area so are typically the most inexpensive option, while a wraparound kitchen area extension will certainly develop the most area as well as have the most very expensive fittings and also components.
  • Building Regulations
    For the most part, building laws don't include a lot of price to a building project. Nonetheless, if you are constructing an extension onto an older house, there may be some unexpected prices. This is particularly true if the home has actually not just recently been upgraded. Building guidelines will relate to your whole home, not simply the extension. This can bring about the demand for electrics to be considered or door replaced.

 

Kitchen Extensions:

Kitchen extensions mainly fall into the areas of single floor extensions, although all type of property extensions could be utilized to integrate extra area for a kitchen.

As an approximate overview, a single storey extension will certainly set you back from ₤ 1,000 - ₤ 2,000/ m2, with a basic construct at the lower end of the scale and also an excellent build high quality at the greater end at a range, with costs of ₤ 2,500/ m2 plus.

 

How to find a builder for your extension:

We will provide approximately four Single storey house extension pros locally, who will certainly use quotes for the work you want done. You'll receive a property visit from experts in Knebworth that'll help you to pick the appropriate Single storey house extension for your residence before performing the installment. Enter your postcode to begin browsing now.

Average Single storey house extension cost in Knebworth

The typical cost of Single storey house extension is £29000. Costs alter based on the materials and the firm selected. The upper price range can be as high as £34800. The material costs are in general around £12000

Average price per Single storey house extension job in 2025

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Avg. price low
£21,600

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Avg. price
£29,500

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£37,400

£37900

£28425

£18950

£9475

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Prices based on actual Single storey house extension costs for Knebworth, as reported by local LeadsDoWork members.

Single storey house extension installation cost in Knebworth 2025

Labour cost £14,000
Material cost £12,000
Waste removal £3,000
Time frame: 8-12 weeks

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Single storey house extension Projects in Knebworth in May 2025

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Requests for Single storey house extension quotations in Knebworth in May 2025. 0% change from April 2025.

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Requests for Single storey house extension quotations in Hertfordshire in May 2025. 0% change from April 2025.

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Single storey house extension searches in cities and towns near Knebworth May 2025

Knebworth

Knebworth is a town as well as civil parish in the north of Hertfordshire, England, immediately southern of Stevenage. The civil parish covers an area between the towns of Datchworth, Woolmer Green, Codicote, Kimpton, Whitwell, St Paul's Walden and also Langley, and also includes the town of Knebworth, the small town of Old Knebworth and also Knebworth House. There is proof of individuals residing in the location as far back as Neolithic times and also it is mentioned in the Domesday Book of 1086 where it is referred to as Chenepeworde (the ranch coming from the Dane, Cnebba) with a population of 150. The original village, currently called Old Knebworth, created around Knebworth House. Advancement of the newer Knebworth village began in the late 19th century centred a mile to the east of Old Knebworth on the new railway station and the Great North Roadway (subsequently the A1, as well as now the B197 because the opening of the A1(M) motorway in 1962). At the turn of the century the engineer Edwin Lutyens developed Homewood, southeast of Old Knebworth, as a dower residence for Edith Bulwer-Lytton. Her daughter, the suffragette Constance Lytton additionally lived there, until prior to her death in 1923. Knebworth has, given that 1974, been famously associated with countless significant outdoors rock and also pop performances at Knebworth House, consisting of Queen's last live performance which took place on 9 August 1986 as well as drew a presence estimated at 125,000, Lynyrd Skynyrd, Oasis playing to a quarter of a million individuals for 2 evenings in 1996 and also more lately Robbie Williams, that for 3 evenings in August 2003 done to the biggest crowds ever set up for a solitary performer. Stats from UK Census 2011: All Residents: 5,247.

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Jassi Builders LTD

2 review(s)
Based: in Hayes, UB4 9YD

Hi Jassi Builders LTD here, I am a specialist in planning, designing and building control services. I make sure that I have completed all my work on perfect time and leave customers in complete satisfaction. We do all types of loft conversions, exten...

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Angela A., HP1
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House Extensions | Single Storey in Hemel Hempstead

Assured me he Would give me a good price which made me feel less confident with this builder he was supposed to phone on...

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FAQs

how much does a single storey house extension cost?

If you’re planning to build a single story house extension, this is one of the first questions that usually comes to mind to help you set a budget and start to make plans. But as simple as it seems, a single accurate answer can not be provided due to the fact that there are several variables that can play a key role in influencing the price of a single story house extension. These variables includes the size, location, design or specification as well as the build route. In this guide, we’ll provide you with a rough estimate that you can work with to put you on the right path.

The main determinant of the cost of a single storey extension is the size of the build, while the next most relevant factor is the quality of the finish you opt for. For a small extension, you can expect to spend a sum within the range of £14,000 to £17,000. Meanwhile for a larger single storey extension, if you opt for a large wrap around the extension with a great amount of glass to be incorporated in both the walls and roof, you can expect to pay a sum within the range of £80,000 to £120,000.

Overall, the average cost of a single story house extension is usually within the range of £34,000 to £37,000. For this price, you should get a standard sized rear or side extension which also includes the cost of a kitchen - it’s the most commonly use for a single story extension especially in the UK.

There are some additional costs you may also need to factor in to your extension budget. These includes surveys, architect fees, planning application fee (if needed), insurance and Party Wall Agreement (if needed).

how much does a kitchen extension cost?

Being the most used room in a house, it’s little surprise kitchen extension are usually one of the most popular requests in the UK. They do not only open up a frequently used space in your home, but also goes a long way to add value to your property. However, to know the value that’ll added you must first determine the cost of building such an extension before moving forward. Generally, a typical kitchen extension will cost within the range of £20,000 to about £50,000 plus VAT, based on the size of your project as well as your location.

In reality, a single accurate cost of a kitchen extension will vary depending on a lot of influencing factors, one of which is the type of the extension. Let’s take a look!

✓ Rear extension. You may want to consider this type, if you do not have sufficient space for a side return. This will extend your kitchen into your garden which implies that you’re going to give up some green space to make this a reality. The average price to have this done in London will be about £30,000 or more including VAT, and about £20,000 plus VAT or more in other areas.

✓ Side return extension. This, normally, isn’t a huge add to your property, but will create a lot of space for your kitchen while also be a lot reasonable in terms of cost. This type will extend your home into an alleyway at the side of your property if any is available there. On average, the cost of the side return extension should be about £50,000 plus VAT in London and a lot less in the other regions.

how much is a ground floor extension?

Generally, extensions can be a very tricky undertaking - where it can be quite difficult to have a clear comprehension of the rules, regulations as well as costs. Therefore before you rush in to kick start your ground floor extension project, it’ll be wise to get a good grip on the cost. In this article, we’re going to give you a rough estimate of the cost of a ground floor extension. Let’s take a look!

Just like several other home improvement projects, the cost of constructing a ground floor extension is based on a number of things which includes the size, materials used, your location, the quality of the tradesmen or company hired and lots more. For instance, if you happen to reside in London, the cost of your ground floor extension is going to be a lot higher than the other regions.

The single cost of a ground floor extension should fall within the range of £1,500 per square metre to about £2,000 per square metre. However, if you happen to live in London or the South East, this price can reach up to £1,900 per square metre to about £2,400 per square metre. These prices are for good quality ground floor extensions only. Basic or low quality extensions would naturally cost less while superior quality extension will cost more.

Now looking at the size of the ground floor extension, if you’re looking for a size of about 5m x 5m, you can expect to pay a price within the range of £32,000 to about £36,000. And as usual, in London or the South East, this price can reach up to £50,000 or even more. And that’s just for constructing the extension. If the other relevant costs like the 10 percent to 15 percent professional fees for the architect, planning application (if needed), building regulations and more, the price goes up.

does a single storey extension add value to your house?

Does A Single Storey Extension Add Value To Your House?

When you’re looking to construct a single storey extension or perhaps you’re just searching for means to increase the value of your property, this question always pops up. The short and simple answer to this question is a resounding yes, a single storey extension can go a long way to increase the value of your property. Just like any other home improvement, when done right, adding a little extra living space is one of the top things you can probably think of that’ll provide a cool increase in your property’s value. However, before you rush in you must also take note of some factors so you can be certain a single storey extension is the right option for you. These factors include the quality of the build, complexity of the build, cost of the build versus the value gain, ceiling price in the area, finance costs as well as the inconveniences and stress.

Generally, the average cost of a single storey extension can range from £34,000 to £37,000. For this price, you should get a standard sized rear or side extension which also includes the cost of a kitchen - it’s the most commonly use for a single story extension especially in the UK. So it’s important to know the value they’ll add to your house before deciding to make such an investment.

The value added to your property will depend largely on the quality and size of your single storey extension. The value is usually calculated by estate agents using the number of bedrooms, bathrooms as well as the floor area. Inside London, it’ll typically be priced at £5,000 to £10,000 per square metre, while outside London should be within the range of £900 to £2,000 per square metre.

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Knebworth Single storey house extension installers are rated 4.3 out of 5 based on 5 reviews of 68 pros.
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