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

Avg. price

Avg. price
£29,500

Avg. price high

Avg. price high
£37,400

£37900

£28425

£18950

£9475

£0

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

Single storey house extension searches in April 2025

Single storey house extension Projects in Knebworth in March 2025

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Requests for quotations in Knebworth in March 2025

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Requests for Single storey house extension quotations in Knebworth in March 2025. 0% change from February 2025.

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Requests for Single storey house extension quotations in Hertfordshire in March 2025. 0% change from February 2025.

Source: Numbers calculated based on the search volumes in major search engines

Single storey house extension searches in cities and towns near Knebworth March 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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FAQs

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.

do i need planning permission for a kitchen extension?

If you’re planning to construct a kitchen extension on your property, one of the first things that comes to mind is whether or not you’ll require a planning permission before you proceed. Generally, kitchen extensions are normally classified as permitted development which allows you to carry out your project without any interruptions from the law or your local authority. In other words, if your extension is meets up with the guidelines of the permitted development rights, you won’t have to apply for a planning permission. However if otherwise, you’ll have to apply for a planning permission to your local council and may require additional reports. And regardless of your position, you’ll always need building regulations approval before you can carry out any kitchen extension project. It may also be required that you’ll have to issue a part wall notice if you’re to build on or close to the boundary with a neighbour.

If you don’t want to go through the hassle and stress involved in applying for a planning permission with your local council, then you must ensure the following:

✓ Your kitchen extension must not be over half of the area of land around your main house.

✓ The kitchen extension must not be side elevation onto a highway or forward of the principal elevation.

✓ The extension must not be taller than the highest part of the roof.

✓ The height of your kitchen extension must not go beyond four metres.

✓ Kitchen extension that’s more than one storey must not go exceed the rear wall of the main house by more than three metres.

✓ Two storey kitchen extensions must not be closer to rear boundary by anything less than seven metres.

✓ The kitchen extension must not include balconies, verandas or any raised platforms.

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 to find a builder for a house extension?

Builders are everywhere, but finding one for your project can be tricky and stressful, with both cost and reliability coming into question. This is even more worrisome when you’re fully aware that your house extension can only be as good as the builder. If you’re also facing the same challenge, then you’ve come to the right place. In this article, we’ll share with you some tips on how to choose a professional and reliable builder who’ll ensure you get immense value for every penny spent. Let’s take a look!

✓ Ask for recommendations. To find a tradesperson, not just a builder, personal recommendations is the best way to go. Building a house extension is a major undertaking which comes with a lot of costs, so if you’re going to do it the least you can do is ensure you do it right. Carry out your research, ask friends and family, neighbours and loved ones if the know of any reliable builder in the local area. If they’ve have one they’ve used, you can request for the cost, quality of the job done, the duration of the project and any other detail you feel you should know.

✓ Search Online. Use our search feature to look at the builders available or submit and enquiry and we will find you one. Our site holds details of numerous builders and building companies which you can go through their ratings to select the best.

✓ Select a reliable builder from trading association. Most reliable builders are usually a member of a recognized trading association or the other. Though this is not obligatory for builders, but it can be used as a dependable medium to find a good builder. We list what trade association the builders are a member of.

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Knebworth Single storey house extension installers are rated 4.6 out of 5 based on 4 reviews of 70 pros.
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