Ground floor House Extension in Knebworth

Get Single Storey House Extension Prices in Knebworth

Home > Extensions & Conversions Projects > Single storey house extension > Knebworth

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

Avg. price low

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 January 2025

Single storey house extension Projects in Knebworth in December 2024

81

Requests for quotations in Knebworth in December 2024

0

Requests for Single storey house extension quotations in Knebworth in December 2024. 0% change from November 2024.

0

Requests for Single storey house extension quotations in Hertfordshire in December 2024. 0% change from November 2024.

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

Single storey house extension searches in cities and towns near Knebworth December 2024

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.

Looking for Single storey house extension in Knebworth?

Get free quotes from local builders

Get free quotes

Single storey house extension pros in Knebworth

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...

Latest review

Angela A., HP1
3

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...

Local & reliable builders near me

Tell us about your single storey house extension project

Answer a few quick questions, so we can match you with local builders who can help.

Find up to 4 builders in Knebworth

Get free, no-obligation local single storey house extension quotes from 4 verified builders working in Knebworth.

Hire with confidence

Compare customer reviews, services and prices, and choose the right tradesperson for you.

Our reviews

Average

Would highly recommend

Would highly recommend, they found me a firm which I was happy with a quote they give me and went ahead and had my job done within 2 days of enquiring.

Good easy way to find a selection of…

Good easy way to find a selection of trades you need all in one place.

Love LeadsDoWork it's a big part of my …

Love LeadsDoWork it's a big part of my Business I would recommend to anyone

FAQs

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.

How long does a small extension take?

If you’re planning to build a small extension on your property, you’ll most likely want to know the length of time it’ll take to complete the home extension. Just like many other home improvement projects, it’s impossible to provide a specific number of day in which your project will be completed as the duration is based on a number of influencing factors. This includes the size of the development work as well as whether or not you plan to live in the house when the work is being done. In this article, we’re going to give you a breakdown of the processes that’s involved in building a small single storey extension alongside the duration for each so you can have an idea of how long your small extension project will take. Let’s take a look!

✓ A small single storey extension will normally take about 3 months to be completed.

✓ Site preparation is the first step in the process and it’ll take up to 2 weeks the dig out the footings and prepare foundations. Followed by a further 2 weeks to fit the damp course as well as any drains required around the extension.

✓ The 5th week is spent on working on the external walls and putting in place blockwork to deliver cavity wall insulation.

✓ The next 2 weeks will be spent on installing the roof structure as well as internal walls.

✓ Once done. The builders will make the structure weather proof and electricians or gas fitters will be on site to add power to the extension. This will be followed by internal walls’ plastering as well as breaking into your main house.

✓ After this, when the plaster is dry and decoration completed, units or furniture will then be installed.

how much does a kitchen diner extension cost?

If you’re planning to construct a kitchen diner extension, to help you set a budget and start planning you must first have a cost estimate that’ll complete the entire project. If not, there’s a probability that you may have to spend more than would have been necessary or probably break the bank to have the project done. In truth, there’s no single and short answer to this question as the cost of a kitchen diner is largely dependent of several variables. In this article, we’re going to give a good insight into kitchen diner extension cost so as to help you make informed decisions moving forward. Let’s take a look!

On the average, a kitchen diner extension will cost within the range of £25,000 to about £45,000, however if you happen to reside in London, you can expect the cost to be a lot more than that - closer to £60,000. And due to the fact that there happens to be a plethora of options out there, any decision to make be it on the size, tradesman, flooring, finishes or type of the kitchen diner extension, will have a considerable impact on the overall cost of the project. For instance, a basic kitchen diner extension cost can be within the range of £12,000 to about £15,000., while a high end kitchen diner extension can reach a whooping price between £80,000 to about £100,000.

The total cost of your kitchen diner project will rely heavily of the size as well as the quality of the finishes. For example, a kitchen diner extension that’s small and basic is likely to cost about £1,300 to £1,500 per square metre. However, if you’re going for higher quality finishes, you can expect to pay within the range of £1,900 to about £3,000 per square metre.

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.

Placholder Image

Other Top Projects in Knebworth

Customer Reviews

Overall rating:


Knebworth Single storey house extension installers are rated 4.3 out of 5 based on 5 reviews of 68 pros.
The LeadsDoWork rating and review is an overall rating based on verified reviews and feedback from the customers with Single storey house extension projects that have been connected with Single storey house extension pros to help them. All Single storey house extension contractors All Knebworth Single storey house extension contractors
Renovating a large 4 piece bathroom in Exeter Published: 12/01/2025 Transform your large 4-piece bathroom in Exeter with expert renovation services. Modernize your space with bespoke fittings and high-quality materials. Read this article
Apex roof replacement on concrete garage in Sutton Published: 12/01/2025 Replace the apex roof on a concrete garage in Sutton, ensuring a weatherproof solution with durable materials and updated wooden gable ends. Read this article
Laminate flooring and skirting board fitting in Doncaster bathroom and landing Published: 12/01/2025 Professional fitting of laminate flooring and skirting boards for a bathroom and upstairs landing on Stoops Lane, Doncaster. Expert installation tailored to your home. Read this article

Are you a builder in Knebworth?

We can help you get more single storey house extension work with our qualified job leads and boost your business.

Join today