Ground floor House Extension in Lewisham

Compare Single Storey House Extension Prices in Lewisham

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Ground floor House Extension in Lewisham

Are you looking for Single storey house extension in Lewisham? Our network of builders can help with your project. All of our Builder in Lewisham are inspected so you can see local consumer reviews, when business was set up, rankings, satisfaction and price,  enabling you to make the right choice on who to work with. Allow us take the hassle 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 property. A single storey extension can be very cost effective and they are suited to many homes. Smaller sized single storey home extensions can be built without the need to make an application for planning permission because they are covered under permitted development rights. Large single storey extensions will still need planning permission. Single storey home extensions can also typically be situated to either the side or rear of your property. Single storey home extensions are often used to expand kitchen areas or even to put in 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 might be used as a kitchen diner or living area. Adding roof lighting and bifold doors to your home extension will generate a large airy space that creates a seamless transition into the garden. While single storey home extensions may appear less complicated than other sorts of extension, careful planning is still necessary to ensure that the new space is functional and beautiful. Experienced architects and building contractors will be able to give you advice on the most appropriate design for your home extension, taking into account the specifications of the new space as well as the best way to complement the present building. Your single storey home extension could be designed to match your current property and make use of similar materials for its construction or be made to contrast, providing a striking effect by using different materials.

 

Factors that impact Single Storey Extension Prices

There are a few elements to bear in mind when you are setting your budget. The primary variables that affect the cost of a single storey extension are the size as well as the finish. But there are other elements that it deserves remembering while you are making your plans.

Over-priced Groundworks Needed

If it is hard to dig the foundations and lay the ground for your extension, then this can enhance the price of your extensions. This may be the case if the ground is tough to deal with. Particles in the ground can likewise raise the costs.

  • Quality of Fixtures and also Fitting
    After the dimension of the extension, the next greatest element is the caliber of the surface. Choosing premium choices can cause the last cost being greater than double what it would certainly be when selecting the fundamental alternatives.
  • Dimension of Extension
    When you are getting an extension on your home, the single largest element that will certainly impact the price of your extension is the size of it. The bigger the extension is, the extra you will wind up paying. If the location inside the extension is easy, without inner wall surfaces, then this will certainly decrease the cost per m2 slightly. Nevertheless, despite having this in mind. The larger the location of your extension, the more you pay.
  • Sort of Extension
    The kind of extension you pick will certainly go a long way towards dictating how huge your extension will certainly be. Side return extensions produce the tiniest extra room so are typically the most inexpensive choice, while a wraparound cooking area extension will certainly develop the most area and have one of the most over-priced fittings as well as components.
  • Building Regulations
    For the most part, constructing policies do not add a great deal of cost to a building project. Nevertheless, if you are building an extension onto an older residence, there may be some unanticipated costs. This is especially real if the residence has not recently been upgraded. Structure policies will relate to your whole house, not simply the extension. This can cause the need for electrics to be considered or door changed.

 

Kitchen Extensions:

Kitchen extensions greatly come under the realms of ground storey extensions, although all kinds of home extensions could be used to include added area for a kitchen.

As an approximate guide, a single storey extension will certainly cost from ₤ 1,000 - ₤ 2,000/ m2, with a standard construct at the lower end of the scale and also an exceptional build quality at the greater end at a range, with prices of ₤ 2,500/ m2 plus.

 

How to find a builder for your extension:

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Average Single storey house extension cost in Lewisham

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 Lewisham, as reported by local LeadsDoWork members.

Single storey house extension installation cost in Lewisham 2025

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

Single storey house extension searches in May 2025

Single storey house extension Projects in Lewisham in April 2025

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Requests for quotations in Lewisham in April 2025

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Requests for Single storey house extension quotations in Lewisham in April 2025. 0% change from March 2025.

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Requests for Single storey house extension quotations in London County in April 2025. 0% change from March 2025.

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

Single storey house extension searches in cities and towns near Lewisham April 2025

Lewisham

The London Borough of Lewisham is a London borough in south-east London, England and forms a part of Inner London. The borough wascreated in 1965, by the London Government Act 1963, as an amalgamation of the former location of the Metropolitan Borough of Lewisham plus the Metropolitan Borough of Deptford, which had been created in 1900 as divisions of the County of London. Nonetheless, minor boundary adjustments have occurred since its creation. The most significant amendments were made in 1996, when the former part of the Royal Docks in Deptford was transferred from the London Borough of Greenwich.

The principal settlement of the borough is Lewisham. The borough covers an overall area of about 13.57 square miles. It's enclosed by the Royal Borough of Greenwich towards the east, the London Borough of Bromley to the south as well as the London Borough of Southwark towards the west. The River Thames forms a short section of northern boundary together with the Isle of Dogs inside the London Borough of Tower Hamlets. Deptford Creek, Pool River, River Quaggy and River Ravensbourne pass by means of the borough.

According to population estimates produced in the middle of 2014, Lewisham is a borough with approximately 291933 permanent residents. Around 43 per cent of households are owner-occupiers. The Prime Meridian passes through Lewisham. Blackheath, Goldsmiths, University of London and Millwall F.C. are located within the borough.

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29 Nov

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London - SE9

Enquiry from: Lucas S

Start Date: Less than one month

customer made an online enquiry for single storey house extension and confirmed on telephone and email they would like a call with a builder to discuss prices.please call to arrange an appointment to ...

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19 Nov

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extend width by 8 inches time scale: immediate please call to appoint

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12 Apr

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customer in london areas is looking to do a couple of projects at the moment, and would like quotes for single storey house extension.confirmed interest via email at 12/04/2021 14:13.please call to ar...

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28 Mar

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Single storey extension to the back and side of the house. 3m out, 7m width at the back. Flat roof.

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27 Feb

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customer is currently in the process of looking for quotes to add a single storey extension to their property. are you the property owner: owner of the property property type: terrace looking for: sin...

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09 Feb

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single storey kitchen extension time scale: less than one month time scale: 1-3 months please call to appoint

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19 Jan

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Enquiry from: Nhamo N

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looking to have a single story extension and loft conversion are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have planning pe...

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03 Oct

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London - SE9

Enquiry from: Nhamo N

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looking to have a single story extension and loft conversion are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have planning pe...

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30 Sep

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London - SE9

Enquiry from: Nhamo N

Start Date: 1 to 3 months

looking to have a single story extension and loft conversion are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have planning pe...

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26 Sep

House Extensions | Single Storey

London - SE9

Enquiry from: Nhamo N

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looking to have a single story extension and loft conversion are you the property owner: owner of the property property type: semi detached looking for: single storey extension do you have planning pe...

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26 Sep

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London - SE9

Enquiry from: Nhamo N

Start Date: 1 to 3 months

customer is currently in the process of looking for quotes to add a single storey extension to their property. are you the property owner: owner of the property property type: semi detached looking fo...

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27 Jan

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London - SE6

Enquiry from: Gal K

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04 Apr

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London - SE15

Enquiry from: Will B

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23 Mar

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London - SE3

Enquiry from: VIJAY K

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16 Mar

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London - SE13

Enquiry from: Christian P

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04 Feb

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Bromley - BR1

Enquiry from: Lyubomir Y

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19 Nov

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London - SE12

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14 Nov

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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 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 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.

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