Single Storey Extension Cost Calculator
Here’s a table providing estimations for single-storey extension costs in the UK:
| Size of Extension (m2) | Estimated Cost Range (£) |
|---|---|
| Up to 20 | £24,000 – £50,000 |
| 20 – 30 | £50,000 – £75,000 |
| 30 – 40 | £75,000 – £100,000 |
| 40 – 50 | £100,000 – £125,000 |
| 50 – 60 | £125,000 – £150,000 |
| 60 – 70 | £150,000 – £175,000 |
| 70 – 80 | £175,000 – £200,000 |
| 80 – 90 | £200,000 – £225,000 |
| 90 – 100 | £225,000 – £250,000 |
Please note that these cost ranges are estimations and can vary based on factors such as location, materials used, level of finish, and complexity of the build. Additionally, costs may exclude fees for planning permission, design, and professional services.
FAQs
How much does a single storey extension cost UK? The cost of a single-storey extension in the UK can vary widely depending on factors such as location, size, materials used, and level of finish. On average, you can expect to pay anywhere from £1,200 to £2,500 per square meter for a basic single-storey extension.
How do you calculate m2 extension? To calculate the square meters (m2) of an extension, you multiply the length of the extension by the width. For example, if the extension is 6 meters long and 4 meters wide, the total square meters would be 6 * 4 = 24 m2.
How much does it cost for a 3m extension? The cost of a 3-meter extension can vary depending on various factors such as materials used, location, and complexity of the build. However, as a rough estimate, a 3-meter single-storey extension might cost between £15,000 to £30,000.
What is the price per square metre to build an extension? The price per square meter to build an extension can vary depending on factors such as location, materials used, and level of finish. On average, you might expect to pay between £1,200 to £2,500 per square meter for a basic extension in the UK.
What is the most expensive part of an extension? The most expensive part of an extension is often the structural work, including foundations, walls, and roofing. Other costly elements may include fitting utilities such as plumbing, heating, and electrical systems, as well as any bespoke features or finishes.
What is the cheapest way to build an extension? The cheapest way to build an extension is typically by using simple and economical building materials, avoiding complex structural alterations, and minimizing the need for expensive fixtures and fittings. Additionally, DIY projects or hiring local tradespeople directly can help reduce labor costs.
How much does a 50m2 extension cost? For a 50m2 single-storey extension in the UK, you might expect to pay between £60,000 to £125,000, depending on factors such as location, materials used, and level of finish.
How much does a 40 square meter extension cost? A 40 square meter extension in the UK might cost between £48,000 to £100,000, depending on various factors such as materials, labor costs, and site conditions.
What is the 3 metre rule for extensions? The 3-meter rule for extensions refers to a planning permission guideline in the UK that allows homeowners to build certain types of single-storey rear extensions without planning permission, provided they do not extend beyond 3 meters from the rear wall of the original house for terraced or semi-detached houses, or 4 meters for detached houses.
How much does a 3 metre single storey extension cost? A 3-meter single-storey extension in the UK might cost between £15,000 to £30,000, depending on factors such as materials, labor costs, and site conditions.
How do you calculate extension cost? To calculate extension costs, you need to consider factors such as the size of the extension, materials used, labor costs, site preparation, and any additional expenses such as planning permission fees or professional fees. You can estimate the total cost by multiplying the size of the extension (in square meters) by the cost per square meter and adding any additional expenses.
How much does a 4m extension cost? A 4-meter extension in the UK might cost between £20,000 to £40,000, depending on various factors such as materials, labor costs, and level of finish.
How much do builders charge for an extension? Builders in the UK typically charge between £1,200 to £2,500 per square meter for a basic extension, depending on factors such as location, materials used, and level of finish.
How much does an extension cost per sqm UK? The cost of an extension per square meter in the UK can vary widely depending on factors such as location, materials used, and level of finish. On average, you might expect to pay between £1,200 to £2,500 per square meter for a basic extension.
How much do builders charge per square metre UK? Builders in the UK may charge between £1,200 to £2,500 per square meter for an extension, depending on various factors such as location, materials used, and level of finish.
How long does a single storey extension take? The duration of a single-storey extension project can vary depending on factors such as the size and complexity of the extension, the availability of materials, and weather conditions. On average, a single-storey extension might take between 3 to 6 months to complete.
What are the cheapest kind of extensions? The cheapest kind of extensions are typically basic single-storey extensions built with simple materials and minimal structural alterations. Additionally, DIY projects or prefabricated extensions may offer cost-effective options for extending a property.
Is 50000 enough for an extension? £50,000 might be enough for a small to medium-sized extension in the UK, depending on factors such as size, materials used, and level of finish. However, for larger or more complex extensions, the cost could exceed £50,000.
Can I build my own single-story extension? It is possible to build your own single-storey extension, but it requires significant DIY skills, knowledge of building regulations, and access to appropriate tools and equipment. Additionally, obtaining planning permission and ensuring compliance with building regulations are essential considerations.
What is the cheapest type of roof for an extension? The cheapest type of roof for an extension is typically a flat roof, which is simpler and quicker to construct compared to pitched roofs. However, it’s essential to consider factors such as drainage and insulation to prevent water pooling and heat loss.
Is 40k enough to renovate a house UK? £40,000 might be enough to renovate a small to medium-sized house in the UK, depending on factors such as the extent of the renovation, materials used, and labor costs. However, for larger or more extensive renovations, the cost could exceed £40,000.
What is a shell-only extension? A shell-only extension refers to an extension where only the basic structure and exterior are completed, leaving the interior unfinished. This allows homeowners to customize the interior according to their preferences and budget at a later stage.
How much should an extension cost UK? The cost of an extension in the UK can vary widely depending on factors such as location, size, materials used, and level of finish. On average, you might expect to pay between £1,200 to £2,500 per square meter for a basic extension, but costs can be higher for more complex designs or higher-end finishes.
How much does a 25m2 extension cost? For a 25m2 extension in the UK, you might expect to pay between £30,000 to £62,500, depending on factors such as materials used, labor costs, and level of finish.
How big is a 20 square meters extension? A 20 square meter extension would typically measure around 4.5 meters by 4.5 meters in size, assuming a square or rectangular shape.
Why are house extensions so expensive? House extensions can be expensive due to various factors such as materials costs, labor costs, site preparation, structural requirements, and additional expenses such as planning permission fees or professional fees. Additionally, factors such as location and demand for construction services can influence costs.
Can neighbors object to an extension? Neighbors can object to an extension if they believe it will adversely affect their property in terms of privacy, light, or aesthetics. However, objections must be based on valid planning grounds, and local planning authorities will consider all objections as part of the planning process.
Can I build a 4-meter extension without planning permission? In some cases, you may be able to build a 4-meter extension without planning permission under permitted development rights, subject to certain conditions and limitations. However, it’s essential to check with your local planning authority to ensure compliance with regulations.
Can you build a 2-story extension without planning permission? Whether you can build a two-story extension without planning permission depends on various factors such as the size, location, and design of the extension, as well as local planning regulations. In some cases, permitted development rights may allow for certain types of two-story extensions without planning permission, but it’s crucial to check with your local planning authority.
Can I do a 3-meter extension without planning permission? You may be able to do a 3-meter extension without planning permission under permitted development rights, subject to certain conditions and limitations. However, it’s essential to check with your local planning authority to ensure compliance with regulations.
How long does it take to build a 3-meter extension? The duration of building a 3-meter extension can vary depending on factors such as the size, complexity, and weather conditions. On average, a 3-meter extension might take between 8 to 12 weeks to complete, but this can vary depending on various factors.
Do you need planning permission for a 3-meter extension? In some cases, you may be able to build a 3-meter extension without planning permission under permitted development rights, subject to certain conditions and limitations. However, it’s essential to check with your local planning authority to ensure compliance with regulations.
How much does a single-story extension cost UK? The cost of a single-storey extension in the UK can vary depending on factors such as size, location, materials used, and level of finish. On average, you can expect to pay between £1,200 to £2,500 per square meter for a basic single-storey extension.
How to calculate the extension? To calculate the cost of an extension, multiply the size of the extension (in square meters) by the cost per square meter. Add any additional expenses such as materials, labor, site preparation, and professional fees to estimate the total cost.
How much does a 3-meter extension cost? A 3-meter extension in the UK might cost between £15,000 to £30,000, depending on factors such as materials, labor costs, and level of finish.
How can I extend my house cheaply? To extend your house cheaply, consider using simple and economical building materials, minimizing structural alterations, and opting for basic finishes. DIY projects or prefabricated extensions may also offer cost-effective options. Additionally, careful planning and budgeting can help keep costs down.
How long does a 4-meter extension take? The duration of building a 4-meter extension can vary depending on factors such as size, complexity, and weather conditions. On average, a 4-meter extension might take between 10 to 16 weeks to complete, but this can vary depending on various factors.
Is a small extension worth it? Whether a small extension is worth it depends on factors such as your budget, needs, and long-term plans for the property. A well-designed and properly executed small extension can add value to your home and improve your living space, making it a worthwhile investment in many cases.
What is the most expensive part of a house extension? The most expensive part of a house extension is typically the structural work, including foundations, walls, and roofing. Other costly elements may include fitting utilities such as plumbing, heating, and electrical systems, as well as any bespoke features or finishes.
How much does it cost to build an extension per sqm? The cost of building an extension per square meter can vary depending on factors such as location, materials used, and level of finish. On average, you might expect to pay between £1,200 to £2,500 per square meter for a basic extension in the UK.
Does extension add value to the house? In many cases, a well-designed and properly executed extension can add value to a house by increasing living space, improving functionality, and enhancing the overall appeal of the property. However, the extent of value added will depend on various factors such as the quality of the extension, market conditions, and location.
How much is a 40 square meter extension? For a 40 square meter extension in the UK, you might expect to pay between £48,000 to £100,000, depending on various factors such as materials used, labor costs, and level of finish.
How much does a 50m2 extension cost? For a 50m2 extension in the UK, you might expect to pay between £60,000 to £125,000, depending on various factors such as materials used, labor costs, and level of finish.