Wooden Garden Room Cost Calculator

Width (m):
Length (m):
Height (m):

Factor	Low Estimate ($)	High Estimate ($)
Size (Square Feet)	100	300
Base Material	$5,000	$15,000
Roof Material	$1,000	$3,000
Windows/Doors	$1,000	$5,000
Insulation	$500	$2,000
Flooring	$500	$2,000
Interior Finishing	$1,000	$5,000
Electrical Wiring	$500	$2,000
Plumbing (if needed)	$1,000	$5,000
Additional Features	Variable	Variable
Labor (depending on location and complexity)	$5,000 – $20,000	$20,000 – $50,000
Total	$15,500 – $34,000	$58,000 – $139,000

FAQs

How much does it cost to build a garden room UK?

The cost of building a garden room in the UK can vary widely depending on factors such as size, materials, design, and labor costs. On average, you can expect to pay between £10,000 to £50,000 for a basic garden room, but this can go higher for larger or more customized structures.

How much money does a garden room add to the value of a house?

Adding a garden room can potentially increase the value of your house, but the exact amount varies depending on factors such as the quality of the build, the size of the garden room, and local property market conditions. On average, a well-designed and constructed garden room could add around 5% to 15% to the value of your property.

Is a garden room cheaper than an extension?

In general, a garden room tends to be cheaper than a traditional house extension. This is because garden rooms often do not require planning permission, have lower material costs, and can be constructed more quickly compared to extensions. However, the cost difference can vary depending on the specific requirements of the project.

How long does a wooden garden room last?

A well-built wooden garden room can last for many years, typically around 20 to 30 years or more with proper maintenance and care. The lifespan can vary depending on factors such as the quality of the wood, construction techniques, and exposure to weather conditions.

What is the cheapest way to build a garden room UK?

The cheapest way to build a garden room in the UK is to use basic materials, DIY construction methods, and simple designs. Prefabricated or modular garden room kits can also be cost-effective options. Additionally, choosing a smaller size and avoiding complex features can help reduce costs.

Do garden rooms need foundations?

Yes, garden rooms generally require foundations to provide stability and support for the structure. The type of foundation needed can vary depending on factors such as the size of the garden room, soil conditions, and local building regulations. Common foundation options include concrete slabs, concrete pads, or timber frame bases.

Why are garden rooms so expensive?

Garden rooms can be expensive due to factors such as the cost of materials, labor, design complexity, and site preparation. Additionally, high-quality finishes, insulation, and other features can contribute to the overall cost. Additionally, factors such as access to the site and customization options can also affect the price.

Do you need planning permission for a garden room?

In many cases, garden rooms do not require planning permission as they fall under permitted development rights. However, there are certain restrictions and guidelines to adhere to, such as size limits, height restrictions, and location on the property. It’s advisable to check with your local planning authority before proceeding with construction.

Is a garden room a good investment?

A garden room can be a good investment as it can add value to your property, provide additional living space, and enhance your quality of life. However, the return on investment can vary depending on factors such as the quality of the build, local property market conditions, and the intended use of the garden room.

What is the lifespan of a garden room?

The lifespan of a garden room can vary depending on factors such as the quality of materials, construction techniques, and maintenance. On average, a well-built garden room can last for 20 to 30 years or more with proper care.

What is the maximum size of a garden room without planning permission?

The maximum size of a garden room that can be built without planning permission depends on the specific regulations and guidelines set by your local planning authority. In general, garden rooms built under permitted development rights typically have size limits of around 15 to 30 square meters.

How much is a garden room per square meter?

The cost of a garden room per square meter can vary depending on factors such as the design, materials, labor costs, and location. On average, you can expect to pay between £1,000 to £3,000 per square meter for a basic garden room, but this can go higher for more luxurious or customized designs.

Do garden rooms get damp?

Properly constructed and insulated garden rooms should not suffer from damp issues. However, poor ventilation, inadequate insulation, or water ingress from leaks or condensation can lead to damp problems over time. It’s essential to ensure proper construction and maintenance to prevent dampness.

Are garden rooms cold in winter?

Garden rooms can be cold in winter if they are not properly insulated or heated. However, with adequate insulation, double-glazed windows, and a reliable heating source, garden rooms can be kept warm and comfortable throughout the winter months.

Are garden rooms warm in winter?

Yes, garden rooms can be warm in winter with proper insulation, heating, and ventilation. Double-glazed windows, insulation in walls, floors, and roofs, along with efficient heating systems such as radiators, underfloor heating, or wood burners, can help keep garden rooms cozy during cold weather.

What is the cheapest base for a garden room?

The cheapest base for a garden room is typically a concrete slab or compacted gravel base. These options provide a stable and level foundation for the structure while being relatively cost-effective compared to alternatives such as concrete strip foundations or timber frame bases.

Can I build a garden room myself?

Yes, it is possible to build a garden room yourself if you have the necessary skills, tools, and knowledge of construction techniques. However, building a garden room requires careful planning, attention to detail, and compliance with building regulations. It’s essential to consider factors such as structural integrity, insulation, and weatherproofing to ensure a successful build.

How to insulate a garden room cheaply?

There are several cost-effective ways to insulate a garden room, including:

Installing insulation boards or rolls in walls, floors, and ceilings.
Using draft excluders around doors and windows.
Adding heavy curtains or blinds to trap heat.
Sealing gaps and cracks with caulk or weatherstripping.
Using reflective foil insulation or bubble wrap.
Maximizing natural sunlight and ventilation to reduce heating needs.

Can a garden room have a bed in it?

Yes, a garden room can have a bed in it, provided that it meets building regulations and health and safety requirements. However, it’s essential to ensure proper ventilation, insulation, and heating to create a comfortable and habitable sleeping space.

Can I build a garden room to sleep in?

Yes, you can build a garden room to sleep in, but you must comply with building regulations and ensure that the structure meets health and safety standards for habitation. Factors to consider include insulation, ventilation, heating, fire safety, and electrical wiring.

Can you build a garden room on slabs?

Yes, you can build a garden room on a concrete slab base or paving slabs, provided that the slabs are level, stable, and adequately sized to support the weight of the structure. It’s essential to ensure proper drainage and moisture protection to prevent water damage and dampness.

How much is the average garden room?

The average cost of a garden room can vary widely depending on factors such as size, materials, design, and labor costs. On average, you can expect to pay between £10,000 to £30,000 for a basic garden room, but this can go higher for larger or more customized structures.

Do garden rooms need a concrete base?

Garden rooms do not necessarily need a concrete base, but they do require a stable and level foundation to support the structure. Concrete slabs, compacted gravel, or timber frame bases are common alternatives to traditional concrete foundations and can provide sufficient support for garden rooms.

Do garden rooms add value UK?

Yes, garden rooms can add value to a property in the UK by providing additional living space, enhancing outdoor living areas, and increasing the overall appeal and functionality of the property. A well-designed and constructed garden room can attract potential buyers and potentially increase the resale value of the property.

Can my son live in a log cabin in my garden?

Whether or not your son can live in a log cabin in your garden depends on various factors, including local planning regulations, building codes, and health and safety standards. In some cases, temporary or ancillary accommodation in a garden may be allowed, but it’s essential to check with your local planning authority and ensure compliance with relevant regulations.

Can Neighbours object to a garden room?

Yes, neighbors can object to the construction of a garden room if they believe it will negatively affect their property, such as blocking sunlight, obstructing views, or causing noise or disturbance. However, objections must be based on valid planning grounds, and ultimately, decisions are made by the local planning authority.

Can I build a garden room next to my Neighbours fence?

You can typically build a garden room next to your neighbor’s fence, provided that you comply with relevant planning regulations, such as height restrictions, setback requirements, and boundary rules. It’s essential to maintain good relations with your neighbors and consider their concerns when planning construction near shared boundaries.

How long does it take to build a garden room?

The time it takes to build a garden room can vary depending on factors such as size, complexity, design, and weather conditions. On average, a simple garden room can be constructed in a few weeks to a couple of months, while larger or more complex projects may take several months to complete.

Can I live in my garden room?

Whether or not you can live in your garden room depends on various factors, including local planning regulations, building codes, and health and safety standards. In some cases, garden rooms may be permitted for use as temporary or ancillary accommodation, but it’s essential to check with your local planning authority and ensure compliance with relevant regulations.

Do garden rooms get hot?

Garden rooms can become hot in warm weather, especially if they are not adequately insulated or ventilated. However, proper insulation, shading, and ventilation can help regulate temperature and keep garden rooms comfortable during hot weather. Features such as windows, doors, and roof vents can also help improve airflow and prevent overheating.

Do you need to insulate a garden room?

Insulating a garden room is highly recommended to improve comfort, energy efficiency, and usability throughout the year. Proper insulation helps regulate temperature, reduce heat loss in winter, and prevent heat gain in summer. Insulation materials such as fiberglass, foam boards, or wool can be installed in walls, floors, and ceilings to create a comfortable and thermally efficient space.

Are garden rooms soundproof?

Garden rooms can be made soundproof to a certain extent by using sound-absorbing materials, double-glazed windows, and solid construction techniques. However, achieving complete soundproofing may be challenging, especially in outdoor environments where sound transmission can occur through walls, floors, and ceilings. It’s essential to consider factors such as noise levels, acoustics, and intended use when designing and constructing a garden room.

How long will a wooden summerhouse last?

The lifespan of a wooden summerhouse can vary depending on factors such as the quality of materials, construction techniques, maintenance, and exposure to weather conditions. On average, a well-built and properly maintained wooden summerhouse can last for 10 to 20 years or more.

What is the 2.5 m rule for garden rooms?

The 2.5-meter rule for garden rooms refers to the maximum allowable height of an outbuilding, such as a garden room or shed, built under permitted development rights without requiring planning permission. According to this rule, the highest point of the outbuilding should not exceed 2.5 meters in height if it is located within 2 meters of a boundary of the property.

Do garden rooms add value?

Yes, garden rooms can add value to a property by providing additional living space, enhancing outdoor living areas, and increasing the overall appeal and functionality of the property. A well-designed and constructed garden room can attract potential buyers and potentially increase the resale value of the property.

Can I build a garden room within 1m of a boundary?

In some cases, you may be able to build a garden room within 1 meter of a boundary, but this depends on various factors such as local planning regulations, setback requirements, and the size and design of the garden room. It’s essential to check with your local planning authority and ensure compliance with relevant regulations before proceeding with construction.