Garden Studio vs Home Extension: Which Makes More Sense?

Garden Studio or Home Extension: Which Is Right for You?

Both options give you extra living space, but they work in different ways. A garden studio creates a separate building in your garden, while a home extension adds space to your existing house.

The right choice depends on how you plan to use the space, your budget, how much disruption you're willing to accept and whether you want a separate building or a permanent extension to your home.

At a Glance

What Is a Garden Studio?

A garden studio is a standalone building built in the garden that creates extra space away from the main house.

Many garden studios work well as home offices, gyms, or hobby rooms. When properly insulated, they can stay comfortable year-round.

Because it sits separately from the house, a garden studio is usually simpler to install than building a home extension. It can also be positioned where it works best in the garden, with far less disruption to the house.

If you're still deciding how you might use the space, explore our ideas for using a timber garden studio.

What Is a Home Extension?

A home extension adds new space to the existing house. It can be a kitchen extension, a larger living area, extra bedrooms, or a utility room.

Unlike a garden studio, an extension becomes part of the main building. The new structure connects to the existing house, so it often involves structural work, roof changes, and adjustments to the internal layout. 

Because everything has to link to and fit well with the existing house - foundations, drainage, insulation, and finishes - the project can take longer and cost more.

Is a Garden Room Cheaper Than an Extension?

Cost is one of the main reasons people choose a garden studio over a home extension. It often costs much less, simply because it is easier to build.

Using timber can also help reduce the overall cost. Many timber buildings are made in sections or delivered partly assembled, which makes installation quicker than building with brick. 

Timber is also more environmentally friendly because wood stores carbon and requires less energy to produce than materials like steel or concrete.

That said, the final cost will still depend on the building’s size and specification. 

Find out why timber is a popular choice for garden buildings.

Typical Costs

Although every project is different, a fully insulated garden studio is usually much cheaper than a house extension.

• Garden studio: around £20,000–£50,000, depending on the size and specification - surce: MyBuilder
• Single-storey house extension: typically £1,800–£3,000 per m², meaning a 25m² extension could cost £45,000–£75,000 before optional extras - source: Planning to Build.

Planning Permission: Garden Studio vs House Extension

Planning rules can also affect whether a garden studio or home extension is the better option.

In many cases, a garden studio can be built under Permitted Development, which means you may not need full planning permission if the structure is within certain limits for size and height. The building must still be used as part of the main home and not as a separate place to live.

A home extension can sometimes fall under Permitted Development, but the rules are usually stricter. This means planning permission is more often required, and the project can take longer to begin.

Homes in conservation areas, listed buildings, or houses that have already been extended may need planning permission. Listed buildings also need Listed Building Consent.

For a more detailed explanation, read our guide to planning permission for garden buildings.

Do Garden Rooms Add Value to Your House?

Having extra space can make a home more appealing to buyers. Many people now work from home and appreciate having a separate office.

How much value it adds can vary. It often depends on the design, build quality, and how well the garden room suits the property.

Is It Cheaper to Build a Conservatory or Extension?

Some homeowners consider building a conservatory instead of a home extension. 

Conservatories are often cheaper to build because they use lighter structures and large areas of glazing rather than brick walls.

But they’re not always suitable for year-round use. The large glass panels can make them very hot in summer and cold in winter. 

A well-built garden room, especially an insulated garden studio, can stay comfortable throughout the seasons. Solid walls, proper insulation, and ventilation help keep the temperature more stable.

When a Garden Studio Makes More Sense

A garden studio may be the better option when you want:

• A more cost-effective option
• A room separate from the main house
• Faster installation and less disruption during construction
• Additional space without changing the structure of the house
• A building that may fall under Permitted Development, depending on size and location
• A flexible space that you can change or remove later.

When a Home Extension May Be the Better Choice

A home extension may be the better option when you need:

• A larger kitchen, living room, or dining room
• Additional bedrooms or bathrooms within the main property
• To rearrange the layout of your house
• A permanent structural addition.

Are You Looking for a Bespoke Insulated Garden Studio?

At Olson Timber Buildings, we design and manufacture timber garden studios built for comfortable, year-round use. 

Our buildings feature pressure-treated structural framing, insulated floors, walls, and roofs, and double-glazed windows to help maintain a comfortable indoor environment. Generous roof overhangs and durable finishes help protect the building and improve its durability.

Each bespoke garden studio can be customised to suit your property, with a range of layouts, glazing options, and features such as a decked porch.

Our team of experienced builders often complete a build in about a week - depending on size - with minimal disruption to your property.

Explore our range of garden studios.