How a Granny Annexe Can Add Value to Your Property

Have you ever thought, “Is there a better way to use my garden space?” With the cost of moving rising each year and house extension prices showing no sign of falling. Many homeowners are choosing a smarter way to expand. One of the best options today is building a granny annexe.

A granny annexe is a self-contained living space in your garden. It offers privacy, comfort, and flexibility. Whether it’s for a family member or a rental opportunity, it also adds serious value to your home.

Let’s explore how a garden annexe can be a powerful investment for your property.

Why Garden Annexe Buildings Are a Smart Choice

With house prices and building costs going up, families across the UK are looking for ways to improve their current homes instead of moving . Garden annexe buildings  are growing in popularity because they’re quicker to build, less disruptive, and often more cost-effective than traditional home extensions.

They are also fully self-contained. Complete with a bedroom, kitchen, bathroom, and living area giving you a totally separate, liveable space on your property.

How a Granny Annexe Can Add Real Value to Your Home

1. You Add Extra Living Space

The more usable space your home has, the more it’s worth. A granny annexe adds a completely new living area, separate from the main house. This means you’re not just increasing size but creating new possibilities.

Some families use it for elderly parents or grown-up children. Others turn it into guest space or even a private retreat. More space means more value.

2. You Attract More Buyers

When it comes time to sell, homes with garden annexes stand out. Buyers love the flexibility:

• A place for family to live

• Space for hobbies or relaxation

• A way to earn rental income

• A private area for working from home

  
  

It opens your home up to a much wider audience, which can help it sell faster and for more.

3. You Could Earn Rental Income

A fully equipped garden annexe can also bring in income. With proper permissions, you could rent it out to a long-term tenant or even use it as a short-stay let.

This turns your property into an income-generating asset, which can increase both its value and its appeal.

Granny Annexe Prices vs House Extension Prices

Let’s compare real costs, using actual prices from OffPOD’s price guide:

Size (approx)	Granny Annexe Price	House Extension Price
22 sqm (4m x 5.5m)	£59,995	Not available (closest: 24 sqm @ £61,890)
28 sqm (4m x 7m)	£68,350	£61,890 (24 sqm)
36 sqm (4m x 9m)	£81,000	£75,450 (32 sqm)
60 sqm (5m x 12m)	£107,350	£135,060 (72 sqm)

As you can see, garden annexe buildings often offer more for your money. You’re not just getting walls and windows. You are getting a full, finished home unit. OffPOD’s prices include:

• Kitchen and bathroom fitout

• Electricals and plumbing

• Steel frame construction

• Plastered and painted finish

• Insulation and heating

• Lawful development certification

• Full installation and delivery

  
  

That means no hidden costs and no stress. Everything is included in the price you see.

What Makes a Granny Annexe Add Even More Value?

Not all garden buildings increase your home’s value. To truly boost resale value, your annexe must be:

Self-Contained

Including a bathroom, kitchen, and sleeping area makes it far more useful and valuable.

Built with Quality

Durable materials like steel frames, rockwool insulation and composite cladding protect your investment long-term.

Comfortable All Year

Proper insulation, double glazing, and heating make it liveable 365 days a year.

Stylish and Well-Designed

The annexe should match your home’s look and feel. A professional design increases its appeal to buyers.

Our bespoke design process ensures every annexe is fully tailored to your space, needs, and budget.

What to Know Before Building a Garden Annexe

There are a few things to check before starting your project:

• Planning Permission: Many annexes fall under permitted development, but it’s still important to check with your local authority.

  
  

• Council Tax: If the annexe is used as a separate home (for rent or full-time living), it may need its own council tax band.

  
  

• Usage Rules: If it's for a family member, different rules may apply compared to renting it out.

  
  

Our team at OffPOD help guide you through every step, including planning support and lawful development certification.

Why Choose a Granny Annexe Instead of a House Extension?

Feature	House Extension	Granny Annexe
Liveable space	Adds rooms	Creates a second home
Planning permission	Often required	May not be needed
Rental income potential	Limited	High
Disruption to home	High	Low
Cost efficiency	Often more expensive	More value per £
Resale appeal	Moderate	High

For many people, a granny annexe offers better flexibility, faster results, and more value, without the mess and stress of a major house renovation.

Thinking About Adding a Garden Annexe?

Adding a granny annexe to your home isn’t just about creating space. It’s about creating options for your family, your future, and your finances.

With clear, all-in pricing and a high-quality, turn-key service, OffPOD makes it simple to turn your garden into a valuable new living space. All builds include a 10-year structural warranty, expert installation, and full support from start to finish.

Get in touch today and let OffPOD help you build more than just an annexe. Let’s build long-term value.

Faqs

Can I rent out my garden annexe?

Yes, you can. But you might need special permission, depending on your local area and how the annexe is used.

How long does it take to build?

Most garden annexes are built and ready in a few weeks. Bigger ones may take a bit longer, depending on your garden.

Are there any hidden costs?

No. With OffPOD, the price includes everything. Design, building, fitting, and installation. You won’t get any surprise charges.

What’s included in the annexe?

Each annexe includes a kitchen, bathroom, heating, flooring, paint, and more. It’s fully finished and ready to use.

Will I pay extra council tax?

Maybe. If someone lives in it full-time, it might need separate council tax. Some discounts may apply for family use.