Granny pods in the UK
What they are, and how to get one — a self-contained home in the garden, designed for an older relative to live in independently but close by.
A granny pod is the American name for what the UK more often calls a granny annexe: a separate home in the garden, with cooking, sleeping and washing of its own. The term has crossed the Atlantic, and a growing number of UK companies now use it.
Whatever it is called, the building is the same — and so are the two things that matter most before you start: the planning route, and the standard the building is held to. This guide covers both, what a granny pod costs, and how to find a UK company that builds them.
In short
- What it is: a self-contained home in the garden — kitchen, bathroom and bedroom — for an older relative to live independently but close by. In the UK it is usually called a granny annexe.
- Planning: it can never go up as an ordinary garden building. It needs either full planning permission with Building Regulations, or to qualify as a caravan under the Caravan Act route, usually confirmed by a Lawful Development Certificate.
- Cost: typically £65,000–£140,000 all-in for a studio or one-bedroom pod in 2026, including groundworks and connections; two-bedroom from about £140,000.
- VAT: usually 20% on the planning route. A BS 3632 annexe supplied under the Caravan Act may be zero-rated where it is over 7m long or 2.55m wide — on a £90,000 building, that is £18,000.
What is a granny pod?
A granny pod is a small, self-contained home built in the garden of an existing house, intended for an older parent or relative. It has its own entrance, a kitchen or kitchenette, a bathroom, and a bedroom or sleeping area — everything needed to live independently, a few steps from family rather than in a separate house or a care home.
“Granny pod”, “granny annexe” and “granny flat” are used interchangeably. They describe the same thing: living accommodation in the garden, separate from the main house but connected to it.
A granny pod is not a garden room
The term is used loosely, and it pays to know the difference. Some garden room companies market a garden room — sometimes with a kitchenette and a shower added — as a granny pod, and from the outside the two can look alike. For anyone who will actually live there, they are not the same thing.
A garden room is an outbuilding for uses incidental to the house, like an office, gym or hobby room. A granny pod is habitable accommodation: built to a residential standard, insulated and specified for year-round living, and sited through one of the two routes below. A building that hasn’t been through one of the two planning routes may not be lawful to live in full-time, and one not built for year-round living is usually smaller and less suited to daily living than a purpose-built annexe.
Two questions that separate them
- “Is it built to a residential standard — Building Regulations or BS3632?”A company that builds true annexes will answer clearly, and can say which.
- “Which planning route is it sold under?”If the answers are vague, or planning approval is treated as your problem to solve rather than part of the service, you are most likely looking at a garden room.
Who a granny pod is for
Most granny pods are built for an older parent or in-law — independent accommodation close to the people who matter, without anyone giving up their privacy or their space. But the same building suits a wider range of situations than the name suggests.
An older parent or relative
Most companies can incorporate the details that make it work long-term: level access, wide doorways, a properly specified bathroom.
A young adult
Its own entrance and real independence, whether they are saving for a deposit or coming home after a few years away.
A relative with a disability or mobility need
A project where the detail matters most, and where the right layout is built in from the start.
Guests or letting
Its own entrance, kitchen and bathroom make it a very different thing from a spare bedroom.
Do granny pods need planning permission?
In effect, yes. A granny pod needs planning permission or has to qualify as a caravan: the choice is which route, not whether one applies.
The Permitted Development rights that mean most garden rooms need no planning permission do not extend to a self-contained home someone will live in. A building with its own kitchen, bathroom and sleeping space needs one of two routes, which is where the real decision lies.
Full Planning Permission with Building Regulations
The conventional route for a permanently sited garden annexe.
- How it works
- A planning application to your local authority; if approved, the building is constructed to Building Regulations standard and signed off by building control, the same as any new residential construction. It becomes a permanent building with planning permission.
- Timescale
- Allow 6–12 months from application to occupation.
- VAT
- Usually 20%: HMRC standard-rates an annexe that can’t be used or sold separately from the house.
The Caravan Act BS3632 residential standard
The route many dedicated annexe specialists now supply under.
- How it works
- The building is manufactured to BS 3632, the British Standard for residential park homes, and sited under the Caravan Sites Act 1968. It looks and functions like a permanent building, but is classified as a residential mobile home. This route can be faster.
- VAT
- May qualify for zero-rated VAT where it is over 7m long or 2.55m wide and built to BS 3632.
- Paperwork
- A Lawful Development Certificate is optional, but strongly advisable.
The difference between zero-rated and 20% VAT on the building itself.
The VAT position
BS3632-certified annexes supplied under the Caravan Act may qualify for VAT zero-rating under HMRC’s VAT Notice 701/20. HMRC’s test is a caravan manufactured to BS3632 and over 7m long or 2.55m wide. On a £90,000 annexe, the difference between zero-rated and 20% VAT is £18,000. The zero rate covers the building itself; removable contents, groundworks and connections are treated separately, so ask for an itemised quote showing the VAT on each part, and confirm the VAT position in writing before you commit.
Important — the Lawful Development Certificate
On the Caravan Act route there is no planning application. It’s strongly advisable to apply for a Lawful Development Certificate instead: written confirmation from your local planning authority that the siting of your annexe is lawful. It is not planning permission, but it is the document that establishes your position, and it helps when you sell the house.
Most companies handle the planning route as part of their service. What you need is one that is honest about which route suits your site, and why.
Read more: Granny annexe planning and the Caravan Act →
How much does a granny pod cost?
Prices are quoted inconsistently across the market — some include VAT, some do not; some include foundations or a short run of services, others do not. As a guide, based on real projects:
| Layout | Building | Estimated all-in |
|---|---|---|
| Studio / open-planunder 25 sqm | £50,000–£75,000 | from ~£65,000–£95,000 |
| One-bedroom31–55 sqm | £70,000–£120,000 | £85,000–£140,000 |
| Two-bedroom55–90 sqm | £125,000–£160,000+ | £140,000–£180,000+ |
Building prices are as quoted by the companies for the building itself, before groundworks and connections. Figures are from projects featured on The Guide and 267 published prices from 13 UK annexe specialists, checked October 2026.
Groundworks and connections
Some companies include foundations in the price, and a few include a short run of services, usually 10m to 20m. Connecting to the water, drainage and electrics at the house beyond that is normally extra. Where neither is included, groundworks and connections typically add £15,000–£20,000. Before comparing any two quotes, confirm what each covers — and whether VAT is included.
Read more: How much does a granny annexe cost? →
How granny pods are built
A granny pod is held to a higher specification than a garden room, because it is living accommodation. Either of the two common construction systems can produce an excellent result; what matters more is the specification it is built to and the company's experience delivering to a residential standard.
Timber frame
Studwork built up and insulated, a method used for around one in five new low-rise UK homes, and most in Scotland. Well understood by building control, straightforward to adapt for complex layouts, and works for both planning routes.
SIPs (Structural Insulated Panels)
Factory-made insulated panels, now widely used in modern house building. Strong thermal performance and fast assembly, with insulation continuous across the panel face. Ask for panel thickness and U-values.
Read more: How garden annexes are built →
How to find a company that builds granny pods in the UK
Annexe specialists travel to you. Most operate installation teams that cover a wide area, so even if a company's head office is not local, their teams will regularly work in your area — which means your choice is not limited to whoever happens to be based nearest.
Find granny pod specialists that cover your area
The Garden Room & Annexe Directory lists UK companies that build granny pods and annexes, and lets you filter by location, size, bedrooms and planning route.
Official guidance
This page explains the rules in plain English. The official wording is in these sources, and where a council takes a different view of a particular case, the council decides, subject to appeal. An experienced annexe designer will walk you through the routes at the design stage, and planning consultants can advise where a site is less straightforward. But as the householder, it’s your responsibility to confirm your own position.
- Permitted development rights for householders: Technical Guidance
- Why a bedroom, a kitchen or a bathroom isn’t covered by the Permitted Development rules for garden buildings (Class E).
- Caravan Sites Act 1968, section 13
- Twin-unit caravans: no more than two sections, movable by road once assembled, and the 20m × 6.8m × 3.05m limits.
- Lawful development certificates (GOV.UK guidance)
- What a certificate confirms, how to apply and how long the council has to decide.
- HMRC VAT Notice 701/20: caravans and houseboats
- When a caravan annexe can be zero-rated: the size test and BS 3632.
Frequently asked questions
- Is a granny pod the same as a granny annexe?
- Yes. “Granny pod” is the American term for what the UK usually calls a granny annexe or granny flat — a self-contained home in the garden for a relative. The building is the same.
- Is a granny pod the same as a garden room?
- No. A garden room is an outbuilding for uses incidental to the house, like an office or gym; a granny pod is habitable accommodation, built for year-round living and sited through one of the two planning routes. Some garden room companies market a garden room, sometimes with a kitchenette added, as a granny pod — so it is worth asking whether it is built to a residential standard (Building Regulations or BS3632) and which planning route it is sold under.
- Do you need planning permission for a granny pod in the UK?
- In effect, yes. A self-contained home can’t be built as an ordinary garden building. A building with its own kitchen, bathroom and sleeping space is not covered by the Permitted Development rights that apply to garden rooms. It is consented either through full planning permission with Building Regulations, or through the Caravan Act with a Lawful Development Certificate — so the question is which route, not whether you need one.
- How much does a granny pod cost?
- Building prices start from around £50,000 for a compact studio and rise to £160,000 or more for a two-bedroom. Where they aren’t included, groundworks and mains connections typically add £15,000–£20,000. A realistic all-in budget for a one-bedroom granny pod is £85,000–£140,000.
- Can someone live in a granny pod permanently?
- Yes, provided it has been built and consented as habitable accommodation. Most granny pods are approved as ancillary accommodation — tied to the main house and occupied by someone connected to the household.
- Do granny pods pay council tax?
- Usually a granny pod is assessed for council tax in its own right, separately from the main house. In England and Wales an annexe occupied by a dependent relative may be exempt, and in England a 50% reduction applies where the annexe is a relative’s main home, or is used by someone in the main house as part of their own home. The rules depend on your circumstances and differ in Scotland and Wales, so the position for your build should be confirmed with your local council and the Valuation Office (part of HMRC) in England and Wales, or the Assessor in Scotland. Council tax on an annexe: where to check →
Last updated October 2026 · Part of our garden annexe guide.
