Modular garden homes and granny pods: what to check before you buy
The short answer
Most garden homes are modular: built in a factory and installed on a prepared base. Before you pay a deposit, ask for NSAI Agrément certification (or evidence of compliance with an Irish Standard), confirm the unit is designed as a home under the Building Regulations, and get in writing what the price includes: base, connections, certifiers and the completion certificate.
On this page
What a modular garden home is
A modular home is built off-site, either as complete modules lifted into place or as factory-made panels assembled on site. It's quicker and often cheaper than building on site, and it can be a Class 3A garden home if it meets every condition.
Checks before you buy
- NSAI Agrément certificate for the building system, or evidence of compliance with an Irish Standard. Check the certificate number and that it covers the product you're buying.
- Designed as a home, meeting Building Regulations for fire safety, energy, ventilation, access and drainage, not just "suitable for year-round use".
- Size: 32 to 45 m², including any sheds or garden rooms you keep.
- Paperwork: whether the supplier provides the design certifier, assigned certifier and builder's documents for the commencement notice and completion certificate. See how to build a garden home.
- Track record: homes they've installed in Ireland that you can see, and how long they've been trading.
- Guarantee: what it covers and for how long, and who stands behind it if the company stops trading.
What the price includes
| Ask about | Why it matters |
|---|---|
| Base and groundworks | Often excluded; can add €5,000 to €10,000 or more |
| Water, waste and power from the house | Required by Class 3A; long runs cost more |
| Kitchen and bathroom fit-out | "Bathroom space" may not mean a finished bathroom |
| Certifiers and Building Control documents | Needed for the commencement notice and completion |
| Delivery, crane and road permits | Can be significant for complete modules |
| VAT | Check every figure |
See garden home costs and the garden home estimator.
Delivery and installation
- Complete modules arrive on a lorry and are lifted in by crane. Fast, but needs space on the road and sometimes a council permit.
- Panel systems come in pieces small enough to carry through a side passage.
- The base and service connections are usually done first, so the home can be connected soon after it's placed.
"Granny pods" and cabins
"Granny pod" is a marketing name, not a legal category. Some pods are homes built to the Building Regulations; others are insulated cabins or garden rooms. A cabin sold for occasional use isn't a home, and living in one isn't covered by Class 3A. See mobile homes, log cabins and pods.
Common questions
Do modular garden homes need NSAI Agrément?
Council guidance on the 2026 regulations says homes built off-site and assembled on site should have NSAI Agrément certification or comply with an Irish Standard. Ask the supplier for the certificate and check it covers the system you're buying.
How much does a modular garden home cost in Ireland?
A 32 to 45 m² modular unit costs roughly €48,000 to €74,000 for the structure, with groundworks, connections and fees on top. See our garden home cost guide for a full breakdown.
Can a modular home be craned into my back garden?
Some are delivered as one or two complete modules and lifted over the house by crane. That needs road access for the lorry and crane, and sometimes a council permit to use the road. Panel systems can be carried through a side passage instead.
Sources
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