If you need more living space but don’t want the cost and disruption of a traditional build, a modular home can be a practical alternative. But are modular homes a good idea?

For many people, yes. A well-built modular home can be comfortable, energy efficient and quicker to deliver than a conventional build. Whether it’s right for you depends on your site, your budget, the planning rules where you live and, above all, the company building it.

What Is a Modular Home?

A modular home is built in sections in a controlled environment, then delivered and installed on your site. Modern modular homes are permanent, fully finished living spaces, nothing like a temporary cabin, with a kitchen, bathroom, bedroom and living area, along with proper insulation, heating and electrics.

CG Garden Rooms builds bespoke modular homes across Northern Ireland, Ireland and the UK, with turnkey packages that cover design, installation and finishing.

What Are the Advantages of a Modular Home?

A faster build with less disruption

Because much of the work happens off site, there’s far less time spent building at your property. Most CG modular homes are installed and ready to use within a few weeks of production. Bear in mind that the full timeline also includes design, any planning steps, site preparation and delivery.

Comfortable and energy efficient

High-performance insulation and modern construction methods help the home hold its heat, keep running costs down and stay comfortable all year. Windows, doors, heating and ventilation all play a part too, so ask about each of them rather than accepting “energy efficient” as a given.

Designed around how you live

A modular home doesn’t have to be a fixed design. Layout, finishes and features can be tailored to you, whether that’s an open-plan kitchen and living area, extra storage, a utility room or a private patio.

A complete living space

CG Garden Rooms’ current 40m² modular home includes a fitted kitchen with a breakfast bar, a living area with a media wall and electric fire, a utility and boot room, a modern bathroom, and a king-size bedroom opening onto a private patio. That makes it a genuine home rather than an extra room, and a practical option for family members, independent living, downsizing or guests, subject to planning and building regulations.

How Much Does a Modular Home Cost?

There’s no single price, because every project is different. CG Garden Rooms prices each modular home based on its size, design features, interior finish and site work. Other costs to factor in include foundations, delivery, installation and utility connections.

“Turnkey” can also mean different things from one company to the next. Before you sign, ask for an itemised quote and check whether it covers:

site preparation and foundations
delivery and installation
electrics, plumbing and heating
kitchen, bathroom and flooring
service connections and external works

Compare the full cost of the finished project, not the headline figure. If you’d like to spread the cost, you can ask the team about finance options.

Do You Need Planning Permission for a Modular Home?

This is where many people make the wrong assumptions. A modular home is not automatically exempt from planning, and the rules are different in the Republic of Ireland and Northern Ireland.

Republic of Ireland: the July 2026 changes

Since 27 July 2026, new exempted development rules allow homeowners in the Republic of Ireland to build a detached auxiliary dwelling of between 32m² and 45m² in their rear garden without planning permission, as long as every condition is met. A modular home can qualify, but this is not a blanket exemption for modular homes. The main conditions are:

Size: at least 32m² and no more than 45m², and that 45m² limit includes any other garden structures already built under the existing Class 3 exemption, such as a shed or garden room.
Location: rear garden only, leaving at least 25m² of private open space for the main house.
Height: no more than 4m with a tiled or slated pitched roof, or 3m for any other roof.
Boundaries: at least 0.6m from any wall or boundary, and windows at least 0.6m from the boundary they face.
Services: it must use the main house’s services, with no separate water, wastewater or other utility connections. On a septic tank or other on-site system, the system must have enough capacity, the building can’t sit on the percolation area, and no extra treatment unit can be added.
Use: it can only be occupied together with the main house. It can’t be sold or subdivided separately, and it can’t be used for short-term letting.
Ownership: the main house must be the owner’s sole or main residence when work starts, and the exemption can’t be used if the main house has been subdivided.
Access: no new entrance onto the road, but the dwelling needs its own pedestrian and wheelchair access within the property.
Permanent build: caravans and mobile homes don’t qualify.
Notice: you must notify your local planning authority at least 14 days before work begins.
Deadline: works must start and finish by 31 December 2030, when the exemption ends.

Building Regulations, including fire safety requirements, still apply in full. If your plans don’t meet every condition, for example the dwelling is larger than 45m², it would be in a side or front garden, or it needs its own connections, you will need planning permission. You can read the full conditions in the official regulations (S.I. No. 340 of 2026), and it’s worth checking your site with your local authority before you order.

Northern Ireland

The Republic of Ireland changes don’t apply in Northern Ireland, which has its own planning system. Using a modular home as self-contained living accommodation in Northern Ireland will generally need planning permission, and Building Control approval also applies. Speak to your local council’s planning office before you commit to a design.

Is a Modular Home Right for You?

A modular home is often a good fit if you:

need extra accommodation for family members or guests
want a modern, energy-efficient living space
would like a quicker build with less disruption at home
prefer one team to handle the project from design to finish

It may be less suitable if your site is hard to reach for delivery and installation, the ground needs significant work, or the new space has to connect directly to your existing house. In that case, a traditional extension may make more sense.

What Should You Check Before You Buy?

Who builds it, and exactly what’s included in the specification.
Site costs, such as groundworks, foundations and connections.
Access for delivery and installation.
Planning: confirm your position before ordering, using the guidance above.
Warranty: what’s covered, and for how long.
Build quality: look past the kitchen and bathroom to the structure, insulation and windows behind them.

The best way to judge build quality is to see one in person. CG Garden Rooms’ 40m² modular home is on display at its showroom, where you can walk through the space and talk through layouts and finishes with the team.

So, Are Modular Homes a Good Idea?

For many homeowners, yes. A well-built modular home combines bespoke design, energy-efficient construction and a quicker, less disruptive build, without compromising on comfort.

The key is to choose a reputable builder, understand the full specification and cost, assess your site, and confirm the planning position before you commit. If you’re exploring modular homes in NI & Ireland, start by deciding what you need from the space, then talk to the team about size, layout and budget.