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Garage conversions in Dublin from €18,000, usually without planning permission and 6 to 8 weeks on site.
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460+ Happy homeowners
Build Me turns the garage you don't park in into a proper room, warm, insulated and built to the same standard as the rest of your Dublin home. Home office, bedroom, ensuite or granny flat, we handle everything from the raised floor and new window to the sign-off you'll need when you sell.
What the garage becomes sets the price far more than its size does, because plumbing, an ensuite or a kitchen add the most cost.
€18,000 to €26,000
The simplest conversion and the most common one we build. The room is insulated, heated and wired for a desk, with a window where the garage door was. There is no plumbing, which keeps the price down and the build short.
€22,000 to €32,000
A habitable room has to meet the same standard as the rest of the main house: a fire-safe escape window, smoke detection, radiators off your existing boiler and a floor that sits level with the hall.
€28,000 to €42,000
Adding a shower room means new drainage under the raised floor and extraction to outside. It is the layout most families choose for an older parent or an adult child moving home.
€42,000 to €65,000
A bedroom, shower room and kitchenette, so the space works on its own. A self-contained unit can raise planning questions that a bedroom does not, so we check it before you commit.
€18,000 to €26,000
Priced like an office: no plumbing, plenty of sockets and a hard-wearing floor. If you want a sink or a toilet beside a gym, it moves into the ensuite price band.
In an industry known for missed calls and vague promises, we pride ourselves on great communication and quick responses.
We're fully insured for your peace of mind, protecting your property throughout every stage of the work.
We invest in top tier tools and equipment to achieve precise finishes, professional craftsmanship and lasting results.
Each phase of your project is led by dedicated specialists who excel in their specific area of expertise.
Pick what the garage becomes and the kind of garage you have.
It becomes
Your garage
Estimated cost, incl. VAT
€22,000 to €32,000
Bedroom or living room in a single attached garage in Dublin, floor raising included.
01
The garage door opening is closed with a new insulated wall on its own footing, with a window sized for the room behind it. Matching the brick, render and window style of the main house is what makes a conversion look original rather than added on.
02
Most garage floors sit below the house's damp proof course, so the slab is raised with a damp-proof membrane and insulation until it meets the hall. We check the footings under the old door, and any new window or door opening gets a lintel sized by an engineer.
03
A garage is built to keep a car dry, not a person warm. The walls are lined with insulated plasterboard, the floor is insulated as it is raised and the roof or ceiling is insulated to Part L of the building regulations, so the new room holds its heat like the rest of the house.
04
Radiators usually run off your existing boiler; if it is small, an upgrade costs €1,200 to €3,500. Underfloor heating is an option for €1,500 to €3,500. New sockets, lighting and ventilation are installed by a registered electrician and certified.
05
A bathroom in a garage needs a route for waste water. Where the garage is lower than the drains, or too far from them, a pumped waste unit lifts the water to the soil stack. The room also needs mechanical extraction to outside, and the new pipework is laid before the floor is raised.
06
The converted room becomes part of the heated floor area of the home, so it counts in your Building Energy Rating the next time one is assessed, for example when you sell or rent. Because the new walls, floor and roof are built to current Part L standards, a well-insulated conversion should not drag your rating down.
About 3 m × 6 m (18 m²), sharing a wall, water, power and heating with the main house. That makes it the simplest and cheapest garage to convert, and at the side or rear it is usually exempt from planning permission.
About 6 m × 6 m (36 m²): enough for a bedroom with an ensuite, or a small granny flat. It costs about 1.6 times a single garage, not double, and uses more of the 45 m² exempted development allowance. A bigger boiler may be needed.
Good for a studio, gym or home office away from family noise. Water, drainage and power have to be run across the garden, which adds €3,000 to €8,000, and using it as living space often needs a planning check.
Converting a garage attached to the side or rear of your house into living space is exempted development under Class 1 of the Planning Regulations.
Usually exemptAn office, bedroom or living room, within the 45 m² total.
Check firstA new front window may need a Section 5 declaration (€80) from the council.
Usually needs permissionConservation areas, protected structures and estates with exempted development rights removed.
The converted floor area counts towards the same 45 m² limit as a rear extension, so an earlier extension uses up part of it.
Example: a 20 m² rear extension plus an 18 m² single garage uses 38 of the 45 m².
They apply even when planning permission does not.
If you have a garage you don't park in, converting it is usually the cheapest way to add a room.
Cost per m² in Dublin
Garage figure based on an 18 m² single garage converted to a bedroom. Extension range from our extension cost calculator.
From the first visit to the handover, an office or bedroom conversion takes about 6 to 8 weeks on site.
We measure the garage, check the floor level against the damp proof course and look at the footings under the door.
Layout, window position and a written quote. We confirm whether the work is exempt or needs a Section 5 declaration.
Floor, door infill, insulation, first-fix electrics and plumbing, plastering and flooring.
Decorating, final checks, a walkthrough with you and the compliance documents for your records.
Most of the garages we convert are single attached garages on south Dublin semi-detached houses, from Terenure to Stillorgan. We're fully insured, and a typical conversion takes 6 to 8 weeks on site.
Whatsapp chatSee how we turn Dublin garages into home offices, bedrooms and granny flats built to the same standard as the rest of the house.
Build Me recently completed a full renovation of our home. The whole process was handled professionally from start to finish. Communication was top-notch, with everything coordinated through a whatsapp group. Really happy with the final result.
Vasilij and team did an outstanding job with our recent house renovations. Their work was exceptional including flooring, tiling, painting plumbing/bathroom installation and other works. The team was always so pleasant, hardworking, diligent and professional.
I couldn't be happier with the fantastic job done by Vasilij, Michael, and Daniel! From start to finish, their professionalism, attention to detail, and craftsmanship were absolutely top-notch.
They expertly plastered and painted the walls with a flawless finish that completely refreshed the space.
Max and VJ did an amazing job in our kitchen. I had a timeline to finish the job within a week and they managed it very well.
I recently had my bathroom renovated by VJ and his team and I couldn't be happier with the results! From the initial consultation to the final touches, the entire team was professional, friendly, and incredibly skilled.
Still have questions about your garage conversion? Call 01 270 9764 and we'll be happy to help.
From about €18,000 for a home office with no plumbing to €42,000 to €65,000 for a self-contained granny flat, including VAT. A single garage converted into a bedroom typically costs €22,000 to €32,000. A double garage costs about 1.6 times as much, and a detached garage adds €3,000 to €8,000 for water, drainage and power. Extras such as a kitchenette (€4,000 to €9,000) or bi-fold doors (€3,000 to €7,000) are priced separately. Try the garage conversion calculator for your own layout, and see our guide to home renovation loans for ways to fund it.
Converting a garage is usually cheaper per square metre, because the foundations, walls and roof are already there: about €1,200 to €1,800 per m² against roughly €2,700 to €3,400 for a single-storey rear extension in Dublin. The trade-off is that you lose the garage's parking and storage.
Usually not, if the garage is attached to the side or rear of the house and the total of all extensions and conversions stays within 45 m². Protected structures, conservation areas and some estates are exceptions, and a front window may need a Section 5 declaration.
The new shower room needs a route for waste water to the soil stack. If the garage floor is lower than the drains or far from them, a pumped waste unit lifts the water. It also needs mechanical extraction to outside, and the pipework goes in before the floor is raised.
About 6 to 8 weeks on site for an office or bedroom, and 8 to 10 weeks when you add a shower room or kitchenette.
In most cases, yes. Garage floors usually sit below the house's damp proof course, so the floor is raised and insulated to meet the building regulations and to sit level with the house.
Not for the conversion itself, because a converted garage is built to current insulation standards from the start. SEAI grants do cover energy upgrades to the rest of the house, such as attic or wall insulation, a heat pump or solar panels. Build Me offers SEAI grant work through our SEAI-registered partner contractor, so those upgrades can be done at the same time, with the grant approved before work starts.
Usually, yes. A fourth bedroom or a proper home office is worth more to most Dublin buyers than a garage full of storage. How much depends on your street and on whether buyers there expect off-street parking, so ask a local estate agent before you start, and keep the compliance documents for when you sell.
