Attic Conversions Dublin | Loft Extension Specialists | Dublin Builders

Dublin Builders — Attic Conversion Specialists

Attic Conversions Dublin

Turn your unused roof space into a stunning new bedroom, home office, or living area. Expert attic conversions and loft extensions across Dublin City and County.

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Attic Conversions Dublin — Unlock the Space Above You

Attic conversions Dublin homeowners rely on are one of the most cost-effective ways to add a full extra room to your home without extending its footprint. Whether you want a master bedroom suite with en-suite, a quiet home office, a teenage retreat, or a guest room, the roof space above your existing home is very often a ready-made opportunity waiting to be unlocked. At Dublin Builders, we have been completing attic conversions and loft extensions across Dublin for over 30 years.

Unlike a rear extension, an attic conversion or loft extension keeps the build entirely within the existing structure of the house, meaning work can typically proceed with minimal disruption to your daily life. There is no scaffolding to the rear, no loss of garden space, and in many cases no planning permission required. The result is a bright, fully insulated, and properly floored additional room that adds both space and significant value to your home.

We carry out a full structural and headroom assessment before providing any quotation, ensuring you receive an honest and accurate picture of what your roof space can deliver before committing to anything.

Bright attic conversion with large window and beige sofa seating area Dublin

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Conversion Types

Types of Attic Conversion & Loft Extension

Velux / Rooflight Conversion

The most straightforward loft extension, adding Velux-style roof windows into the existing roof slope to bring natural light into the converted space. Ideal where headroom is already sufficient.

Most cost-effective option
Usually exempt from planning
Minimal external change
Fastest build programme

Dormer Conversion

A dormer extends vertically from the roof slope, dramatically increasing headroom and usable floor area within the loft. The most popular attic conversion type across Dublin's semi-detached housing stock.

Maximises usable floor area
Suits most Dublin roof types
En-suite easily accommodated
Planning may be required

Hip-to-Gable Conversion

On detached and some semi-detached Dublin homes, converting the hipped end of the roof to a vertical gable wall unlocks a large amount of additional floor area in the attic space.

Significant space gain
Often combined with dormer
Planning permission required
Best for detached properties

En-Suite Attic Bedroom

The most popular use of converted attic space in Dublin. A private master suite or guest bedroom with en-suite adds a full bedroom to your home and significantly increases its market value.

Full bathroom installation
Eaves storage integrated
Bespoke fitted wardrobe option
Strong property value uplift

Home Office Loft Extension

A dedicated loft extension home office removes the compromise of working from a bedroom or kitchen table. Properly insulated, wired, and lit for year-round use.

Separate, quiet workspace
Cat6 and electrical spec
Acoustic insulation available
Often exempt from planning

Playroom & Living Space

Converting your attic into a family playroom, teenager hangout, or informal living space takes the pressure off your main living areas and gives everyone in the household their own space.

Open plan layout options
Skylights for natural light
Storage integrated into eaves
TV and media wiring included

What's Included

Our Attic Conversion & Loft Extension Service

Structural Works

Structural engineer's specification
Steel beam installation where required
Floor joist strengthening
New staircase design and installation
Structural opening into existing landing

Roof & Insulation

Dormer or hip-to-gable construction
Velux or dormer window installation
Full roof insulation to Part L
Airtightness membrane
Roof finishing and weatherproofing

Internal Fit-Out

Insulated dry-lining to walls and ceiling
Floor screed or boarding
Plasterboard and skim finish
Painting and decoration
Eaves storage units

Mechanical & Electrical

Full electrical first and second fix
Lighting design and installation
Heating extension or electric underfloor
Plumbing for en-suite if required
Cat6 data and TV points

Planning & Exemptions

Attic Conversion Planning Permission in Dublin

Many attic conversions in Dublin qualify as exempted development, meaning no planning permission is required, provided the conversion stays within the existing roof structure without enlarging it. A standard Velux or rooflight loft extension — where no dormer is added and the roof profile remains unchanged — typically qualifies for exemption, as does an attic converted purely to a home office or playroom use.

Dormer conversions and hip-to-gable loft extensions typically require planning permission, as they involve a visible change to the external appearance of the roof. Front-facing dormers almost always require a formal application, while rear dormers may sometimes fall under exempted development rules depending on size, property type, and location. Our team carries out a full planning assessment before any quotation so you have absolute clarity on what applies to your home.

New planning exemptions for attic conversions: The Irish Government has proposed new exemptions specifically covering attic conversions and dormer additions as part of a broader review of exempted development thresholds. These regulations were at an advanced draft stage as of July 2026 but are not yet signed into law. Our team can advise on what currently applies and what may change in the near term.

All attic conversion and loft extension works carried out by Dublin Builders are compliant with BCAR (Building Control Amendment Regulations), and a Certificate of Compliance is provided on completion. This is essential for re-sale and for satisfying mortgage lender requirements when the property changes hands.

Attic Conversion Costs in Dublin

A standard Velux attic conversion in Dublin typically costs between €25,000 and €40,000, depending on the size of the space and level of finish. A dormer conversion with en-suite generally ranges from €50,000 to €80,000, while larger hip-to-gable loft extensions with full dormer can reach €90,000 to €120,000. These figures include all structural works, insulation, first and second fix, and internal fit-out to a standard finish. All projects are tendered on a fixed-price basis with no hidden costs.

How Long Does an Attic Conversion Take in Dublin?

A Velux attic conversion typically takes 6 to 8 weeks on site. A dormer conversion or loft extension with en-suite generally runs to 10 to 14 weeks from start to handover. Hip-to-gable conversions may take 12 to 16 weeks depending on complexity. If planning permission is required, allow an additional 8 to 12 weeks before construction begins. Most of the work is carried out above the existing ceiling line, meaning the disruption to your home during the build is considerably less than a ground floor extension.

Attic Conversions Dublin — Frequently Asked Questions

The main factor is headroom. You need a minimum of around 2.2 metres from floor joist to ridge to achieve a comfortable loft extension. Most standard Dublin semi-detached homes built from the 1940s onwards have sufficient ridge height, though this varies. We carry out a full headroom and structural assessment before quoting so you are not paying for plans on a space that cannot be converted.

It depends on the type of conversion. A standard Velux or rooflight conversion that does not alter the existing roof profile is generally exempt from planning permission. Dormer conversions and hip-to-gable loft extensions typically require a planning application. Proposed new government exemptions may broaden what is covered in the near future. We assess every project individually and advise you clearly before any work begins.

A well-executed attic conversion or loft extension in Dublin typically adds between 10% and 20% to the value of your home, with en-suite bedroom conversions at the higher end of that range. In areas where an extra bedroom significantly moves a property up in price bracket — for example from a 3-bed to a 4-bed valuation — the return on investment can be particularly strong.

Yes, in almost all cases. The majority of the structural work on an attic conversion happens at roof level, above the existing ceiling. The most disruptive phase is the installation of the new staircase and the opening into the existing landing, which we complete as quickly and cleanly as possible. We keep the site secure and tidy throughout and work to a clear programme so you always know what to expect each week.

In Ireland the terms are largely interchangeable. An attic conversion typically refers to converting the existing roof space within the current roof structure, while a loft extension usually implies some modification to the roof itself — such as adding a dormer or extending a hip to a gable — to increase the usable space. We use both terms and are experienced in all types, from simple Velux conversions to large dormer and hip-to-gable loft extensions.

A structural engineer's specification is required for all attic conversions to ensure the existing floor joists can carry the additional load and that any structural alterations are properly designed. For dormer or hip-to-gable loft extensions requiring planning permission, architectural drawings will also be needed. We work with trusted engineers and can coordinate this on your behalf, managing the full process from initial assessment through to BCAR sign-off on completion.

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Over 30 years completing attic conversions across Dublin
Free headroom and structural assessment
Fixed-price contracts with no hidden costs
Full planning assessment included
BCAR compliant, Certificate of Compliance on handover

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