Attic Conversion Lucan

Attic Conversions in Lucan

Lucan grew faster than almost anywhere else in Dublin, and the houses show it. Outside the older village core, most of the estates went up between the late 1970s and the 2000s, and that build era decides more about your attic conversion than anything else does.

We survey the roof first, tell you which of the two situations below you are in, and price it from there.

The Trussed Roof Question

Houses built in Lucan from roughly the 1980s onwards almost always have a prefabricated trussed roof. Instead of a few large timbers with open space between them, the roof is a series of factory-made W-shaped frames, and the diagonal webs run straight through the middle of the space you want to use.

This is the most common surprise for Lucan homeowners. You cannot simply board it out and call it a room. The webs have to be removed and the roof load transferred onto a new structural system first. That is engineered work, not carpentry.

It is entirely doable and we do it regularly. It just needs to be in the quotation from the start rather than discovered halfway through, and it is the main reason an attic conversion on a Lucan estate house costs more than the same job on an older property.

Houses in and around the older parts of Lucan village, and anything built before the mid-1970s, are more likely to have a traditional cut roof with purlins. Those are considerably more straightforward.

Head Height and Hip Roofs

The other thing we measure on the first visit is head height. Many Lucan estate houses have shallower roof pitches than older Dublin housing stock, which leaves less usable height once the new floor is built up and insulation goes in at rafter level.

Where height is tight, the options are usually a dormer to gain both headroom and floor area, or a hip-to-gable alteration on a semi-detached or end-of-terrace house, which squares off the sloping end of the roof and often adds more usable space than people expect.

If the height genuinely will not work, we will tell you at survey rather than after you have committed.

Planning Permission in Lucan

Lucan is in the South Dublin County Council area, and that is who we deal with on your behalf.

As a general position, converting an attic within the existing roof profile, lit by rooflights, is usually straightforward from a planning point of view. Adding a dormer changes that, particularly a dormer visible from the road, and rear dormers have their own limits. A hip-to-gable alteration changes the roof shape and needs to be assessed on its own terms.

Rules change and every site is different, so we confirm the position for your specific property with South Dublin County Council before any work is committed to. Whatever the planning outcome, an attic being used as a habitable room also has to satisfy building regulations, including fire safety and a compliant stairs.

Attic Flooring and Boarding in Lucan

Not every enquiry is a full conversion. A good number of Lucan homeowners want the attic boarded for storage rather than turned into a bedroom, and on a trussed roof that still needs doing correctly.

The boards must sit on a raised platform above the insulation, never directly on top of it. Insulation compressed flat under floorboards stops working, and putting it right later means lifting a floor you have already paid for. On a trussed roof the platform also has to avoid loading the ceiling ties in a way they were never designed for.

Done properly, attic storage is a fraction of the cost of a conversion and a sensible option where head height rules out a room.

Attic Insulation in Lucan

Insulation and conversion are two different jobs and it is worth being clear which you need.

If the attic is staying as a cold roof space used for storage, insulation goes at joist level, across the attic floor, keeping heat in the rooms below. If the attic is becoming a room, the insulation has to move up to rafter level so the space itself sits inside the warm envelope.

Getting this the wrong way round is a common and expensive mistake. Full detail on both, along with wall and floor insulation, is on our home insulation page, and there is a separate page on spray foam insulation if you are weighing that up.

What You Get From Us

• A free survey that tells you what your roof actually is, trussed or cut, and what that means for cost
• An honest head height assessment before you commit to anything
• A fixed written quotation with the structural work priced in from the start
• Planning and building regulations handled with South Dublin County Council
• A dedicated project manager for the duration of the build
• Fully insured, CIRI-registered contractor

For the full picture on conversion types, our process and what is involved from survey to completion, see our main attic conversion page.