Guttering by Dublin House Type

On a Georgian house in Dublin 2, 4, 6 or 8, cast iron is usually required by conservation rules and costs €75–€90 per metre installed (indicative). On a Victorian or Edwardian terrace, aluminium at €65–€75 gives cast-iron looks without the weight. On a 1970s semi in Tallaght or Swords, uPVC at €50–€65 is the honest answer.

Summary

• Cast iron runs €75–€90 per metre installed and is the only material Dublin City Council and DLR conservation officers will typically approve on protected Georgian streets — Merrion Square, Fitzwilliam, Mountjoy, the North Great George's Street stretch.
• Aluminium at €65–€75 per metre installed lasts 40+ years, weighs a fraction of cast iron, and passes for it visually on Victorian redbrick in Rathmines, Portobello, Phibsborough and Drumcondra.
• uPVC at €50–€65 per metre installed is the right call on estate housing built from the 1960s onward — Tallaght, Clondalkin, Coolock, Swords — where there is no planning constraint and 30-year life is enough.
• A full replacement on a standard three-bed semi carries roughly 15–20 metres of gutter front and rear combined; multiply the per-metre rate to sanity-check any whole-job figure.
• Protected Structure status (check the Dublin City Council Record of Protected Structures) means you cannot swap cast iron for uPVC without permission, and doing so risks enforcement.
• The single biggest lever on price is material — moving from uPVC to cast iron on a 50-metre run shifts the job by roughly €3,000.

Why Dublin's housing stock decides the material

Dublin is not one city for guttering. It is four or five overlapping ones, and the era of the house usually dictates both what is up there now and what should replace it. A Georgian terrace on Fitzwilliam Square and a 1978 semi in Tallaght have almost nothing in common — different roof pitches, different fascia arrangements, different planning regimes, different rainwater volumes to move.

The three materials on the Dublin market — cast iron, cast or extruded aluminium, and uPVC — each earn their place on a specific kind of house. Getting the match right is the difference between a roofline that reads as correct and one that looks wrong from the street, and in conservation areas it is the difference between a legal job and a letter from the planning enforcement section.

Georgian houses: why cast iron is usually the only answer

Dublin's Georgian housing stock — roughly 1720 to 1840, concentrated in Dublin 2, Dublin 4 and parts of Dublin 1 and Dublin 8 — is where the constraints are heaviest. Most of these houses are on the Dublin City Council Record of Protected Structures, and many streets sit inside designated Architectural Conservation Areas (ACAs): Merrion Square, Fitzwilliam Square, Mountjoy Square, Henrietta Street, the North Great George's Street terrace, Portobello, and the Pembroke estate lands running through Ballsbridge.

Inside a protected terrace or an ACA, the rainwater goods are considered part of the building's character. Replacing original cast iron with uPVC — even in black — is a material alteration that ordinarily requires planning permission, and the planners will refuse it. Dun Laoghaire-Rathdown County Council takes the same line on its own protected stretches through Monkstown, Dalkey and Killiney.

What this means in practice:

• Original cast iron half-round or ogee gutters on 100mm or 125mm profiles, on rise-and-fall brackets fixed through the fascia into the wall plate.
• Repair over replacement wherever the section is sound. Surface rust that has pitted the metal is repairable — wire-brushed, primed with a zinc-rich primer, top-coated in gloss black. Rust that has eaten through the base of the gutter is not, and that length gets replaced with matching new cast iron.
• Cast iron downpipes into cast iron hoppers, discharging to the original gully positions. Swapping to plastic downpipes on a Georgian façade is as wrong as swapping the gutter.

Indicative price: €75–€90 per metre installed for new cast iron in matching profile, with new brackets, unions and outlets. A whole-house replacement on a Georgian terrace typically lands €5,500 and up because of the profile cost, the height, and the access. Confirmed free after a survey.

For a fuller walk-through of the compliance side, see our note on guttering on Dublin protected structures — the short version is that repair is nearly always the right first move on a Georgian house, and full replacement is a last resort quoted per job.

Victorian and Edwardian terraces: aluminium earns its place

The redbrick belt — Rathmines, Ranelagh, Portobello, Phibsborough, Drumcondra, parts of Kilmainham and Inchicore — is mostly Victorian and Edwardian, built roughly 1860 to 1910. Some of these streets sit inside ACAs (Rathmines and Ranelagh have designated stretches), but most individual houses are not protected structures. The planning constraint is lighter: keep the character, but the material is generally a matter of judgement rather than a legal requirement.

This is where cast aluminium does its best work. Extruded or cast aluminium in a moulded ogee profile reads as cast iron from the street, weighs about a tenth as much, will not rust, and comes powder-coated in matt black as standard. On a Victorian two-storey terrace where the original cast iron has finally failed after 120 years, aluminium at €65–€75 per metre installed delivers a 40-year-plus system without asking the fascia to carry cast-iron weight all over again.

Where aluminium is the right call:

• Failed original cast iron on a non-protected Victorian house, where the fascia has already been renewed in timber or uPVC and cannot take another cast iron run.
• Coastal exposure — Clontarf, Sandymount, Sutton, Dun Laoghaire — where wind loading pulls plastic away from the fascia and cast iron is heavier than the roofline warrants.
• Landlord and rental stock in the redbrick belt where a 40-year service life beats replacing uPVC three times over the same period.

There is one honest caveat. Aluminium is a specialist fit and the bracket spacing has to be right — 800mm centres on exposed elevations, closer on gables that catch the westerly. On any Victorian gable that overlooks open ground, we spec tighter. See our page on gutter replacement across Dublin for how the material choice runs through the quote.

1970s and 1980s semis: uPVC is the honest answer

Tallaght, Clondalkin, Coolock, Ballymun, Swords, Blanchardstown, Lucan — the great ring of local authority and speculative estate housing built from the late 1960s through the 1980s — was designed around 112mm half-round uPVC from day one. There is no conservation angle, no character to preserve in the rainwater goods, and no reason to spend cast iron money on a house that was built to receive plastic.

uPVC at €50–€65 per metre installed in black, brown, grey or white will give thirty years or more if it is fitted correctly and cleared on a schedule. On a standard 1970s three-bed semi carrying 15–20 metres of gutter front and rear, that puts a full replacement in the €1,000–€1,400 range, indicative and confirmed free after a survey.

Two things are worth flagging on this stock:

1. The original 112mm profile is often undersized for the roof it serves. Estate houses with wide roof planes and no valley discharge will overflow along the whole run even when perfectly clean. The fix is not repair — it is upsizing to a 125mm deep-flow profile, which moves roughly 40% more water. If a 1970s semi in Tallaght has overflowed in every heavy shower for the last two winters, the profile is the reason.
2. The fascia usually goes before the gutter. Painted timber fascia from 1975 that has been re-nailed and re-painted for fifty years has nothing left for a bracket to bite into. Doing the fascia, soffit and gutter in a single visit is considerably cheaper than doing them across two.

Newer developments: Citywest, Adamstown, Clonsilla

Estates built from the mid-1990s onward — Citywest, Adamstown, Clonsilla, Ongar, the Cherrywood build-out — generally have sound uPVC systems sized correctly for the roof area. The calls here are blockages, the occasional dislodged bracket after a westerly gale, and downpipes that discharge onto the ground rather than into a gully. A repair or a clean is almost always the right answer; a full replacement is rarely justified before year 25.

How much guttering does a Dublin house actually have?

Handy for sanity-checking any quote:

All figures indicative and confirmed free after a survey. The largest full replacement to date on this side of the business ran to €12,689 — a period property with cast iron on multiple elevations and full downpipe renewal.

Conservation rules in plain English

Two Dublin planning realities catch people out on guttering:

• Protected Structure status — check the Dublin City Council Record of Protected Structures, or the DLR equivalent, before you order anything. If your house is listed, changing the material of the gutters is works to a Protected Structure and needs consent.
• Architectural Conservation Area (ACA) status — even if your individual house is not protected, if the street is in an ACA (large parts of Rathmines, Portobello, Ranelagh, Ballsbridge and Dun Laoghaire), material changes visible from the public road can require planning permission.

The safe rule: on any pre-1920 house in central Dublin, ring the council's planning section before swapping material. On post-1960 estate housing outside a conservation area, match-material or upgrade freely.

When we recommend which

A quick reference we use ourselves when surveying a Dublin roofline:

• Georgian, protected or in an ACA → cast iron, repaired in matching sections wherever the metal is sound.
• Victorian redbrick, non-protected, coastal or exposed → aluminium in moulded ogee, black powder-coat.
• Victorian redbrick, non-protected, inland and sheltered → aluminium or uPVC in a heritage-look profile, homeowner's call.
• 1930s–1950s semi with sound fascia → uPVC half-round, 112mm.
• 1960s–1980s estate with overflow history → uPVC deep-flow, 125mm, upsized from the original.
• 1990s onward → repair or clean the existing uPVC; full replacement rarely warranted.