Roof Replacement Costs in Northern Ireland: 2026 Price Guide

A roof is the one job nobody plans for. Extensions and kitchens get saved for; roofs get replaced the winter the leak wins. That urgency is exactly why it pays to know the numbers before you need them — a distress purchase is where overpaying happens.

Here is what a full roof replacement actually costs in Northern Ireland in 2026, what drives the price, and the questions that sort a good roofing quote from a bad one.

The headline numbers

For a full strip and re-cover — old covering off, new treated battens and breathable membrane on, new covering, ridge and flashings — Northern Ireland prices in 2026 run roughly:

The all-in columns include scaffolding and a 10 per cent contingency, which is how our roof replacement calculator builds the figure — put your own roof through it for a number priced to your postcode.

Two things about that table. First, the per-square-metre rate is for the sloping surface, both sides of the ridge — not the floor plan. A rough conversion is the house footprint times 1.4 for a typical pitch. Second, Northern Ireland sits well below the mainland UK average for roofing labour, which is why guides written for England will overshoot here.

Where the money goes

On a typical £10,000 re-roof, the covering itself is usually less than half the bill. The rest is labour for the strip and re-fix, the scaffolding, the battens and membrane, the leadwork around chimneys and valleys, and skip hire for what comes off.

Scaffolding deserves its own line on any quote you accept. A full perimeter scaffold on a semi runs £800 to £1,600 here. If a quote is mysteriously cheaper than the others, this is the first place to look — either it is missing, or the plan is to work off ladders, which you do not want on a strip.

What the strip reveals

No roofer can see the state of your timbers until the covering is off, and no honest one will promise you nothing extra. The common finds, roughly in order of likelihood:

• Rotten rafter feet and wall plates — near-standard on pre-1960 houses, a few hundred pounds to sister or splice
• A chimney that needs repointing — cheap while the scaffold is up, expensive as a separate job later
• Failed valleys — the metal or fibreglass channels where two slopes meet
• Nail sickness on old slate roofs — the slates are fine, the nails holding them have rusted through, which is why they keep slipping

This is what the contingency is for. Ten per cent is the sensible minimum; on a roof over 60 years old, plan for finding something.

Repair or replace?

A handful of slipped tiles after a storm is a repair — a few hundred pounds, job done. Replacement earns its money when:

• you are paying for patch repairs most winters
• slates are slipping across the whole roof, not in one spot (nail sickness)
• the underfelt has gone brittle and torn, and daylight is visible in the loft
• the roof is at the age where its covering type gives up: 40–50 years for concrete tile and fibre-cement, longer for clay and slate

A useful test: add up what the last three years of patching cost, and ask what three more winters will add. If it approaches ten per cent of a re-roof, you are already paying for the new roof — slowly, and without getting it.

Rules to know in Northern Ireland

Building control. Re-covering like for like is generally fine. Re-covering with a different material — concrete tile where slate was, or anything that changes the roof's weight — needs a building control application to your district council, and the structure may need checking for the new load. Councils apply this individually, so confirm with yours before the strip is booked.

Planning permission is rarely needed for a re-roof in the same profile, but conservation areas and listed buildings are a different world — in those, the covering may have to match what came off, right down to the slate type.

Bats. They roost in roofs and are legally protected here. Any sign of them means a survey before work starts. A decent local roofer will know the drill.

While the scaffolding is up

Scaffolding is a third of your fixed cost, so use it. Jobs that cost a fraction done during the re-roof compared to done separately:

• new fascias, soffits and gutters (£1,300–£2,700 alongside a re-roof)
• chimney re-flashing and repointing
• a rooflight into a loft you might convert one day
• topping the loft insulation up to 300mm — the trades are there and the loft is open

Questions that sort roofers

1. Is scaffolding included, and is it a full perimeter scaffold?
2. Does the price include stripping and disposal — and whose skip?
3. New battens and breathable membrane throughout, or re-use?
4. What is the rate for timber repairs if you find rot, per metre?
5. Who does the leadwork — you, or a subcontractor?
6. What guarantee, and is it insurance-backed or just a promise?

Get three quotes with those answered in writing and the cowboys filter themselves out.

Costs in this guide were reviewed in August 2026 and are indicative, not quotations. Run your own roof through the calculator for a figure priced to your postcode, then get written quotes.