Is there a renovation cost calculator for Northern Ireland?

The trap with almost every renovation calculator online is the data underneath it. They are built for the GB market, and Northern Ireland trade pricing runs roughly 10 to 20 per cent below the GB average, so a GB calculator quietly inflates your budget, and worse, makes an overpriced NI quote look normal. An NI calculator has to be built on NI figures, which is why we built ours on the researched 2026 ranges from our published Cost Index, compiled from written NI quotes and published sources.

The free NI Quote Checker works both ways. Before you have a quote, use it as a cost calculator: pick the job (kitchen, bathroom, extension per square metre, rewire, boiler, insulation, roof or windows), choose the spec, and see the typical 2026 NI range for it, which is the number to budget and borrow against. After a quote arrives, it becomes a price checker: enter the figure, including how VAT was handled, and see in 30 seconds whether it sits below, within or above the typical NI range, with the questions worth asking before you accept.

For deeper planning than a single range, each job links to its full researched guide: extension costs per square metre by specification, kitchen costs broken down to the hidden extras, rewire pricing by house size. Every figure is dated, sourced and updated as NI prices move, and the underlying dataset is published openly if you want the raw numbers.

One honest limit: ranges are benchmarks, not valuations. Access, structural condition and specification genuinely move prices, so treat the range as your negotiating context and get two or three written, itemised quotes from vetted local trades before deciding. Post the job free on NI Trades and up to three vetted NI trades will quote it, which is the fastest way to turn a calculated budget into real numbers.