Typical planning ranges in Belfast
What the Northern Ireland factor means
Our broad 0.89× regional model sits 11% below the national planning baseline. It is a UK Home Costs planning assumption rather than an externally measured city-wide price index. For projects with a large nationally priced equipment or materials component — such as solar, windows, EV chargers, insulation, underfloor heating and consumer units — the table uses only the documented share of that broad regional difference used by the corresponding calculator.
Planning considerations in Belfast
- Northern Ireland regulations, approvals and support schemes should be checked independently from England, Wales and Scotland guidance.
- Regional material supply, specialist-trade availability and travel can affect individual quotes beyond the broad model factor.
- For major refurbishment, keep surveys, remedial work and compliance costs separate from visible finish upgrades.
How to use these figures
Northern Ireland has different policy and grant arrangements from Great Britain, so scheme-specific calculator assumptions should be checked carefully.
Start with the table to understand project scale, then use a calculator to add floor area, condition, finish level and other project-specific inputs. A postcode-aware calculator can infer the same broad region while still allowing a manual override.
Compare this region with all locations
Detailed project cost guides in Belfast
These pages apply the same transparent regional model — or the calculator's documented moderated regional treatment where appropriate — to detailed project tables rather than publishing a single city-wide headline figure.
Extension cost
Modelled Belfast extension cost using the current £1,800–£3,000 per m² national benchmark before VAT and the UK Home Costs Northern Ireland regional planning model.
£1,800–£3,000 per m² national benchmark before VATOpen Belfast guide →2026 regional guideLoft conversion cost
Modelled Belfast loft conversion cost using the current £22,500–£80,000 across common 2026 conversion types and the UK Home Costs Northern Ireland regional planning model.
£22,500–£80,000 across common 2026 conversion typesOpen Belfast guide →2026 regional guideRoof replacement cost
Modelled Belfast roof replacement cost using the current £4,000–£19,000 for most roof replacements; £8,000 UK average and the UK Home Costs Northern Ireland regional planning model.
£4,000–£19,000 for most roof replacements; £8,000 UK averageOpen Belfast guide →2026 regional guideHouse rewire cost
Modelled Belfast house rewire cost using the current £3,000–£12,500 across common flats and houses and the UK Home Costs Northern Ireland regional planning model.
£3,000–£12,500 across common flats and housesOpen Belfast guide →2026 regional guideNew boiler cost
Modelled Belfast new boiler cost using the current £2,500–£4,000 like-for-like combi; £3,000–£15,000 broader installed projects and the UK Home Costs Northern Ireland regional planning model.
£2,500–£4,000 like-for-like combi; £3,000–£15,000 broader installed projectsOpen Belfast guide →2026 regional guideSolar panel cost
Modelled Belfast solar panel cost using the current £6,000–£10,000 for 3–6 kW solar-only systems; about £8,000 for 4 kW and the UK Home Costs Northern Ireland regional planning model.
£6,000–£10,000 for 3–6 kW solar-only systems; about £8,000 for 4 kWOpen Belfast guide →2026 regional guideKitchen renovation cost
Modelled Belfast kitchen renovation cost using the current £5,250–£28,400 current fitted-kitchen range; £10,550 UK average and the UK Home Costs Northern Ireland regional planning model.
£5,250–£28,400 current fitted-kitchen range; £10,550 UK averageOpen Belfast guide →2026 regional guideBathroom renovation cost
Modelled Belfast bathroom renovation cost using the current £5,500–£8,000 typical new bathroom; £7,000 UK average; £14,000+ high-end and the UK Home Costs Northern Ireland regional planning model.
£5,500–£8,000 typical new bathroom; £7,000 UK average; £14,000+ high-endOpen Belfast guide →2026 regional guideWindow replacement cost
Modelled Belfast window replacement cost using the current £500–£5,000+ per double-glazed window by type; £8,000–£15,000 for a typical 3-bed house and the UK Home Costs Northern Ireland regional planning model.
£500–£5,000+ per double-glazed window by type; £8,000–£15,000 for a typical 3-bed houseOpen Belfast guide →2026 regional guideHome insulation cost
Modelled Belfast home insulation cost using the current £654–£1,206 for common loft-quilt examples; £950–£4,600 cavity-wall examples by property type and the UK Home Costs Northern Ireland regional planning model.
£654–£1,206 for common loft-quilt examples; £950–£4,600 cavity-wall examples by property typeOpen Belfast guide →2026 regional guideEV charger cost
Modelled Belfast ev charger cost using the current about £1,000 typical home installation; eligible 2026 OZEV grants cover 75% up to £500 per socket and the UK Home Costs Northern Ireland regional planning model.
about £1,000 typical home installation; eligible 2026 OZEV grants cover 75% up to £500 per socketOpen Belfast guide →2026 regional guideExternal wall insulation cost
Modelled Belfast external wall insulation cost using the current £150–£200 per m² installed; £6,000–£30,000+ across common property examples and the UK Home Costs Northern Ireland regional planning model.
£150–£200 per m² installed; £6,000–£30,000+ across common property examplesOpen Belfast guide →2026 regional guideUnderfloor heating cost
Modelled Belfast underfloor heating cost using the current £50–£110 per m² across electric and wet new-build or renovation systems; £3,000–£13,000 for many full-property installs and the UK Home Costs Northern Ireland regional planning model.
£50–£110 per m² across electric and wet new-build or renovation systems; £3,000–£13,000 for many full-property installsOpen Belfast guide →2026 regional guideConsumer unit cost
Modelled Belfast consumer unit cost using the current about £485 for a typical installed 10-way RCBO unit; roughly £350–£800 by circuits and property size and the UK Home Costs Northern Ireland regional planning model.
about £485 for a typical installed 10-way RCBO unit; roughly £350–£800 by circuits and property sizeOpen Belfast guide →Popular calculators
House renovation
Refine the Belfast planning range with project-specific inputs.
Open calculator →Live calculatorHouse extension
Refine the Belfast planning range with project-specific inputs.
Open calculator →Live calculatorLoft conversion
Refine the Belfast planning range with project-specific inputs.
Open calculator →Live calculatorGarage conversion
Refine the Belfast planning range with project-specific inputs.
Open calculator →Live calculatorKitchen renovation
Refine the Belfast planning range with project-specific inputs.
Open calculator →Live calculatorBathroom renovation
Refine the Belfast planning range with project-specific inputs.
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