Calculate your home insulation cost
Loft insulation cost by property type in Brighton
UK £654£650
UK £825£850
UK £1,206£1,250
UK £1,205£1,250
Cavity wall insulation by property type
UK £950£1,000
UK £1,800£1,850
UK £2,700£2,800
UK £2,400£2,450
UK £4,600£4,750
Cavity insulation rates
What can change a real Brighton quote?
- Loft or cavity-wall insulation
- Property type and measured area
- Existing insulation depth
- Glass wool, mineral wool, EPS or foam specification
- Wall exposure, condition and damp risk
- Access and removal of old insulation
- Repairs identified by the survey
Local planning considerations
Coastal exposure, conservation areas, parking and restricted access can affect individual quotations beyond the broad South East planning model.
- Exterior specifications may need more attention where a property is exposed to coastal weather and salt-laden air.
- Tight street access or controlled parking can change waste, scaffold and delivery logistics even when the underlying project is unchanged.
- Check listed-building or conservation constraints before assuming a standard window, roof, rendering or extension specification.
How the regional model works
The broad South East factor is 1.15×, while the live insulation calculator uses 1.030×. Only 20% of the broad regional difference is applied because insulation jobs contain a meaningful material component and the published national benchmarks already span property size and system type.
Sources
UK loft and cavity wall insulation cost guidance
Published / checked: Checked September 2026
Used for: Loft insulation property benchmarks and cavity wall per-m² costs
Frequently asked questions
How much does home insulation cost in Brighton in 2026?
Current loft-quilt examples are £654 for a terrace, £825 for a semi-detached house, £1,206 for a detached house and £1,205 for a bungalow. The model gives about £850 as the typical semi-detached loft reference in Brighton.
How much does cavity wall insulation cost in Brighton?
Current national property examples range from £950 for a flat to £4,600 for a detached house, with £2,700 for a semi. The model gives about £2,800 for the semi-detached example.
What are the current cavity-wall rates per square metre?
Glass wool is about £25–£30 per m² nationally and polyurethane foam about £30–£65 per m². The modelled Brighton rates are £26–£31 per m² and £31–£67 per m² respectively.
Does every home qualify for cavity wall insulation?
No. Wall construction, cavity width, exposure, damp, cracks and wall-tie condition should be checked before installation. A suitability survey is important.