Flats and blocks · County Londonderry
EWI for flats and blocks in Derry~Londonderry
From Derry~Londonderry to Strabane, we price EWI for flats and blocks after a measured survey — no guesswork, and no work starts until the price is agreed in writing. For blocks in Derry~Londonderry, we start with height, storeys and the planning position, because those decide the system.
- Free survey in BT48 and nearby
- Guide price from £110 per m² + scaffold, 0% VAT
- Fixed written price before work starts
Free survey in Derry~Londonderry
Postcode, service and a phone number is all we need.
Part of every quote
- We work with managing agents on resident communication
- Mineral wool systems where building height or guidance requires them
- One programme and one finish across the whole building
- Planning permission is needed for flats and maisonettes
What we look for in Derry~Londonderry
We also cover Strabane and Limavady, close to Derry~Londonderry. Northern Ireland has many rendered and pebble-dashed homes, older solid-walled rural houses, and estates built by the Housing Executive.
Parts of County Londonderry fall in the higher wind-driven rain exposure bands, especially coastal and upland sites, so render specification, movement joints and detailing at cills, verges and the base of the wall matter more than usual.
Freeholders and managing agents in Derry~Londonderry get a written specification and pricing they can share with owners.
- Postcode district
- BT48
- County or area
- County Londonderry
- Nation
- Northern Ireland
- Nearby
- Strabane, Limavady, Coleraine, Omagh
Approvals in Northern Ireland
For Derry~Londonderry homes, the council's planning office has the final say on external changes; conservation areas, flats and listed buildings need an application or consent.
External wall insulation is building work under the Building Regulations (Northern Ireland) 2012, so council building control is involved, with Technical Booklet F1 covering dwellings.
On taller buildings in Northern Ireland we specify non-combustible mineral wool systems and confirm the classification with building control, in line with Technical Booklet E.
For flats, the lease or management agreement sets how owners agree to the work and share its cost.
How disruptive is it for residents?
Most work happens from scaffolding outside. Residents may need to allow brief access to extend window cills, vents or flues from the inside. We provide a notice for residents covering dates, scaffold, and how to raise concerns.
EWI for flats and blocks prices in Derry~Londonderry
| Item | Guide price | Notes |
|---|---|---|
| Mineral wool system on a low-rise block | £110–£190 per m²0% VAT | Priced on survey |
| Scaffold and access | Priced per building | Includes licences where needed |
| Specification and pricing pack for consultation | Included with quote |
Confirmed by a fixed written quote after survey. 0% VAT: installing insulation in a home is zero-rated until 31 March 2027, so these figures are the total; 5% applies from 1 April 2027.
What happens next
Get a guide price
Try the online quote tool for a ballpark figure.
Book the survey
A visit at a time that suits you.
Agree the quote
Nothing starts until you've signed the written price.
We do the work
Planned around weather, with you kept informed.
Flats and blocks in Derry~Londonderry: questions
Can one flat have external wall insulation on its own?
Rarely. The outside walls are usually owned by the freeholder, the result would look patchy, and planning is unlikely. Whole-building schemes are the norm.
Do flats need planning permission for EWI?
Yes. Permitted development rights for external alterations apply to houses, not flats or maisonettes, so an application is needed.
Do you cover Derry~Londonderry?
Yes — we survey and quote EWI for flats and blocks in Derry~Londonderry (BT48) and nearby Strabane, Limavady and Coleraine, with a fixed written price before any work starts.