Whole-house retrofit · Northern Ireland

Whole-house retrofit in Derry City and Strabane

We deliver whole-house retrofit works on social homes in Derry City and Strabane, sequenced fabric first and coordinated with your retrofit assessor and coordinator.

Whole-house retrofit in Derry City and Strabane is carried out by our site teams and specialist subcontractors under our management, with photographs, notes and certificates on every job. Social homes in Derry City and Strabane are owned by the Northern Ireland Housing Executive and housing associations.

Derry City and Strabane at a glance

Council: Derry City and Strabane District Council
Nation: Northern Ireland
Council homes: Housing Executive and housing associations
Housing standard: Decent Homes Standard (NI)
Damp and mould timescales: No timescale law found
Population: 151,109 (2020 estimate)
Regional price factor: 0.90 (our estimate)

In Northern Ireland the Housing Executive, not the council, is the public landlord. Population: ONS 2020 mid-year estimate.

Who owns the social homes in Derry City and Strabane?

In Northern Ireland, councils are not housing authorities. Social homes in Derry City and Strabane are owned by the Northern Ireland Housing Executive and by registered housing associations, which are regulated by the Department for Communities.

What do we cover in Derry City and Strabane?

Coordination with your retrofit assessor and retrofit coordinator
Fabric measures: external, internal and cavity wall insulation, loft and floor insulation
Windows and doors, draught-proofing and airtightness details
Solar PV where it is part of the design
Handover data for lodgement and post-installation evaluation

How do we deliver it?

Residents get a plain-English guide to their new heating and ventilation at handover. A heat pump that is run like a gas boiler will disappoint everyone.

Which rules apply in Derry City and Strabane?

PAS 2035:2023 sets the whole-house retrofit process (assessment, coordination, design, installation and evaluation), and PAS 2030:2023 covers installation. Most government-backed retrofit schemes require both, with TrustMark lodgement.

Decent Homes Standard (NI) · More about whole-house retrofit

What does whole-house retrofit cost in Derry City and Strabane?

Our guide range for whole-house retrofit towards EPC C in Derry City and Strabane is £12,150–£21,250 per home. That is the UK range of £13,500–£23,600 (published figure) adjusted by a regional cost factor of 0.90 (our own estimate); figures are before VAT where the source states it. Every job is priced after survey; specification, access and the condition of the homes will move the figure.

Questions about whole-house retrofit in Derry City and Strabane

Who is the social landlord in Derry City and Strabane?

Which housing standard applies in Derry City and Strabane?

In Northern Ireland, the Housing Executive and registered housing associations work to the Northern Ireland Decent Homes Standard, which the Department for Communities consulted on revising in 2025–26.

Can you take on whole-house retrofit in Derry City and Strabane as a subcontractor?

Yes. Main contractors working for social landlords in Derry City and Strabane can engage us as a tier-2 subcontractor for whole-house retrofit, working under their systems and their client's specification.