One Stop Shop Retrofit Ireland: Full Home Retrofit Guide
The One Stop Shop scheme lets a single registered provider manage your entire home retrofit — from technical assessment to contractor coordination to grant claim. Grants can cover up to 50% of the cost. This guide explains how it works, who qualifies, and when it makes sense versus individual grants.
Check If OSS Is Right for My HomeHow Much Does the One Stop Shop Grant Cover?
Unlike individual grant amounts (e.g. the heat pump system grant), the OSS grant is calculated as a percentage of your total retrofit cost:
Up to 50%
Of total retrofit cost
Subject to scheme maximums
B2 BER
Minimum target rating
Home must reach at least B2
€10,000–€25,000+
Typical grant range
For deep retrofits
The OSS and individual Better Energy Homes grants cannot be combined for the same measures. If you use a One Stop Shop provider to install attic insulation, you cannot separately claim the €1,500 attic insulation Better Energy Homes grant. Choose one route before starting.
Who Qualifies for the One Stop Shop Scheme?
The OSS scheme is designed for deeper retrofits involving multiple measures. It has stricter requirements than individual grants:
Owner-occupied home built before 2011
The property must be your primary residence and have been built and occupied before 31 December 2010.
Home must be capable of reaching B2 BER
The technical assessment will confirm whether your home can reach a minimum B2 energy rating after the planned upgrades. Homes with structural issues may not qualify.
Minimum of 2 energy upgrade measures
The OSS is designed for whole-home retrofits. Single-measure upgrades (e.g. attic only) are better suited to individual Better Energy Homes grants.
Using an SEAI-registered OSS provider
All works must be managed by an SEAI-registered One Stop Shop provider. You don't choose individual contractors — the provider does this.
Technical assessment completed first
Before any work starts, an SEAI technical assessor (arranged by your OSS provider) surveys your home and produces a retrofit plan.
What the One Stop Shop Process Looks Like
Contact an SEAI-registered OSS provider
Choose a provider from the SEAI register (see examples below). They handle everything from here. You don't need to manage contractors yourself.
Technical assessment of your home
The provider arranges an SEAI technical assessor to survey your home. This produces a recommended retrofit plan and confirms your starting BER.
Retrofit plan and quote agreed
The provider produces a detailed proposal — which measures, which contractors, estimated costs, and estimated grant support. You approve before proceeding.
Grant application submitted
The OSS provider submits the grant application to SEAI on your behalf. Work cannot begin until written approval is received.
Works are carried out
The provider manages all contractors and stages of work. You don't need to coordinate — they handle scheduling, inspections, and completion.
Post-work BER confirms B2 rating
After completion, a new BER assessment confirms your home has reached at least B2. This is required to release the grant payment.
Grant paid to provider; you pay the balance
SEAI pays the grant directly to your OSS provider. You pay the net amount (total cost minus grant) to the provider.
Registered One Stop Shop Providers (examples)
Bord Gáis Energy
OSS provider — manages full retrofit projects
SSE Airtricity
Home upgrade and OSS services
SuperHomes (Tipperary Energy Agency)
Non-profit OSS provider, nationwide
Always verify current registration at seai.ie before signing any contract.
Common Mistakes With the One Stop Shop
Choosing OSS when individual grants are more appropriate
If you only want one or two upgrades (e.g. attic and heat pump), individual Better Energy Homes grants are simpler and may be better value. OSS makes most sense for 4+ measures targeting B2.
Starting any work before written approval
Even with an OSS provider managing the process, work cannot begin until SEAI issues written grant approval. Confirm this date explicitly before any contractor arrives.
Not comparing OSS providers
There are multiple registered OSS providers. Their costs, contractor networks, and service quality vary. Get at least 2 proposals before committing.
Not understanding the B2 minimum
If your home cannot reasonably reach B2 (very old, very poor condition), the OSS grant will not apply. A technical assessment before committing will clarify this.
Trying to claim individual BEH grants alongside OSS for the same measures
This is not permitted. Attempting it will result in grant clawback. Declare all planned works to your OSS provider upfront.
Realistic Costs vs Grant Support
A full deep retrofit is a significant investment. The OSS grant meaningfully reduces the cost but you will still pay the majority of the bill:
| Scenario | Total Retrofit Cost | OSS Grant (50%) | You Pay |
|---|---|---|---|
| Modest retrofit (attic + heat pump) | €12,000–€18,000 | €6,000–€9,000 | €6,000–€9,000 |
| Mid-range retrofit (multiple measures) | €20,000–€35,000 | €10,000–€17,500 | €10,000–€17,500 |
| Full deep retrofit (EWI + heat pump + solar + attic) | €35,000–€60,000 | €17,500–€25,000* | €17,500–€35,000 |
*Grant subject to maximum scheme limits in place at time of application. Figures are illustrative. Always verify current maximums with SEAI and your OSS provider.
Use the HomeUpgrade Grant Navigator to See What Applies to Your Home
Answer 5 questions about your home and find out whether the One Stop Shop, individual grants, or the Warmer Homes Scheme applies to your property — with indicative costs and grant amounts.
Start Grant NavigatorFree · No sign-up · Under 5 minutes