Can I start work before my SEAI grant is approved?
No. You need the grant offer before any work starts or any materials are bought, and SEAI does not backdate grants.
SEAI’s rule, in its own words
The offer has to be in place before work starts.
“You must have grant approval in place before you start work.” SEAI: Individual grants: Homeowner Application Guide, read 25 Sept 2026
Buying materials first rules the grant out.
“You have already either purchased materials for your individual energy upgrade measure or started your grant aided works.” SEAI: Individual grants: Homeowner Application Guide, read 25 Sept 2026
Grants are not backdated.
“No. Grants cannot be backdated.” SEAI: Windows and doors grant, read 13 Jul 2026
You have 30 days to accept an offer.
“Once you receive your offer, you have 30 days to accept.” SEAI: Attic insulation grant, read 13 Jul 2026