Kingfisher, the world's third biggest DIY retailer, is accelerating the makeover of its French Castorama chain following a sales uplift at revitalised stores.
Three new-look stores were piloted last autumn, and the number of revamped and relocated shops now stands at 12.
The sales rise at the updated outlets is understood to be well into double digits, although Kingfisher has not yet released figures.
A spokesman said it was still too early to gauge the overall effect of the programme.
The next phase in the overhaul of the 104-store chain will kick off in October at Poitiers. Across the business, 13 per cent of space will be converted by the end of the financial year, rising to 27 per cent the year after. A total of 20 to 30 stores will be converted and 40 to 50 will be refreshed.