Latest accounts reveal the East Midlands offsite specialist, which delivered the Hinkley Point site worker village, suffered a £0.74m loss this year after falling £3.7m into the red in 2018.
The firm said it had a very strong order book and pipeline and was forecasting a return to the black in the year ending March 2020.
While revenue slipped by 5% to £50m, the decline was a reflection of the completion of a large order for the nuclear power station worker accommodation.
During the year over £1m was invested in recruitment of staff to service expected growth, significantly strengthening design and project management.
Caledonian Modular said it expected to undertake a substantial pipeline of schools work in the next two years after securing top place on Batch C and second on Batch C of the Department for Education and Schools modular construction framework.
