More than £100,000 in grants will be split between 24 theatres across England, Northern Ireland, Scotland and Wales through the Theatres Trust Small Grants Programme.
The scheme, run with The Linbury Trust, funds projects with up to £5,000 to improve the resilience, sustainability, or accessibility of theatres by making building improvements.
Recipients of the latest round of funding include Aberystwyth Arts Centre, Almeida Theatre in London, Blackpool Grand Theatre, Colchester Arts Centre, Pitlochry Festival Theatre in Scotland, Tyne Theatre and Opera House in Newcastle and The Welfare Ystradgynlais in Swansea.
Jon Morgan, Theatres Trust Director, said: "Theatres Trust is delighted to be able to support more theatres with small projects to make a big impact to their sustainability, accessibility and inclusivity, as well as vital maintenance projects.
"This is the largest round of this scheme to date, with the high number and wide range of projects demonstrating the demand for investment in the UK’s theatre buildings to ensure they are fit for current and future audiences."