However, Jez Bond's intention was always to stage more in-house productions, leading the theatre to devise innovative fundraising strategies.

[28] The second in-house production of 2018 was the world premiere of Danny Robins' The End of the Pier, directed by Hannah Price, beginning in July.

[29] In July 2019, the theatre staged Whodunnit [Unrehearsed], in which celebrity actors including Gillian Anderson, Damian Lewis, and Joanna Lumley donated their time for one-off performances in a murder mystery.

The stars, unlike the rest of the cast, did not see the script or attend rehearsals before their performance, and had to "solve the crime in real time, with only an earpiece feeding them lines as they attempt to crack the case.

The sold-out 2024 show featured a mix of new (Martin Freeman, Adrian Lester, Katherine Ryan) and returning celebrities (Anderson, Benedict Cumberbatch, Emma Thompson), and was described by The Daily Telegraph as "“The glitziest star vehicle yet conceived for the off-West End, perhaps even for London theatre.”[35] Park Theatre's Script Accelerator programme began in 2013, inviting producers or theatre companies to pitch a play they would like to develop.

Hot Coals Theatre Ensemble's Storm in a Teacup (February 2014)[37] and Michael Ross's Happy to Help (June 2016)[38] were both Script Accelerator selections which went on to play in Park90's regular season.

The theatre has a policy of transparency and open-book accounting for both in-house and incoming productions, in an effort to ensure that actors are properly paid.

In February 2019 the theatre initiated the Prism Project, offering free rehearsal and performance space to minority ethnic artists.

Focused on providing support and professional opportunities to traditionally under-served groups within the theatre community, the project is open any artist from a BAME background.