The council’s 2025 filming income represents a significant rise from previous years, which saw the authority bring in £54,000 in 2023 and £170,000 in 2024.
Council staff moved into new offices in 2023, and the authority approved plans to sell County Hall last year.
A spokesperson said that income from filming helped “offset some costs” of running the building, which were about £2.4m a year.
They added: “We welcome filming requests and are pleased that County Hall’s historic and architectural character continues to attract productions, supporting the growth of Hertfordshire’s film industry.”