PCS, with 20 staff and based in Stratford, said it wanted to take over seven-strong RGS in Rugby to offer a one-stop service for clients across several sectors including education, leisure and historic landscapes.
"We were looking for a good fit with our specialisms," said PCS business development manager Simon Hewitt. "Roger was looking to retire and we’ve worked with the firm before. They have a number of very loyal clients."
He said it was too early to say if there would be a name change or merger of premises. PCS is looking to take on two landscape architects and a planning consultant.
Managing director Jackie Evans said: "RGA will perfectly complement the landscaping team here at PCS and will result in us being able to offer a better service to our clients.
"The addition of the experienced landscape architects and urban-design team in conjunction with PCS’s landscape management and environmental team offers all our customers a true one-stop solution."
PCS landscape architects and project managers won a West Midlands award from the Royal Institute of British Architects earlier this year for work to Wyre Forest Crematorium, a 9ha site, praised for its aesthetically pleasing, functional and sustainable landscape by lead landscape architect Kevin Salmon and project manager Pauline Roper.