The completed contracts are at Ulverston in Cumbria and on the seafronts at Bridlington and Rhyl.
Medlock is currently building a 24-bedroom extension at the Stockport South Premier Inn, where it also making improvements to the lobby and reception area. The scheme is due for completion in April.
Meanwhile, the firm is also constructing a four-storey annex at a Premier Inn at Hanley, Stoke-on-Trent. The project is due for completion in the summer and will create an additional 44 bedrooms.
The total value of the five Premier Inn contracts is nearly £15m.
At Ulverston, Medlock has built a 79-bedroom hotel which includes a Thyme restaurant and breakfast bar. It is the company’s third Premier Inn project in Cumbria, following ones in Penrith and Cockermouth.
The Bridlington scheme sees the first newly-built hotel open in the resort since the 1930s. It has 82 bedrooms plus a Cookhouse and Pub restaurant on the ground floor.
On Rhyl’s promenade, Medlock has built a 70-bedroom hotel which also features a Cookhouse and Pub.
The Premier Inn chain is owned by Whitbread, which operates over 760 hotels across the UK with more than 68,000 rooms. Whitbread aims to have 85,000 rooms by 2020.
Dan Lewis, project director at Medlock, said: “The three newly-completed schemes mean we have now successfully delivered 10 Premier Inn projects for Whitbread over the past three years.
“We are delighted to see our relationship with Whitbread continue with the latest projects at Stockport South and Stoke-on-Trent.”