Work on the seminal Hemel Hempstead site will involve waterways, a promenade, footpaths, surfaces, footbridge construction and landscaping work for green areas. Teams will tackle horticulture for parks, playgrounds and a historic garden including a watercourse. A community building and car park are also envisaged.
"We are looking to place the advert around mid June but just wanted to gauge the interest in this opportunity prior to going out to tender," said a spokesman. "A Heritage Lottery Fund (HLF) bid has been submitted and the council expects to hear whether we have been successful in early June."
Work is due to start in April 2015 and finish at the end of March the following year. The council was awarded a £106,000 HLF development grant BIG Lottery funds 18 months ago.
The project aims to reflect the historical significance of Geoffrey Jellicoe's original vision of a "city within a park". The gardens were designed and built in 1962.
Interested contractors should email email@example.com.