Robert Cody, of New York-based firm Amoia Cody Architects, was victorious with this scheme which will be built on the beachfront at Chapel St Leonards.
The boathouse contest is one of a series of competitions being run under the Bathing Beauties banner - a project conceived by artist Michael Trainor to create 'dramatic and beautiful new seaside architecture' along a forgotten 10-mile stretch of coastline south of Mablethorpe.
Cody, who bagged £3,500 for his winning design, described the proposals 'as an extension from the landscape- offering a fluid experience from the footpath to the beach.'
Titled Architectural Lines in The Sand, the new building will have a 'curved' boathouse with direct access to the beach above, with a terrace and restaurant which can be either enclosed or left open to Lincolnshire's famous 'bracing' sea air.
At the top of the proposed ramp will be a dune-viewing or birdwatching platform.
The competition-winning scheme was chosen narrowly ahead of designs from Paul Jones and Ceri Green who worked on their entry with students from Northumbria University, Newcastle-upon-Tyne.
The contest was run alongside another popular competition to design the next generation of beach huts.
Details of all four winning schemes can be revealed on www.ajplus.co.uk tomorrow.