As a general rule, if the owner hired whoever drafted the construction plans, or if whoever drafted the faulty plans is an employee or agent of the owner, it is the owner who will be liable for defective plans.
Ing to Boundy (2012), typically, a written contract will include: Date of agreement. Names of parties to the agreement. Preliminary clauses. Defined terms. Main contract clauses. Schedules/appendices and signature provisions (para. 5).
Protect Yourself when Working with Custom Home Builders Only work with a licensed contractor. Get the contract in writing. Avoid “lump sum” bids. Talk to several contractors. Tie payments to deliverables. Get proof of payment to suppliers.