We are dealing with a GC proposed lumpsum contract on single family home remodel and expansion. Of course as homeowners we have wish list, our GC keeps executing our Wishlist without confirming the cost and later send huge add services. Our Contract clearly says they cannot enforce change orders on us unless approved in writing. We are being threaten for litigation and liens. Additional they did math error on calculating lumpsum amount and we are not being asked to pay more. We never received line item breakdown for each task, rather a milestone payment plan. We are having hard time defining what we owe them, we have requested a finite amount multiple times. All of these issue surfaced only towards the end of the project,