construction costs

North river design build currently delivers completed passive designed flexhouse projects for the following estimated square foot prices, including all site infrastructure and permitting fees. These prices have levelled off recently, after a lot of volatility during the Covid and post-Covid era, so updating this sf cost estimate on our earliest phone call is a good idea.

Model	Estimated SF.	Cost per square foot*
Flexhouse 1	800-1,000	$550
Flexhouse II	1,000-1,600	$525
Flexhouse III	1,600-2,400	$500
Flexhouse IV	2,500-3,200	$475
Custom FH	Custom	$550
Garage PH level	800-1,200	$375
Garage unrated	800-1,200	$275
Shellhouse	FH III only	save 30%
Pre-Fab	FH I and II only	save 35%

*Estimated construction costs per sf include: all site infrastructure for well, in-ground septic, 100’ of gravel driveway, buried electric/data service, and exclude furniture, appliances, and actual ready to install photovoltaic panels, for which varying financing/ownership options exist.