The plan is to demo the single family, and erect the 6 Family, with a total of 7100 sq. ft. of living space, plus two parking spaces on site. 

They are the guys you see working on the large erections of steel at a refinery. 

The rest of the property has all the utilities (water, power, gas, phone, sewer) in place, a road and driveways in place, and everything is close to final grade, from the development side.Viewing data on the county website, there is potential to erect 6 more buildings with 40 more units on this property.

City will not allow development of a home on the lot.Rent space to billboard company - Called 2 billboard companiesNOT ALLOWED - city does not allow any new billboards to be erected inside the city limits.Build multi-bay garage and rent each bay out for car storage NOT ALLOWED - local law prohibits erecting of secondary structures without a primary structure.Rent to seasonal businesses like flower tents, local farmer, etc.

As long as there are no structural issues, that house should remain erect for a good long time.

What ever you do, DO NOT do 10% only venture and DO NOT erect a building for them.

He swiftly razed his new 40,000 acquisition and erected a massive house, installed a giant pool, and threw in a commodious guesthouse that is, for real, bigger than the houses on either side of him.

(1) "Contractor" includes any person, firm, corporation, or other entity who or which, in the pursuit of an independent business undertakes to, or offers to undertake, or submits a bid to, construct, alter, repair, add to, subtract from, improve, develop, move, wreck, or demolish any building, highway, road, railroad, excavation or other structure, project, development, or improvement attached to real estate or to do any part thereof including the installation of carpeting or other floor covering, the erection of scaffolding or other structures or works in connection therewith, the installation or repair of roofing or siding, performing tree removal services, or cabinet or similar installation; or, who, to do similar work upon his or her own property, employs members of more than one trade upon a single job or project or under a single building permit except as otherwise provided in this chapter.

His contractor told him that they could erect a temporary wall, knock down the bad material and rebuild it.

There have been thousands of Passivhaus multi-unit buildings erected in Europe and a {scant} few in North America (none in the Maritimes), so the idea and the building techniques have been proved.