Inside, there is 950 square feet of space per floor.

A telephone system with a capacity of 200 lines per floor was added.

The house was built as two rooms per floor, with a central chimney.

Together, the cost of land and construction amounted to about $3 million, or $250,000 per floor.

The addition is to be 78,000 square feet, with 16 condo units per floor, he said.

And because the building is only about 50 feet wide, there are no more than three apartments per floor.

There is one lounge per floor for social and study space.

The units, which are stacked in two groups of three with a common front door at the center, have 3,000 square feet per floor.

Laurie lived in a building on 19th Street that had two apartments per floor.

In hindsight, the best design would have provided two units per floor instead of four.