Add a Unit to the Side and Convert

In this case study home, the existing driveway is large enough to accommodate a side addition to the existing bungalow. Excavating down to the existing foundation level to avoid underpinning also makes it possible to divide the basement to divide the basement into two units and provide sunken courtyards to bring more light and air to the basement.

Design Specifications

# of Units: 1

Ground Floor Area = 117.9 sqm
Basement Floor Area = 117.1 sqm
3 Bed / 1 Bath
235.0 sqm

# of Units: 2

Unit 1 – Ground Floor Front & Side
2 Bed / 1 Bath
64.1 sqm

Unit 2 – Ground Floor Rear & Side
2 Bed / 1 Bath
77.0 sqm

Unit 3 – Basement & Side
2 Bed / 1 Bath
73.6 sqm

Unit 4 – Basement
1 Bed / 1 Bath
53.5 sqm

Cost Considerations

*This sample design might cost somewhere in the range of $540,000 - $1,092,000

Whenever you are deciding what type of unit to add, it is important to understand what the major cost considerations are. For a side addition and conversion project, these are:

Unit Egress
Fire and Sound Separation
New Bathroom(s)
New Kitchen(s)
Site Work
New Construction