[palmer]

1. A detached single-family home for $600,000.
2. A two-bedroom condominium for $650,000.
3. A three-bedroom townhouse for $800,000.

That's because the 1960's house is a tear-down. The others are newer.

[dennisw]

Where I live the detached houses are 70s to 80s vintage. They are hardly teardowns but they are often priced lower than new construction (the last 10 years) condos and townhomes. So I might like detached with some green grass and trees outside...While others put a premium on new and hassle free. As in the condo association takes care of repairs, grass mowing and so on. To each his own.

[Alberta's Child]

The single-family home was probably built around the 1980s.

What's happening here is that more and more people simply don't want to live in a detached home anymore. Between property taxes and maintenance costs, they've become liabilities instead of assets.