A house that sold for $56 million tops the list of the most expensive residential real estate sales in Boulder in the past week.

The area saw a total of 72 residential real estate sales during the past week, averaging $2 million. The average price per square foot was $566.

The prices in the list below include real estate sales where the title was recorded during the week of Oct. 13 even if the property may have been sold earlier.

10. $2.1 million, single-family home at 1836 Mapleton Ave.

A sale has been finalized for a single-family residence at 1836 Mapleton Ave. in Boulder. The price was $2,100,000. The house was built in 1910 and the living area totals 1,370 square feet. The price per square foot ended up at $1,533. The house features 2 bedrooms and 2 bathrooms.

9. $2.2 million, detached house at 2237 Fourth Street

The single-family house at 2237 Fourth Street in Boulder has new owners. The price was $2,180,000. The house was built in 2003 and has a living area of 2,863 square feet. The price per square foot was $761. The house features 3 bedrooms and 6 bathrooms.

8. $2.5 million, single-family home at 1430 Balsam Ave.

A 3,235-square-foot detached house at 1430 Balsam Ave. in Boulder, has been sold. The total purchase price was $2,533,500, $783 per square foot. The house was built in 2000. The house features 5 bedrooms and 4 bathrooms.

7. $2.7 million, single-family residence at 1570 Poplar Ave.

The sale of the single-family house at 1570 Poplar Ave. in Boulder has been finalized. The price was $2,700,000. It was built in 2005 and has a living area of 2,190 square feet. The price per square foot was $1,233. The house features 3 bedrooms and 2 bathrooms.

6. $2.7 million, single-family residence at 3890 Norwood Court

The property at 3890 Norwood Court in Boulder has new owners. The price was $2,725,000. The single-family house was built in 1982 and has a living area of 4,537 square feet. The price per square foot was $601. The house features 5 bedrooms and 5 bathrooms.

5. $3.1 million, duplex at 2491 Colorado Ave.

A 1,928-square-foot duplex at 2491 Colorado Ave. in Boulder has been sold. The price was $3,125,000, $1,621 per square foot. The house was built in 1925. The house features 4 bedrooms and 2 bathrooms.

4. $3.5 million, detached house at 7155 Rustic Trail

A single-family house at 7155 Rustic Trail in Boulder, has been sold. The price was $3,500,000. The house was built in 1972 and has a living area of 4,620 square feet. The price per square foot was $758. The house features 4 bedrooms and 4 bathrooms.

3. $4.6 million, single-family home at 720 Mapleton Ave.

A 3,786-square-foot single-family home at 720 Mapleton Ave. in Boulder has been sold. The price was $4,587,500, $1,212 per square foot. The house was built in 1904. The house features 5 bedrooms and 6 bathrooms.

2. $5 million, single-family house at 334 Wild Horse Circle

The sale of the single-family residence at 334 Wild Horse Circle in Boulder has been finalized. The price was $4,995,000. It was built in 2008 and has a living area of 2,338 square feet. The price per square foot was $2,136. The house features 3 bedrooms and 3 bathrooms.

1. $56 million, multi family at 3100 34th Street

The multi family at 3100 34th Street in Boulder has new owners. The price was $56,000,000. The house was built in 1971 and has a living area of 132,845 square feet. The price per square foot was $422. The house features 231 bedrooms and 232 bathrooms.