You'll find mostly studios and one-bedrooms for sale this week on a budget of $500,000. As always, expand your search to Queens, the Bronx, and Staten Island to get more space. And a bonus for prewar lovers: Many of the apartments available this week have period charm.

YORKVILLE, MANHATTAN: A studio co-op with a private terrace, parquet floors, and a renovated bath in a pet-friendly elevator building with central laundry at 345 East 81st Street (between First and Second). $500,000 plus $891/month maintenance

UPPER WEST SIDE, MANHATTAN: A prewar one-bedroom co-op that has recently been painted and has crown moldings, tall baseboards, and herringbone floors in a doorman building with an elevator operator and a courtyard at 230 West End Avenue (between West 70th and West 71st). $500,000 plus $1,435/month maintenance, no pets, no pied-a-terres

PARK SLOPE, BROOKLYN: A prewar one-bedroom co-op with built-in shelves in a pet-friendly building with common laundry, storage, and a live-in super a few blocks from Washington Park at 322 Sixth Street (between Fourth and Fifth). $499,000 plus $717/month maintenance

KENSINGTON, BROOKLYN: A two-bedroom, two-bath co-op with a terrace, an open living and dining area, and a foyer in an elevator building with a part-time doorman at 525 Ocean Parkway (between Ditmas and 18th). $500,000 plus $857/month maintenance, no dogs

BEDFORD-STUYVESANT, BROOKLYN: A one-bedroom, two-bath duplex loft condo with a private terrace, office alcove, and updated kitchen in a pet-friendly building at 800 Dekalb Avenue (between Tompkins and Throop). $500,000 plus $331/month common charges, $33/month taxes

BELLEROSE, QUEENS: A three-bedroom, one-bath detached brick Cape with a partially finished basement and a detached one-car garage at 81-29 Commonwealth Boulevard (between 81st and 82nd). $508,000 plus $5,744/month taxes

BAY TERRACE, QUEENS: A one-bedroom condo with views of Little Neck Bay on the 18th floor of a pet-friendly elevator building with an indoor pool, basketball and tennis courts, and indoor parking at One Bay Club Drive (at 23rd). $499,000 plus $529/month common charges, $300/month taxes

RIVERDALE, BRONX: A three-bedroom, two-bath co-op (convertible into a four-bedroom) with a terrace, a windowed kitchen, and a formal dining room in a building with a part-time doorman at 3701 Henry Hudson Parkway (at Independence). $509,000 plus $1,348/month maintenance

WILLOWBROOK, STATEN ISLAND: A four-bedroom, four-bath house with a deck and new siding, doors, heating system, and water heater, plus a separate side entrance on the first floor near Willowbrook Park at 74 Croft Place (at Goller). $499,000

7 questions to ask about the building before you buy an apartment there (sponsored)