The country estate at 9001 Congressional Court in Potomac is listing for $5.2 million. (Courtesy of Marlon Crutchfield)

With the help of Rockville-based multiple-listing service MRIS, we compiled a list of some of the most expensive houses for sale in the Washington area.

The properties range from a palatial $16.5 million mansion with opulent details to a McLean mansion with faux-painted castle walls priced at $3.75 million.

2221 30th St. NW, Washington

$16.5 million

Agent: Nancy Taylor-Bubes, Washington Fine Properties

Built in 2008, this Massachusetts Avenue Heights mansion has extensive custom details, such as ceiling paintings and multi-layered moldings, lavish rooms for entertaining and a splashy marble foyer with a sweeping staircase framed in wrought-iron railings. The home has nine bedrooms, 15 baths, a three-car garage and a gated parking lot with space for more than 10 cars. The grounds have extensive landscaping, a swimming pool and a terrace with a pizza oven.

5430 Beech Ave., Bethesda

$6 million

Agent: Patricia Ammerman, Long & Foster Real Estate

Built in 2013 by Gibson Builders and designed by award-winning GTM Architects, this home sits on a 1.14-acre lot and has six bedrooms and eight baths. Smart house features throughout the home include a security system with five cameras, home automation systems, a generator and multi-zoned heating and air conditioning. The home also has an elevator, a gymnasium with a locker room and steam shower, a three-car heated garage, three fireplaces, 9- and 10-foot-high ceilings, a media room, a spa-like master bathroom and a state-of-the-art kitchen.

1055 Wisconsin Ave. NW #4-W, Washington

$5.3 million

Agent: Mark McFadden, Washington Fine Properties

This more than 3,200-square-foot new penthouse is wrapped in windows with views of Georgetown and the Potomac River. The windows have motorized shades and each room has hardwood flooring. The three-bedroom, four-bath condo has a private terrace and the building has a rooftop swimming pool and a garden, a fitness center and 24-hour staff services. The condo comes with parking for two cars.

9001 Congressional Court, Potomac

$5.2 million

Agents: Maura Shannon and Zelda Heller, TTR Sotheby’s International Realty

This country estate sits on two landscaped acres overlooking Congressional Country Club’s golf course. The main house has seven bedrooms and nine baths. Interior features include six fireplaces, 12-foot-high ceilings, oak floors and a gourmet kitchen with a catering wing. The grounds have a guest cottage built by Studio Z in 2012 with a half basketball court and indoor batting cage as well as a swimming pool, whirlpool tub and a lanai.

10807 Pleasant Hill Drive, Potomac

$4.875 million

Agent: Anne Killeen, Washington Fine Properties

This custom-designed, 11,400-square-foot estate in Potomac sits on more than five acres. The nine-bedroom, 11-bath mansion has high ceilings, plaster walls and large rooms that have been renovated and restored. The kitchen and breakfast room, designed by British interior designer Clive Christian, opens to a two-story family room. The master bedroom also features Clive Christian designs.

824 Whann Ave., McLean

$4.199 million

Agent: Janet Gresh, Keller Williams Realty

Built in 2008, this Langley Forest home has more than 9,200 finished square feet with eight bedrooms and nine bathrooms. The home features high ceilings with crown moldings, crystal chandeliers and ceiling medallions, four fireplaces and an elevator. Many rooms feature floor-to-ceiling windows framing a view of the trees. In addition to the luxurious master suite, the home has a separate in-law or au pair suite and a recreation room with a wet bar and media room. The grounds include 2,500 square feet of tiered outdoor living space, a four-car garage and plans for an infinity pool.

3120 N St. NW, Washington

$4.15 million

Agent: Gary Weiss, TTR Sotheby’s International Realty

This grand Victorian-style home, built approximately in 1900, features a large, south-facing garden and views of the Kennedy Center, Washington’s monuments and the Rosslyn skyline. Located in the heart of Georgetown’s East Village, this home features 10-foot-high ceilings on all floors, detailed moldings, three wood-burning fireplaces, four bedrooms, five baths and garage parking for one car.

5114 Edgemoor Lane, Bethesda

$4 million

Agent: Carolyn Sappenfield and Mark Butterfield, Re/Max Realty Services

Built in 1995, this contemporary-style home features four finished levels with 7,395 square feet of living space including five bedrooms and seven baths. The house has an elevator, a two-story library, a wine cellar, a full in-law suite with a second kitchen and two laundry rooms. The grounds of this more than 13,000-square-foot lot include a private yard, a wraparound patio and a koi pond.

● ● 6914 Blaisdell Rd., Bethesda

$3.85 million

Agent: Wendy Banner, Long & Foster Real Estate

This custom-built home, designed for the builder’s own use, has been completed with attention to every detail. Built in 2008, this home has nearly 14,000 finished square feet with seven bedrooms and 12 baths. The home has an elevator, a whole house generator, six fireplaces and a main-level study. The upper levels have five bedroom suites, each with a private full bath and a finished attic space. The walk-out lower level has a theater, a spa-like bathroom with a sauna, a wine cellar, an exercise room and a recreation room. This home also has a four-car garage.

908 Whann Ave., McLean

$3.75 million

Agent: Lilian Jorgenson, Long & Foster Real Estate

Built in 1998, this Langley Forest mansion has more than 8,600 finished square feet with five bedrooms and eight baths. The focal point for the home is a two-story great room with a stone fireplace and views of a paving stone patio, stone walls, a gazebo and custom-designed landscaping. Faux-painted castle walls lead from the living room to the library, which has cherry built-in cabinets. The kitchen has a morning room and a butler’s station, and the lower level has a recreation room, a media room, a club room with a fireplace and bar, a gym, a wine cellar, a bedroom and a bathroom. The home has a generator and a three-car garage.

Lerner is a freelance writer.