Today’s installment of our popular “Which celebrity’s house is this?” feature involves the four-bedroom house at 8626 Allenwood Road in Los Angeles’ Hollywood Hills, which sold recently for $1,800,000.

The reason we believe that this house, which was designed by Edward Fickett, is owned by a celebrity is because the buyer is shown as being the Allenwood Road Trust. And the money manager behind said trust is Barry Greenfield, who regular readers of this blog know is the uber-celebrity money manager in L.A.; he has represented more celebs over the years in the real estate transactions that they try to make private than just about anyone else!

Built in 1959, the house has three baths, a gourmet kitchen, a formal dining area, a two-story living room with floor-to-ceiling glass, a master suite with a private patio, and three fireplaces, according to public records and listing information. The house measures either 2,994 square feet — according to public records — or 3,500 square feet, according to listing information. The 0.8-acre flag-shaped lot has a pool and is bordered by private park land, according to public records and listing information.

Records show that the house sold on July 31 and was recorded on August 21.

So tell us, dear readers, as we always ask you: which celebrity purchased 8626 Allenwood Road in the Hills? Which bold-faced name is behind the Allenwood Road Trust?

Actor Conrad Bain — known most, of course, for his role as Mr. Drummond on TV’s “Diff’rent Strokes” — has listed his 3,805-square-foot house in Los Angeles’ Brentwood area for $3,175,000.

The Los Angeles Times’ Lauren Beale wrote about the listing earlier this month by the immensely likable, 86-year-old Bain of his longtime post-and-beam-style, three-bedroom house in Brentwood.

Built in 1962, Bain’s custom-built, light-filled house — which he has owned since the 1970s — was designed by architect A. Quincy Jones and has three baths, an expansive living room with a stone fireplace and a high-beamed ceiling, walls of glass, a master suite with two walk-in closets, a granite kitchen with a Sub-Zero refrigerator, a large art studio, an office, and a family room/den, according to public records and listing information. Outdoor features on the 0.5-acre (21,736-square-foot) lot include ocean, city and mountain views; a large fenced garden; a pool; a spa; and patios, according to public records and listing information.

Previously, Bain (shown here with his “Diff’rent Strokes” co-stars Gary Coleman and Todd Bridges) and his wife, Monica, had sold a house they had owned at 171 Ram Island Drive in Shelter Island, N.Y. (on Long Island) in 1996 for $650,000, according to public records.

Beale reported that Bain has relocated to northern California. However, public records do not yet show him having purchased anything there.

Newlyweds Khloe Kardashian and Lamar Odom — he, the basketball star; she, the gal famous only for her last name — reportedly have purchased a large house in the gated Mulholland Park Estates neighborhood in Los Angeles’ Tarzana area that had been on the market for $3,995,000.

TMZ.com broke the story the day before yesterday about the couple’s reported purchase, which we haven’t seen yet in public records. (We don’t normally write about “reported” purchases, since sometimes we later found out that that’s exactly what they are — “reported,” but not actual, in public records. However, TMZ.com usually nails things, and at this point, we have no reason to doubt the purchase.) Radar Online also provided a nice report on the apparent purchase.

The house’s square footage is up for debate. Public records say it’s 7,977 square feet, but TMZ.com and listing information call it 8,347 square feet; either way, the seven-bedroom house, which was built in 2003, should have sufficient room for the couple and any hangers-on.

Features in the house, which has a $42,600-a-year tax bill, include nine baths (five per assessor, but nine per listing information), faux venetian walls, custom draperies, “beautiful wood cabinetry,” a gourmet kitchen, stone floors, a theater, a gym, an office, and an outdoor kitchen with two refrigerators and a barbecue grill, according to listing information. Before the couple purchased the house, its asking price had been reduced by a whopping $1 million, which seems about right to us — particularly since the fellow who sold it to them had purchased it in 2006 for $3,450,000, according to public records.

Outdoor features on the 0.75-acre (32,717-square-foot) lot include covered lounging areas; a hotel-like pool with a spa, waterfall and cabanas; fully landscaped areas; and parking for 15 cars, according to public records and listing information.

We don’t write much about Mulholland Park Estates (please, let’s not confuse this with Mulholland Estates area above Beverly Hills — technically in the Sherman Oaks area of Los Angeles — where so many true celebrities have lived over the years), but the couple won’t be alone, celebrity-wise, in their new precinct. For example, actor Chris Tucker long has owned a two-lot spread nearby that features a 6,399-square-foot house on a 0.72-acre (31,529-square-foot) lot that he purchased in the mid-1990s for $1,113,500 and an adjacent, 6,549-square-foot house on a 0.76-acre (33,053-square-foot) lot that he purchased in 2001 for $2,400,000, according to public records. Tucker was reported by the Los Angeles Times’ Ruth Ryon to have had the first house on the market in 2002 for just under $2.2 million, but he clearly later changed his mind, because it’s still in his portfolio.

The Los Angeles Times’ Lauren Beale recently reported that Odom has listed his longtime bachelor pad in Manhattan Beach, Calif. for $2,399,000. And although Beale — as usual — didn’t mention any history on the house, it’s pretty clear that Odom will end up taking a sizable loss on the 4,181-square-foot Mediterranean-style house, which he purchased in late 2006 for $2,700,000, according to public records. Check out the Times’ former “Hot Property” columnist Ruth Ryon’s 2006 report on when Odom bought the bachelor pad.

Actor Rob Lowe and his makeup artist wife, Sheryl Berkoff, have sold a six-bedroom house in Montecito, Calif. for $7,600,000.

In a Big Time Listings exclusive, we can report on Lowe’s sale of the house and 1.13-acre lot at 735 Fuera Lane in Montecito, which is in Santa Barbara County. Records show that Lowe’s Profile Property Trust sold the house on May 11, with the deal being recorded on May 19. The buyers are not celebrities.

Built in 1929, the house that Lowe sold has five full baths and one half bath, according to listing information. Designed by William McCay, the house has been remodeled and “re-styled,” according to listing information, by Lowe. The house first had been listed for $12,398,000 and later was reduced to $10,995,000.

Records show that Lowe purchased the house in 2005 for an undisclosed amount. The Los Angeles Times’ Ruth Ryon reported in April 2005 that the amount was $6 million, and that the house was purchased as a “temporary house” until Lowe and his wife had finished building their dream house (see more on that below).

Lowe owns other property in Santa Barbara County. Records show that his trust owns the following:

–His principal residence, which is his house on 3.4 acres nearby, which he purchased in 2005 and on which he subsequently built a 9,860-square-foot (or 14,260-square-foot, depending on which plans one consults) house, according to public records. The property has ocean and mountain views, Ryon reported in 2005. That project incurred significant wrath from his neighbors.

–And another small parcel in Santa Barbara that he has owned since purchasing it for an undisclosed price in 2004, according to public records.

Lowe also famously had owned the mansion and 5.56-acre property at 771 Garden Lane in Santa Barbara, which appeared in Architectural Digest in July 2001. He and his wife sold that property to something called the 771 Garden Lane Trust in 2005. Ryon reported in 2005 that the individual behind the 771 Garden Lane Trust was Peter V. Sperling, the son of the founder of the Arizona-based University of Phoenix. She also reported that that property went to escrow for $25 million.

Actor Rupert Grint has found great use for his riches from his role in the fabulously successful “Harry Potter” franchise, sinking his fortune into British real estate.

Grint, 21, now has purchased two country mansions, and also owns a third home — all with no mortgages whatsoever. The Daily Mail recently reported that Grint on September 9 paid 5.4 million pounds to acquire an 18th-century, Hertfordshire manor house on 22 acres. The mansion (top picture) includes five reception rooms and six bedroom suites. Two cottages and a pool dot the grounds, the paper reported.

Grint (shown here with co-star Emma “Hermione Granger” Watson) owns another country house in Hertfordshire, where he has been living up to now with his parents, brother and three sisters. He paid 3.35 million pounds for that mansion (second picture), whose grounds have a lake and a putting green, in October 2006, the Daily Mail reported. As if all that weren’t enough, Grint also paid 495,000 pounds with his father to purchase a good-sized, detached house, also in Hertfordshire, the paper noted.

Grint’s parents have their own real estate as well, the Daily Mail noted, including a farmhouse just outside Hertford that the purchased in October 2003 for 2 million pounds.

Grint’s property portfolio vastly outshines those of his co-stars. The Daily Mail reported that “Harry Potter” himself, Daniel Radcliffe, owns property totaling an estimated 7 million in value (we would definitely question that figure, given the land-baron designs that Radcliffe seems to have), while Watson owns 4 million pounds worth of properties, the paper reported.

Check out Bob’s weekly column from this coming Sunday’s Chicago Tribune — already posted online now — about White House Chief of Staff and Chicago native Rahm Emanuel, who has rented out his house in Chicago’s Lakeview neighborhood for one year for $4,995 per month. Also featured: Nancy Hughes, the widow of iconic 1980s film director John Hughes, who just paid $5,200,000 to purchase a mansion in Lake Forest, Ill.

Check out Bob’s weekly column from Sunday’s Chicago Tribune about two Chicago Bears teammates keeping a house in the team’s family, so to speak, with injured defensive tackle Dusty Dvoracek selling it to Bears rookie wide receiver and first-time homebuyer Juaquin Iglesias for $344,500.

Today’s installment of our popular “Which celebrity’s house is this?” feature involves the 2,052-square-foot, shingled waterfront house at 437 Linnie Canal in Los Angeles’ Venice neighborhood, which sold in September for $1,890,000.

The reason we believe that the house, which had been listed for $1,990,000, has been purchased by a celebrity is because the buyer is shown in public records as being something called the Rowboat Trust. And the money manager whose name is on the deed representing the Rowboat Trust is one Bo Gardner. Frequent and eagle-eyed readers of this blog will know that Gardner also has represented other celebrities over the years in their real-estate transactions, including rocker Flea (Michael Balzary).

Built in 1924, remodeled and expanded in 1999 and known as Casa di Gennaio, the red oak-clad house on Linnie Canal in Venice has French doors, bay windows, rooms opening to a patio or balcony, a courtyard off the kitchen with a plumbed BBQ, oak floors, timbered ceilings, Ralph Lauren Thoroughbred paint, a canal-front great room with a built-in seating area overlooking the canals and a wood/gas fireplace, another great room that can be a second bedroom or studio plus an adjoining office/den, full bath and laundry room, according to public records and listing information. Other features include a gourmet kitchen with stainless steel appliances, granite countertops, a wine cooler, a large walk-in pantry and an adjacent powder room, according to listing information. The second-floor master suite has a reading cove with a fireplace and built-in bookshelves, an oversized walk-in closet, a bath with a spa tub and separate shower and a balcony, according to listing information. Outdoor features on the 0.07-acre (2,850-square-foot) lot, which is four blocks from Venice Beach, include a one-car garage.

Check out an online listing sheet for the house — plus a photo — here.

The sellers are not celebrities.

So, dear readers, we ask you as we always do: which celebrity purchased the house at 437 Linnie Canal? Which bold-faced name is behind the Rowboat Trust?

Former United States Attorney General Alberto Gonzales has placed his five-bedroom, brick Colonial-style house in McLean, Va. on the market for $1,075,000.

Now teaching at Texas Tech University in Lubbock, Tex., Gonzales, 54, was the U.S.’ Attorney General from 2005 until 2007 and prior to that was President George W. Bush’s White House Counsel. The Washington Post’s Reliable Source columnists appear to have broken the story earlier this week of Gonzales’ listing.

Built in 1966, Gonzales’ 2,604-square-foot, center hall Colonial-style house has video-monitored entrances and a safe room off the master bedroom, the Post reported. Other features include four baths, hardwood floors throughout, custom built-ins, a security system, two separate living areas, a fully finished walk-out basement, and a kitchen with granite, a gas range and top-of-the-line cabinetry, according to listing information. Outdoor features on the 0.35-acre (15,334-square-foot) lot include in-ground sprinklers and panoramic views, according to listing information.

Gonzales paid $1,050,000 through a trust (of which Timothy Schwartz is the trustee) to purchase the home in June 2005, according to public records.

Check out Bob’s column (already available online) from this coming Sunday’s Chicago Tribune, breaking the story that chewing-gum heir and Wm. Wrigley, Jr. Co. Chairman Bill Wrigley, Jr. just placed his unfinished Chicago penthouse on the market for $14,000,000, making it Chicago’s highest-priced residential listing. Wrigley also just officially placed his mansion in Lake Forest, Ill. on the market for $14,500,000 after previously having it for sale privately for $16,000,000. Bob also breaks the news that Wrigley paid $11,000,000 in April through an LLC company for a mansion on Lake Worth Lagoon in North Palm Beach, Fla. And, Wrigley paid $11,530,000 through a different LLC company in May for some land in Aspen, Col.

Also featured: former Chicago Bears and current Houston Texans quarterback Rex Grossman reduces the asking price of his 2,437-square-foot, 36th-floor unit in Chicago’s Trump International Hotel & Tower from $2,350,000 to $2,295,000.