A 20,000-square-foot estate within the Royal Oaks Country Club tops December’s list of the 10 most expensive homes sold in greater Houston.

Note that list prices may differ from actual sales prices.

1. Undisclosed address, Houston
List price $9,999,999
Listed by Diane Kingshill and Jason Lee Villarreal of Martha Turner Sotheby’s International Realty
Sold by David Cole of First Class Realtors

2. 2131 Brentwood Drive, Houston
List price $6,750,000
Listed by Kiki Wilson of Martha Turner Sotheby’s International Realty
Sold by Michele Scheffer of Greenwood King Properties

3. 11706 Flintwood Drive, Houston
List price $6,375,000
Listed by Courtney Robertson of Compass RE Texas
Sold by Laura Mayer of Martha Turner Sotheby’s International Realty

4. 501 W. Friar Tuck Lane, Houston
List price $7,000,000
Listed by Laura Mayer of Martha Turner Sotheby’s International Realty
Sold by Holly Minter and Kellie Geitner of Martha Turner Sotheby’s International Realty

5. 3747 Chevy Chase Drive, Houston
List price $5,399,000
Listed by Sissy Lappin of Lappin Properties
Sold by William Wheless of Wheless Realty

6. 3301 Georgetown St., West University Place
List price $4,995,000
Listed by Cathy Blum of Greenwood King Properties
Sold by a non-MLS agent

7. 31 Knipp Road, Houston
List price $4,495,000
Listed by Katie Wells of Del Monte Realty
Sold by Thalia Guderyon of Compass RE Texas

8. 5656 San Felipe St. 1502, Houston (condominium)
List price $4,445,000
Listed by Moni Bohnisch of Douglas Elliman Real Estate
Sold by Moni Bohnisch of Douglas Elliman Real Estate

9. 5506 Russett Drive, Houston
List price $4,500,000
Listed by Rickey Chavez of Better Homes and Gardens Real Estate Gary Greene
Sold by Victoria Minton of Martha Turner Sotheby’s International Realty

10. 31 Hollymead Drive, The Woodlands
List price $3,990,000
Listed by Robin Kitzmiller of Compass RE Texas
Sold by Elizabeth Griffin of Clearstone Realty

All listing data obtained from the Houston Association of REALTORS®.