A sure sign of spring — the annual crop of house and garden tours — will be popping up next month in the Washington region.

You can explore a showplace in the District transformed by top local designers. You can admire lush, enchanting gardens across Virginia. And you can view dozens of private homes, farms and historic sites throughout Maryland.

Here is a list of April’s events:

2014 D.C. Design House, 4600 Linnean Ave. NW, April 13 through May 11. See how interior designers transform 29 spaces throughout this estate, which was built in 1929 and has been in the Marshall B. Coyne family for more than 60 years.

Open weekends noon to 5 p.m. and Tuesday through Friday, 10 a.m. to 3 p.m. Closed Mondays. Tickets are $25 and available at www.dcdesignhouse.
and at the door. The event benefits the Children’s National Health System.

Georgetown House Tour, April 26. This annual tour includes nine houses.

Open from 11 a.m. to 5 p.m. Tickets are available for $50 at St. John’s Episcopal Church, 3240 O St. NW, on April 24 and 25, and online before 5 p.m. April 24 at www.
. Tickets are available the day of the tour for $55 at the church. An afternoon tea in Blake Hall at the church is included. The event benefits St. John’s Church and its nonprofit programs.

Historic Garden Week, April 26 through May 3. This multi-tour offering includes 155 private homes and gardens and 61 public sites throughout Virginia.

Produced by the Garden Club of Virginia, the event, established in 1929, is the oldest and largest statewide house and garden tour in the nation. Thirty-one tours take place over eight consecutive days, with 3,300 volunteers involved.

In Northern Virginia, private homes and walled gardens in Old Town Alexandria will be featured April 26; private residences and grounds in Clarke County-Winchester will be open April 26 and 27; grand hunt-country estates will be on view April 27 and 28 in Middleburg; and private homes and gardens in Fairfax County can be toured April 29.

The tickets — which average $30 and $175 for statewide passes — are available at www.vagardenweek.org . The event benefits the restoration and preservation of Virginia’s historic and public gardens, including Mount Vernon and Monticello.

Maryland House & Garden Pilgrimage, April 26 through May 31.

Whether you love history or enjoy touring homes and gardens, the annual Maryland House & Garden Pilgrimage has something for you. A tradition for 77 years, the tour this year includes about 50 private homes, gardens, farms and historic sites in Prince George’s, Baltimore, Talbot, Calvert and Kent counties.

The Prince George’s tour, which takes place April 26, focuses on the War of 1812 and follows part of the Star-Spangled Banner National Historic Trail and Scenic Byway. Among the 15 attractions is Darnall’s Chance, an 18th-century home on the National Register of Historic Places as well as the National Underground Railroad Network to Freedom Trail. During the War of 1812, John Hodges of Darnall’s Chance was asked by local residents to take custody of imprisoned British soldiers and exchange them for U.S. citizens. He was arrested for his actions and tried for treason, but found not guilty. He is the only known person to be tried for treason in the War of 1812.

Advance tickets are $30 at www.
. The event benefits preservation projects in each host community.

Trish Donnally is freelance writer. Freelance writer Michele Lerner contributed to this report.