The Webb/Sequoia Venture 100, a newly formed partnership, has begun tearing down the Washington-Lee Shopping Center in Arlington to allow construction to start on Sequoia Plaza, a $63 million corporate office park.

Five contemporary-style reflective-glass buildings, each four or five stories high and between 58,000 and 160,000 square feet, are planned for the site at the corner of Rte. 50 and Washington Boulevard. A parking garage, central park and plaza will bring the size of Sequoia Plaza to 380,000 square feet.

The principals of Webb/Sequoia Venture 100 are Sequoia Building Corp. of Fairfax, Webb Cos. of Lexington, Ky., and Investment Group Capital Corp. of Washington.

Charles D. Lovett of Carey Winston Co. in Bethesda acted as broker, and David Habib of WZMH Group Inc. in Dallas has been named architect. Occupancy is expected to begin by next fall.

Other recent developments in commercial realty in the Washington metropolitan area:

Spaulding and Slye announced the following leasing transactions at Tysons Executive Plaza, 2000 Corporate Ridge Rd., McLean: Capital Expansion Group Inc. signed a five-year lease for 7,098 square feet; Compaq Computer Corp. signed a five-year lease for 10,578 square feet; Transamerica Occidental Life Insurance Co. signed a five-year lease for 6,767 square feet; and Venable, Baetjer & Howard signed a five-year lease for 7,285 square feet