Washington International Associates, a joint venture between Thomas Circle Improvement Associates and Hilton International Co., has recently secured a $35 million construction and permanent financing loan from Equitable Life Assurance Society for the new Vista International-Washington, being built near 15th and M streets NW, adjacent to the Madison Hotel. First National Bank of Chicago is participating in the construction loan with $7.5 million.

The 14-story hotel will house more than 400 guest rooms situated around a central atrium containing a bar and conference rooms.

Another major loan, of $21.5 million, was recently committed by New York Life Insurance Co. to 14th & H Street Associates, a Massachusetts limited partnership with Robert C. Elder Associates as general partner, for the construction of one office building and the renovation of another.

The structures, a proposed 11-story building with underground parking, and an existing 12-story building, will be joined on the property at 1331 H St. NW. The two buildings will provide more than 259,000 square feet of rentable space when completed in late 1982.

* Construction has begun on a 50,000-square-foot, 10-story office building being developed by Savage/Fogarty Cos. Inc. at 801 18th St. NW. Paralyzed Veterans of America (PVA) will move its national headquarters from Bethesda into the new building when completed, in late 1982. Weihe, Black, Jeffries, Strassman and Dove, a local architectural firm, designed the building to be economical, yet fully accessible to the handicapped. Tiber Construction, an affiliate of Charles H. Tompkins Co., is general contractor for the project. Some sublease space will be available.

* Julien J. Studley Inc.'s suburban Washington office has made recent leasing transactions valued at $2.3 million. Protas, Kay, Spivak & Protas, a Maryland law firm, leased 9,300 square feet, and realtors Lewis & Silverman Inc. leased 2,200 square feet, both at 6001 Montrose Road, Rockville. General Motors Acceptance Corp. leased 5,750 square feet at 6101 Executive Boulevard in Rockville. Renting 1,400 square feet at 1725 Jefferson Davis Highway in Arlington was National Dynamic Science Inc.

* The Braedon Companies have been named exclusive management and leasing agents for the Walker Building, a 77,000-square-foot office complex at 734 15th St. NW.