In Carl A.S. Coan Jr. resigned this week as legislative counsel and staff vice president of the National Association of Home Builders to go into private law practice and do some housing legislation consultancy work. Earlier, Burton C. Wood resigned as deputy legislative counsel to take the top legislative liaison post with the Mortgage Bankers Association. Meanwhile, Dennis O'Toole, appointed deputy legislative counsel to replace Wood, has also been named acting top legislative counsel.

Additionally, vice president Stanley Baitz will leave the top public affairs post at NAHB in July after several decades on the staff. In October, Albert Manola will retire as editor of the monthly Journal-Scope magazine.

But Baitz and Manola, who are retiring at the usual mid-60s age, are mere yougers compared to John and Florence (Pat) Bittner, who soon will be leaving NAHB and the National Housing Center after long careers. A youngish 79 and with almost all of his still-dark hair, John Bittner has served graciously as functions manager. His wife has been manager of office services. In a quiet way, both have participated in many conventions and meetings. Now they plan to do some traveling and work around their house in Silver Spring.

Nothing like an advertisement for a "glider" swing to bring on nostalgia twinges - expect that now they cost nearly $80. There was a time in the 1930s when they replaced those old porch swings, the kind with chain links connecting them to the underside of the porch roof. But those were days when houses had front porches and people actually sat on them during the summer months. With air conditioning, the front porch has gone the way of the ice box and the coal bin. Now some older and some new luxury homes have screened back or side porches where people may relax in the open air. Well, the hammock came back a few years ago. So why not the glider?

When the commercial leasing and sales awards of the Washington Board of Realtors were made last week, 87-year-old Sol Wolberg of Shannon & Luchs walked off with a special plaque. Patricia Terry of the Julien Studley firm had two citations and Steve Goldstein of the same firm was tops in leasing volume. Winfield Weitzel of Weaver Bros. was cited for industrial leasing and Harry Faller of Cafritz for renewals.

There could be a new office building in the future for the corner of 13th and E NW, now occupied by Loew's Theater and a parking lot. At any rate, Quadrangle Corp. has a contract to buy the site and is making a feasibility study . . . . And the listing of recorded recent property transfers shows that columnist-realtor Jeane Dixon recently acquired an office building at 1310 19th St. NW for $190,000 from A. Reifsneider.

In Georgetown, Brooke Lee Jr. sold a big house at 3401 N St. NW for $225,000 in "as-is condition." He paid $106,000 for it 10 years ago. . . . Developer Oliver T. Carr Jr., who recently completed two large office building and high-rise condominium complex in the southern segment of the West End, recently acquired at Spring Valley residence at 4935 Quebec St. NW for $185,000 from F. E. Evans . . . And A. B. Roosevelt Jr. sold a residence at 3122 N St. NW for $267,500 to Milton Schneiderman. Roosevelt subsequently bought a property at 3400 R St. NW for $250,000 from columnist Joseph Kraft.

The Victorian but recently dilapidated Analoston residential building in the 1700 block of Corcoran Street NW has been acquired by Holland & Lyons, a real estate firm that has been active in condominium conversions.