Thought I would update this.
C. CAA/CAM Modern House Tour Listings
Tour I, 27 April 1952
Hamilton Brown, Hunt House, 526 West Friar Tuck Lane (Demolished)
Hamilton Brown, Selig House, 3715 Inverness (Demolished)
Cowell & Neuhaus, Baker House, 3665 Willowick Road (Demolished)
Cowell & Neuhaus, Stude (Stevenson) House, 56 Tiel Way. Sympathetically altered.
Philip Johnson, Menil House, 3363 San Felipe Road
MacKie & Kamrath, Adler House, 24 Tiel Way (Demolished)
Thompson McCleary, McCleary House, 6034 Memorial Drive (Demolished)
Edward Stone, Kempner House, 3688 Willowick Road (Demolished)
Wilson, Morris & Crain, Morris House, 2 Waverly Court
Tour II, 18-19 April 1953
Hamilton Brown, Hudgins House, 501 West Friar Tuck Lane (Demolished)
Hamilton Brown, Hohlt House, 223 Pine Shadows Drive (Demolished)
A. A. Liefeste, Jr., Lefieste House, 403 Blalock Road (Demolished). Address was changed to 3 Dunnam. Additions were done by MacKie & Kamrath.
Smart & Whitehead, Smart House, 318 Pine Shadows Drive (Demolished)
Wilson, Morris & Crain, Buie House, 310 Saddlewood Lane (Demolished)
Tour III, 10-11 April 1954
Joseph Krakower, Davidson House, 2418 Maroneal Boulevard
Paul Laszlo, Herzog House, 2523 Maroneal Boulevard
Lloyd & Morgan, Liese House, 328 Buckingham Drive (Demolished)
Wilson, Morris & Crain, Cramerus House, 250 Pine Hollow Lane
Wilson, Morris & Crain, Lazarus House, 57 Briar Hollow Lane (Demolished)
Tour IV, 2-3 April 1955
Bolton & Barnstone, Hardison House, 233 Merrie Way (Demolished)
Paul Elliott, Crow House, 325 West Friar Tuck Lane (Demolished)
William N. Floyd, Floyd House, 226 Pine Hollow Lane
Lloyd & Morgan, Shimek House, 3760 Willowick Road
George Pierce - Abel B. Pierce, Pierce House, 5211 Greentree Road
Tour V, 14-15 April 1956
Bolton & Barnstone, Gordon House, 2307 Bluebonnet Boulevard
Hamilton Brown, Selig House, 3715 Inverness Drive. Unknown. Current house is traditional. HCAD says 1984, but that's just how far their records go back.
Burdette Keeland, Pryor Apartment, Kipling Apartments II, 2719 Kipling Street. Pretty sure these are gone. There are townhouses on that address.
Robert Wilson, Wilson Apartment, Bettis Apartments, 4311 Bettis Drive. These are still standing, but appear to have been converted into offices/apartments for a religious group.
Tour VI, 13-14 April 1957
Lars Bang, Bendit (Kamin) House, 4111 Drummond Street (Fully restored)
Bolton & Barnstone, Demoustier House, 608 Little John Lane (Demolished)
David Brooks & Edward Brooks, Solomon House, 3615 South Braeswood Boulevard
William R. Jenkins, second Jenkins House, 10911 Willowisp Drive
Lloyd & Morgan, Straus House, 53 Briar Hollow Lane (Demolished)
Tour VII, 12-13 April 1958
Edward Goodwin, Jr., Goodwin House, 3 Leisure Lane (Demolished).
George Pierce - Abel B. Pierce, Carroll House, 2014 Persa Street (address no longer exists, per HCAD)
Swenson & Linnstaedter, Swenson House, 3106 Brazos Street (I believe this was originally a home and studio, but HCAD lists it as a commercial building built in 1950. Must be it).
Wilson, Morris, Crain & Anderson, Kelsey House, 2 Long Bow Lane (Demolished)
Wilson, Morris, Crain & Anderson, Marshall House, 3700 Willowick Road (Demolished)
Tour VIII, 11-12 April 1959
Engberg & White, Engberg House, 24 Still Forest Road
Robert Maurice, Maurice House & Office, 3222 Mercer Street
Neuhaus & Taylor, Erath House, 11206 Tynewood Lane
Neuhaus & Taylor, Genitempo House, 310 Carnarvon Drive (Demolished)
Wilson, Morris, Crain & Anderson, Thompson House, 4911 Tilbury Drive (Demolished)
Tour IX, 21-22 May 1960
Koetter & Tharp, Tharp House, 8218 Mallie Court (Demolished)
Lloyd & Morgan, Class House, Rice University
Lloyd & Morgan, Cooper House, 201 Kincaid Drive (unknown)
Neuhaus & Taylor, Frame House, 403 Westminster Drive
Wilson, Morris, Crain & Anderson, Fulton House, Rice University
Tour X, 6-7 May 1961
Bolton & Barnstone, Lindsay House, 7623 River Point Drive
Travis Broesche, Walser House, 411 Fall River Road (Demolished, was Mod of The Month in 2016).
Hamilton Brown, McClelland House, 11207 Tyne Court (Demolished)
William Hoff, Huvard House, 12526 Old Oaks Drive. I read somewhere that this house was by Jenkins & Hoff, but can't remember where. Either way, this house still stands and in good condition.
George Pierce - Abel B. Pierce, Zwerneman (Lundgren) House, 16 Crestwood Drive (Additional building by Eugene Aubrey; remodeled by Gwathmey Siegal Assoc., once owned by Francois de Menil and featured in one of Gwathmey Siegal's first books, with photos by Richard Payne). The wild colors have been replaced for white, unfortunately. ***As of 2017, there are still parts of this house standing, but it's certain that the overall intent is no longer intact.***
Tour XI, 28-29 April 1962
Bolton & Barnstone, Owsley House, 65 Briar Hollow Drive. Owned by the Bone family, along with the Carter House at 62 Briar Hollow Lane and another house next door attributed to Ralph Anderson/Wilson, Morris, Crain & Anderson.
MacKie & Kamrath, Ballantyne House, 2 Tiel Way (Mostly demolished but apparently going to be rebuilt or something by architect Chris Robertson).
Wilson, Morris, Crain & Anderson, Carter House, 62 Briar Hollow Lane
Wilson, Morris, Crain & Anderson, Hines House, 146 Radney Street (demolished; photos exist in the original Houston Architecture Guide)
Tour XII, 1963
Tour XIII, 5-6 December 1964
Howard Barnstone & Partners, Melcher House, 13 Tiel Way. This house is still there but has been significantly altered in a sort of Mediterranean style.
H. F. P. Goeters & Associates, Salmon House, 506 Fall River Road (demolished)
Jenkins & Hoff, Sheer House, 616 Hedwig Lane (unknown, neighborhood has changed considerably). This one remains one of the bigger mysteries. I'm still not sure what the deal is with this house, whether it's been heavily altered, completely demolished, or is hidden on a wooded lot out of view.
Larson & Wingfield, Williams House, 31 Briar Hollow Lane (demolished)
F. Carrington Weems, Weems House, 919 Kirby Drive
Tour XIV, 30-31 October 1965
Kenneth Bentsen, Bentsen House, 2933 Del Monte Drive (not sure about this one; says constructed in 1935, remodeled in the 2000's, so it must still be there).
P. M. Bolton Associates, Bolton House, 5000 Longmont Drive
J. W. Evans, Evans House, 3118 Georgetown Street
Jenkins & Hoff, Hoff House, 672 Flintdale Road
Wilson, Morris, Crain & Anderson, Anderson House, 1638 Banks Street