Commercial building

Louis Johnson Building (Pinellas County, Florida)
Louis Mohr Block (Allen County, Indiana)
Louis Schmitt House and Store (Summit County, Ohio)
Louisa Building (Henry County, Iowa)
Louisiana State Bank Building (Orleans Parish, Louisiana)
Louisville Grocery Company Building (Jefferson County, Kentucky)
Loussac--Sogn Building (Anchorage, Alaska)
Louviers Village Club (Douglas County, Colorado)
Lowther Store (Webster County, West Virginia)
Lucas Sullivant Building (Franklin County, Ohio)
Lucca Grill (McLean County, Illinois)
Luckey, Platt & Company Department Store (Dutchess County, New York)
Lucky Dog Diner (Sarasota County, Florida)
Lucy Building (Missoula County, Montana)
Ludington Building (Cook County, Illinois)
Ludlow Cafe (San Bernardino County, California)
Lukens Main Office Building (Chester County, Pennsylvania)
Lumber Exchange Building (Hennepin County, Minnesota)
Lumber Exchange Building (Pacific County, Washington)
Lost downtown commercial building
Lumbermen's Building (Multnomah County, Oregon)
Lumpkin Building (Bosque County, Texas)
Lumsden-Boone Building (Wake County, North Carolina)
Luna Mansion (Valencia County, New Mexico)
Lunn's Tavern (Chester County, Pennsylvania)
Lura Building (Traill County, North Dakota)
Lurvey Motor Court (Greene County, Missouri)
Luther Store (Bristol County, Massachusetts)
Lyceum, The (St. Louis County, Missouri)
Lyman Block (Plymouth County, Massachusetts)
Lynch Building (Duval County, Florida)
Lynn Bank Block (Essex County, Massachusetts)
Lyon Block (Jackson County, Iowa)
Lyon Building (King County, Washington)
M & O Chevrolet Company (Cumberland County, North Carolina)
M and J Nelson Building (Hidalgo County, Texas)
M. G. Newman Building (Vanderburgh County, Indiana)
M. W. Shaw Building (Galveston County, Texas)
M.A. Disbrow and Company Buildings (Douglas County, Nebraska)
M.F. Shafer and Co. Building (Douglas County, Nebraska)
Ma's Coffee Pot Diner (Van Buren County, Michigan)
Macheca Building (Orleans Parish, Louisiana)
Machinery Row (Dane County, Wisconsin)
Mackie Building (Milwaukee County, Wisconsin)
Imposing example of large commercial structure of the 1870's, typical of Milv/aukee's rapid growth and commercial development following the Civil War
Macksville Tavern (Huron County, Ohio)
Maclellan Building (Hamilton County, Tennessee)
Macmillan Building (New York County, New York)
Madame C. J. Walker Building (Marion County, Indiana)
Madden's Tavern (Culpeper County, Virginia)
Madison National Bank (Boone County, West Virginia)
Madisonville Bank (St. Tammany Parish, Louisiana)
Mager Mortgage Building (Oklahoma County, Oklahoma)
Magic Lamp Inn (San Bernardino County, California)
Magill House (De Witt County, Illinois)
Magnolia Building (Dallas County, Texas)
Magnolia Company Filling Station (Washington County, Arkansas)
Magnolia Petroleum Building (Oklahoma County, Oklahoma)
Magruder Building (Champaign County, Ohio)
Maher Building (Indian River County, Florida)
Mahler and Carolina Trust Buildings (Wake County, North Carolina)
Mahone's Tavern (Southampton County, Virginia)
Mahoney Building (Luna County, New Mexico)
Mahoning National Bank Building (Mahoning County, Ohio)
Maid-Rite Sandwich Shop (Sangamon County, Illinois)
Maid-Rite Sandwich Shop (Black Hawk County, Iowa)
Vintage Maid-Rite Franchise Restaurant
Mail Pouch barn - MPB 35-71-02 (Ross County, Ohio)
Mail Pouch barn - MPB 38-63-06 (Washington County, Pennsylvania)
Mail Pouch barn - MPB 48-40-02 (Putnam County, West Virginia)
Main Mall Row (Dutchess County, New York)
Main Office of the New Castle Leather Company (New Castle County, Delaware)
Main Street Arcade (Oklahoma County, Oklahoma)
Main Street Buildings (Clark County, Ohio)
Main Street Diner (Hartford County, Connecticut)
A classic diner built by Master Diners Inc.
Maine Eye and Ear Infirmary (Cumberland County, Maine)
Maine Publicity Bureau Building (Cumberland County, Maine)
Maine Woods Office (Franklin County, Maine)
Maisel's Indian Trading Post (Bernalillo County, New Mexico)
Majestic Building (Marion County, Indiana)
Major's Inn and Gilbert Block (Otsego County, New York)
Makris Midtown Diner (Hartford County, Connecticut)
Mall Building (Knox County, Tennessee)
Mallett, Edmund B., Office Building (Cumberland County, Maine)
Mallon Building (Pulaski County, Indiana)
Maloney's General Store (King County, Washington)
Mancos Opera House (Montezuma County, Colorado)
Mandel Brothers Warehouse Building (Cook County, Illinois)
Mandell and Meyer Building (Pinal County, Arizona)
Manetta Mill Company Store (Chester County, South Carolina)
Old company store now used as a museum in Lando, SC
Mangham State Bank Building (Richland Parish, Louisiana)
Manhattan Building (Ramsey County, Minnesota)
Manhattan Building (Cook County, Illinois)
Manhattan Building (Muskogee County, Oklahoma)
Manhattan Company Building (New York County, New York)
Manhattan Laundry (Washington, District of Columbia)
Manion's General Store (Sullivan County, New York)
Manley--Thompson Ford Agency (Pierce County, Washington)
Manning, Lee and Moore Law Office (Monroe County, Arkansas)
Mansfield Savings Bank (Richland County, Ohio)
Mansfield, Murdock and Co. Store (Beaver County, Utah)
Manti Motor Company Building (Sanpete County, Utah)
Manufacturer's National Bank (Androscoggin County, Maine)
Manufacturers Building (Richmond County, North Carolina)
Marble City State Bank Building (Gunnison County, Colorado)
Marble Rock Bank (Floyd County, Iowa)
Marchiondo Building (Colfax County, New Mexico)
Marcouse Building (Camden County, New Jersey)
Mardot Antique Shop (Hamilton County, Ohio)
Margaret Block (Cascade County, Montana)
Marigold Building (Honolulu County, Hawaii)
Marine National Bank (Cape May County, New Jersey)
Marine Supply and Hardware Complex (Skagit County, Washington)
Markert Block Building (Muskogee County, Oklahoma)
Market Building (Habersham County, Georgia)
Market Hall and Sheds (Charleston County, South Carolina)
Market House (Providence County, Rhode Island)
Markle Banking & Trust Company Building (Luzerne County, Pennsylvania)
Marlborough Building (Broome County, New York)
Marmaduke Building (Jefferson County, Kentucky)
Marott's Shoes Building (Marion County, Indiana)
Marquette Building (Cook County, Illinois)
Marquis Opera House (Scotts Bluff County, Nebraska)
Marschner Building (Galveston County, Texas)
Marsh and Powell Funeral Home (Missoula County, Montana)
Marsh--Place Building (Black Hawk County, Iowa)
Marshall Field and Company Store (Cook County, Illinois)
Marshall Field Company Store (Cook County, Illinois)
Marshall--Wells Company Warehouse No. 2 (Multnomah County, Oregon)
Marshfield Elks Temple (Coos County, Oregon)
Marshfield Sun Printing Plant (Coos County, Oregon)
Marston House (East Feliciana Parish, Louisiana)
Marthasville Hardware Building (Warren County, Missouri)
Martin Building (El Paso County, Texas)
Martindale Chief Diner (Columbia County, New York)
Mary Elizabeth Hospital (Wake County, North Carolina)
Maryland Block (Douglas County, Wisconsin)
Mason, William P., House (Bristol County, Massachusetts)
Masonic Block (Middlesex County, Massachusetts)
Masonic Building (Chouteau County, Montana)
Masonic Building (Kerr County, Texas)
Masonic Lodge (Carter County, Missouri)
Masonic Lodge Building (Washington County, Oklahoma)
Masonic Temple (Hennepin County, Minnesota)
Masonic Temple (Duval County, Florida)
Masonic Temple (Cumberland County, Maine)
Masonic Temple (Alameda County, California)
Masonic Temple (Umatilla County, Oregon)
Masonic Temple Building (Wake County, North Carolina)
Masonic Temple Building (Cleveland County, North Carolina)
Massachusetts Avenue Parking Shops (Washington, District of Columbia)
Massachusetts Block (Douglas County, Wisconsin)
Massie Variety Store (Pike County, Illinois)
Masters Building (Henry County, Iowa)
Mather Building/Franklin & DeHaven Jewelers (Wood County, West Virginia)
Mathey Building (Oconto County, Wisconsin)
Mathias Willis Store House (Edmonson County, Kentucky)
Matson Building and Annex (San Francisco County, California)
Matt's Place Drive-In (Silver Bow County, Montana)
Mattie Midgett Store and House (Dare County, North Carolina)
Maverick Building (Bexar County, Texas)
Max Baumeister Building (Walla Walla County, Washington)
Max Keil Building (New Castle County, Delaware)
Max Keil Building (New Castle County, Delaware)
May and Cooney Dry Goods Company (Madison County, Alabama)
May Company (Cuyahoga County, Ohio)
Mayer Business Block (Yavapai County, Arizona)
Mayer--Bankerob House (Winnebago County, Wisconsin)
Maylie's Restaurant (Orleans Parish, Louisiana)
Maynardville State Bank (Union County, Tennessee)
Mayo Building (Tulsa County, Oklahoma)
Mayo Building (Washington County, Vermont)
Mays General Store (Searcy County, Arkansas)
McAdory Building (Jefferson County, Alabama)
McAlester DX (Pittsburg County, Oklahoma)
McBrayer Building (Okmulgee County, Oklahoma)
McBride--Sims Garage (Utah County, Utah)
McCabe Building (Snohomish County, Washington)
McCain Furniture Store (Boone County, Missouri)
McCammon State Bank Building (Bannock County, Idaho)
McCandless Building (Henry County, Iowa)
McCanna-Hubbell Building (Bernalillo County, New Mexico)
McCarthy Building (Rensselaer County, New York)
McCarthy General Store (Valdez-Cordova Census Area, Alaska)
McClanahan Block (Hardin County, Iowa)
McClellan's General Store (Henry County, Iowa)
McClendon--Abney Hardware Company (Angelina County, Texas)
McClintock Building (Denver County, Colorado)
McClintock Storage Warehouse (San Diego County, California)
McClure House (Fremont County, Colorado)
McClurg Building (Cook County, Illinois)
McConahay Building (Jackson County, Missouri)
McCord--Brady Company (Laramie County, Wyoming)
McCornick Building (Salt Lake County, Utah)