Connecticut has some of the oldest housing in the country: about two in five homes were built before 1960, so plaster-and-lath walls, stone or poured concrete foundations and older wiring are common. Newer suburban houses are wood-frame with drywall, while condos and apartments in Stamford, Hartford, New Haven and Bridgeport use concrete or metal-stud construction.

median year homes were built: 1967; median year homes were built
built in 2000 or later: 12.8%; built in 2000 or later
built before 1960: 40.5%; built before 1960
single-family homes: 65%; single-family homes
in buildings with 5+ units: 19.2%; in buildings with 5+ units
mobile homes: 0.7%; mobile homes

Source: U.S. Census Bureau, ACS 2024 1-year (tables B25035, B25034, B25024)

Common wall types

Plaster over wood lath

Where: Colonials, Capes and triple-deckers from before 1950 in New Haven, Hartford, Waterbury and shoreline towns.

Mounting: Plaster can crack or crumble. Find studs, pre-drill slowly, and use toggle bolts only where framing is not available.

Wood-frame walls with drywall

Where: Post-war and newer houses throughout Fairfield, New Haven and Hartford counties.

Mounting: Studs at 16 inches on center; lag the mount into studs.

Stone and poured concrete foundations

Where: Basements in older and newer homes; fieldstone in many colonial houses.

Mounting: Anchor into concrete with a hammer drill and masonry anchors. Fieldstone is uneven and often not suitable for mounts.

Brick and masonry walls and fireplaces

Where: Older mill towns and urban rowhouses, and many fireplaces.

Mounting: Use masonry anchors in solid brick, avoiding mortar joints. Chimney breasts may be hollow or irregular.

Concrete and metal-stud condos

Where: Stamford, Norwalk, Hartford and New Haven mid- and high-rises.

Mounting: Use hammer drill and anchors for concrete, toggles for metal studs, and follow association rules.

Tips before you mount

Stud walls: studs are usually 16" on center. Lag the mount into at least two studs with 5/16" lag bolts, typically about 2.5" to 3" long. A full-motion arm puts much more leverage on the wall than a flat mount, so it needs studs or masonry and should never hang on drywall anchors alone.
Plaster-and-lath walls: locate studs with a stud finder, pre-drill without hammer mode, and use toggle bolts or have the installer add blocking where framing does not line up. Fixed or tilting mounts are safer than long arms on old plaster.
Metal studs (common in apartments and condos): use snap toggles or toggle bolts rated for the TV and mount weight, or have the installer add wood blocking behind the drywall.
Basement and foundation walls: use 1/4" concrete screws or 3/8" sleeve or wedge anchors with a hammer drill in solid poured concrete or block face shells. Do not anchor into fieldstone or crumbling mortar.
Brick fireplaces and chimney breasts: use masonry anchors in solid brick; check the TV maker heat limits and avoid mounting directly above an active wood fireplace without a heat shield and a deep mantel.
Hiding wires: NEC 400.12 does not allow a regular TV power cord to be concealed inside a wall. Use an in-wall rated recessed power kit, and use CL2 or CL3 rated low-voltage cable for in-wall HDMI and speaker runs. In old houses, ask an electrician to check existing wiring and circuits before adding in-wall power for a media wall.
Porches, decks and outdoor spaces: cold winters and freeze-thaw cycles require outdoor-rated TVs with a rated temperature range, stainless-steel hardware and weather-sealed connections. Coastal towns need extra corrosion resistance.
Condos and co-ops: ask the association whether drilling into concrete or demising walls needs approval, and get the installer certificate of insurance (COI). Before work starts, tell the installer the wall type (studs, masonry, plaster or concrete), the TV size and weight, and the mount type. These change the anchors, labor time and price.

Sources: Census Reporter, ACS 2024 1-year: Connecticut (B25035, B25034, B25024) · Wikipedia: Plaster House (stone and stucco residential construction in Southbury, Connecticut) · Wikipedia: List of the oldest buildings in Connecticut · Groundworks: Connecticut foundation and home construction notes. General guidance only — your installer will confirm the right method for your wall.