Home Improvement Contractors in Dover, NH

The median home in the city of Dover was built in 1976, older than the U.S. median of 1980 and older than the New Hampshire median of 1979.¹ Somewhat more of Dover's housing predates 1980 than the national share: 55% against 50%, with 10% built since 2010.¹ Pre-1940 houses often have unlined chimneys, plaster walls and balloon framing, which change the scope of almost every trade. Owner-occupied homes in Dover are newer than rentals: a median build year of 1979 against 1975.¹ With owner-occupied homes skewing newer, many requests are first-time replacements of original builder-grade components.

Dover has a mixed housing stock: 41% detached houses, 7% attached or townhouse units and 32% in buildings of five or more units.¹ Owners and renters are roughly balanced in Dover, with 53% of occupied homes owner-occupied (73% statewide).¹ The median owner-occupied home in Dover is valued at $436,700 (ACS), above the New Hampshire median of $402,500.¹ Home values above the state median tend to support fuller scopes; the written scope should still separate must-do from nice-to-have.

Winters are long: the Durham 2 N station averages 150 nights a year at or below 32°F and 62 at or below 20°F.^2,3 Long winters put freeze-thaw, ice dams and snow load at the center of roofing and masonry decisions. Hot days are uncommon: about 6 days a year reach 90°F.^2,3 Rainfall is substantial: about 48 inches a year, 13 days of it an inch or more.^2,3 Heavy rainfall makes flashing, drainage and ventilation details the difference between a sound assembly and a wet one.

Heating dominates the year: about 6,920 heating degree days against 411 cooling degree days (base 65°F).^2,3 In a heating-led climate, insulation and air sealing carry most of the energy-code weight for any work that opens the envelope. Dover is about 12 miles from the ocean or Gulf coast in a straight line.^4,5 Proximity to salt air makes fastener grade and corrosion protection part of every exterior quote.

Dover sits in IECC climate zone 5A (Cold).⁶ Building permits in Dover are normally issued by the city building department.^7,8