Tariff Impact on Construction Costs in 2027

Tariffs are the single biggest wildcard for 2027 construction costs. A temporary broad ~10% import tariff was scheduled to expire on July 24, 2026, and without a well-designed follow-on (Section 301) schedule, contractors could see abrupt changes in producer price levels and in the availability of targeted building materials. Metals — steel and aluminum — carry the most exposure, which flows into framing hardware, windows, appliances and HVAC.

Metal-based products are hit hardest. Steel (beams, rebar) is expected up 4–9% and aluminum-heavy items like windows and doors up 3–8%. Appliances, electrical components, plumbing fixtures and HVAC equipment all carry import exposure of roughly 3–8%. Lumber is a special case — its trajectory depends almost entirely on the post-2026 Canadian softwood schedule.

Not necessarily. The expiration of the temporary tariff could ease some prices, but the replacement schedule matters more than the expiration itself. The industry consensus is that overall construction costs will keep growing modestly in 2027 rather than fall, because labor shortages and metal prices continue to push upward regardless of the exact tariff mix.

A practical approach is to carry a 10–15% contingency weighted toward tariff-exposed items — steel, windows, appliances, electrical and HVAC. Locking material pricing early and using fixed-price contracts with escalation caps are the most effective hedges against sudden mid-project price jumps.