The Latest Tax on Home Renovations

If you got a quote for a home project this month that felt higher than you expected, a kitchen remodel, a new roof, a bathroom gut, you're not imagining things. And it's probably not the contractor padding the number.

There's a compounding set of tariffs on construction materials right now that's adding thousands of dollars to home projects across Charleston. Most homeowners have no idea it's happening because the tariff cost doesn't show up as a line item. It's baked into every board, every sheet of metal, every foot of copper pipe. By the time it reaches your quote, it just looks like "the price."

Let's break down what's actually going on, material by material, so you can read your next quote with clearer eyes.

TL;DR

Canadian lumber faces 45% combined duties. Steel, aluminum, and copper face 50% tariffs. The National Association of Home Builders estimates current tariffs add roughly $10,900 to a typical new home. Renovation projects see similar percentage increases across affected materials. Your 10% contingency budget is no longer enough, plan for 15–20%.

Lumber: 45% duties on your framing, decking, and trim

Most of the softwood lumber used in residential construction in the Southeast comes from either domestic mills or Canadian imports. In 2025, the Commerce Department increased antidumping and countervailing duties on Canadian lumber from 14.5% to 35%. Then a Section 232 tariff added another 10% on all timber and lumber imports.

That's a combined 45% duty on Canadian softwood lumber.

As of mid-April 2026, lumber futures have dropped toward $580 per thousand board feet, hitting a one-month low as high interest rates and falling new-construction starts have crushed demand. You'd think that would bring prices down at the lumberyard. It hasn't — at least not yet.

Framing lumber costs hit $916.62/MBF in Q2 2026, up 5.11% from last quarter. Why? Because even as demand softens, ongoing sawmill closures have removed 1.3 billion board feet of capacity from the supply side. Less supply plus tariff-inflated import costs equals higher delivered prices, even when the futures market is falling.

For a typical Charleston renovation that involves framing. Say a room addition, garage conversion, or significant structural work, lumber is 15–20% of your materials cost. A 45% tariff on the imported share of that lumber can add $2,000–$5,000 to the project depending on scope.

Steel and aluminum: 50% tariffs hitting your roof, HVAC, and kitchen

Steel and aluminum don't sound like residential materials until you think about what's actually made from them: metal roofing, HVAC ductwork, gutters, flashing, structural connectors, appliances, and cabinet hardware.

The current tariff structure on metals is the steepest in decades. Items made entirely or mostly from steel, aluminum, or copper face a 50% tariff. Derivatives (products that contain substantial amounts of these metals) face 25%. Industrial and electrical equipment containing these metals faces 15%.

What does that look like in your project?

• Metal roofing — a standing-seam metal roof in the Lowcountry, already popular for hurricane resistance and longevity, is seeing approximately 20% increases on base material costs driven directly by tariffs.
• HVAC systems — your condenser, air handler, and ductwork all contain significant aluminum and copper. A full HVAC replacement that quoted $8,000–$12,000 two years ago is now running $10,000–$15,000+ in the Charleston market, with tariffs as a contributing factor alongside the R-454B refrigerant transition.
• Kitchen renovation — a gut kitchen reno touches cabinets, appliances, copper plumbing, steel or aluminum structural work, and lumber for framing, all tariff-affected. The 25% tariff on imported cabinets alone is in effect until at least January 2027.

Copper: the quiet one

Copper doesn't get the headline attention that lumber and steel do, but it's in every residential project: wiring, plumbing supply lines, refrigerant lines for HVAC. At a 50% tariff on copper products, every foot of copper pipe and every spool of Romex carries a markup that didn't exist three years ago.

For a whole-house repipe or significant electrical work, the kind of project that older Charleston homes (South of Broad, Wagener Terrace, the older parts of Mount Pleasant) often need, copper costs can represent $3,000–$8,000 of the materials budget. A 50% tariff on that material is not subtle.

How to read a quote in a tariff environment

Most contractors don't break out tariff costs as a separate line item. They can't, really, they buy materials at the delivered price, which already has tariffs baked in. But there are ways to understand what you're looking at.

Ask for a materials-labor split

A good contractor should be able to tell you roughly what percentage of your quote is materials versus labor. If materials are 40–50% of a framing-heavy project, you can assume a meaningful chunk of that is tariff-inflated. This isn't the contractor's fault. It's the cost environment they're buying into.

Compare material-heavy vs. labor-heavy scopes

Tariffs hit material-heavy projects hardest: roofing, siding, HVAC replacement, kitchen remodels, room additions. Labor-heavy projects — painting, landscaping, pressure washing, most plumbing repairs — are less affected by tariffs (though the labor shortage is pushing those costs up separately).

If you're prioritizing projects this spring, know that the tariff premium is not uniform. A deck build (lumber + metal fasteners) is getting hit from two directions. A deep-clean and paint job is mostly labor.

Budget 15–20% contingency, not 10%

The old rule of thumb — set aside 10% for surprises — was already thin for renovations. In the current tariff environment, 15% to 20% is more realistic, especially for projects with heavy exposure to affected materials. Kitchens, bathrooms, and structural work are the highest-risk categories.

Lock materials pricing early

If your contractor is willing to purchase materials early or lock in pricing with a supplier, it can protect you from mid-project increases. Tariff policy can shift — rates can go up, exemptions can expire — and a project that spans three months is exposed to price changes the whole time. Ask about materials procurement timing during the bidding process.

The bigger picture: why this matters beyond your project

These tariffs are part of a broader cost-pressure environment that's reshaping the home services industry. The NAHB estimates an aggregate construction cost increase of roughly 8% under current tariff policy. Brookings research confirms that residential construction faces particular vulnerability because housing relies heavily on the exact materials being tariffed — lumber, steel, aluminum, copper.

Combine that with a construction labor force that needs 349,000 new workers in 2026 just to meet demand and construction wages rising 4%+ year-over-year, and you have a market where costs are being pushed from every direction.

This is exactly why we built THE Home Index — a transparent, monthly composite that tracks these cost pressures using BLS, Census, FHFA, and FRED data so homeowners can see what's actually driving their quotes. When you understand that lumber duties, metal tariffs, and labor shortages are all real and measurable forces, a quote that's 20% higher than 2023 doesn't feel like a contractor taking advantage. It feels like what it is: the actual cost of doing the work in this environment.

That transparency matters. And it's why HomeIndex exists — to give homeowners and contractors a shared, honest view of what things cost and why.

What to do this spring

• Get multiple competitive bids. In a high-cost environment, the spread between quotes matters more than ever. Don't pay a lead-gen premium on top of tariff premiums.
• Ask about material sourcing. Domestic lumber may be cheaper than tariffed imports right now. A contractor who sources strategically can save you money.
• Prioritize by tariff exposure. If budget is tight, start with labor-heavy projects and defer material-heavy ones until the tariff picture clarifies.
• Use your Home Health profile. If you're tracking your systems on HomeIndex, you already know what's urgent vs. what can wait. That data helps you make smart timing decisions.
• Don't assume the contractor is overcharging. The numbers are the numbers. A quote that looks high might just reflect the real cost of Canadian lumber at 45% duty and copper pipe at 50%.

Post your project and get competitive bids from qualified local professionals.

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FAQ

How much are tariffs adding to a typical home project in 2026?

The NAHB estimates roughly $10,900 for a typical new home build. Renovation projects vary by scope — material-heavy projects like roofing, HVAC, and kitchen remodels see the largest increases, potentially adding 8–20% to materials costs depending on the specific materials involved.

Which materials are tariffed the most?

Canadian softwood lumber faces 45% combined duties (antidumping + Section 232). Steel, aluminum, and copper products face 50% tariffs. Imported cabinets face a 25% tariff through at least January 2027.

Will these tariffs go away?

Unknown. Section 232 tariffs are set by executive action and can change. The antidumping duties on Canadian lumber have been in place in various forms for years and are set through administrative review. Planning around current rates is more realistic than hoping for relief.

Should I wait to renovate?

That depends on urgency. If your HVAC is failing or your roof is compromised, waiting introduces risk that outweighs tariff savings. If the project is cosmetic or deferrable, waiting for potential tariff adjustments is reasonable — but there's no guarantee rates will drop.

How can I tell if a contractor's quote reflects real costs or padding?

Get multiple bids through an open marketplace where contractors compete on price. Ask for a materials-labor breakdown. Compare the materials percentage against industry norms (typically 40–50% for material-heavy projects). If all your bids are in a similar range, the market is telling you the real price.