How Much Should a Window and Siding Business Spend on Marketing

Why window and siding marketing costs more than a typical trade

A whole-home window replacement or siding job is not an impulse buy. It runs five figures, it disrupts the house for days, and it is the kind of purchase a homeowner researches for weeks before they let anyone climb a ladder. That changes the math on marketing spend compared to, say, a drain cleaning company where the buyer picks whoever answers the phone first.

Long consideration windows mean a homeowner touches your brand multiple times before they call: they see you in a Google search for "energy efficient windows," they check your reviews, they compare your site against two or three competitors, and only then do they request a quote. Every one of those touches costs something, and if your marketing only optimizes for the first click, you are paying to lose the later ones to whoever built a better comparison page.

The other cost driver is bid size. A shared internet lead that costs $60 might be a fine deal for a $300 service call. For an $18,000 siding job, that same $60 lead is cheap only if it converts, and shared leads (the same homeowner request sold to four or five companies) convert at a fraction of the rate of an exclusive lead from your own site or ad. Cheap leads that do not close are not actually cheap. Run the math on your own close rate and it usually settles the argument fast: a $200 exclusive lead that closes one in four beats a $60 shared lead that closes one in fifteen.

Financing adds another layer most trades don't deal with. A homeowner comparing a $22,000 window job is also comparing monthly payment options, and if your site doesn't show financing terms clearly, that comparison happens on a competitor's page instead of yours. That's a content problem money has to solve, not a bidding problem.

Because of this, window and siding companies tend to need a heavier front-loaded investment in the assets that do the comparing for you: pages that show R-values, financing options, and warranty terms clearly enough that a homeowner arrives at the estimate already leaning toward yes. That is a content and site-structure cost, not just an ad-spend cost, and it is why the budget conversation for this trade looks different from a same-day-service trade.

What percentage of revenue should you budget

There is no single right number, but there are sane ranges depending on where your business is:

These ranges hold across most home-service trades, but window and siding companies tend to sit at the higher end of each band because of the bid-comparison behavior above. You are not just generating a lead, you are pre-selling a five-figure decision, and that takes more page real estate, more proof, and more retargeting than a lower-ticket trade needs.

Run the math against your actual revenue, not your goal revenue. If you did $1.4M last year, budget off that number, not the $2M you hope to hit. As jobs close and revenue grows, the dollar amount grows with it even if the percentage holds steady, which is exactly the compounding effect you want: more revenue funding more visibility funding more revenue.

Crew capacity matters as much as revenue here. A company that just added a second install crew has empty calendar slots that cost money whether they're filled or not, which pushes the case toward the higher end of the range until demand catches up to capacity. A company running at full capacity with a backlog doesn't need to chase more leads, it needs to protect its rankings so the backlog doesn't dry up when the market shifts.

One guardrail: do not cut marketing the moment a slow month hits. Window and siding demand is seasonal (more on that below), and a slow month is often the exact month you need the pipeline you built three months earlier to pay off. Cutting spend in a lull starves the next season's leads, and clawing rankings back after a gap almost always costs more than holding them would have.

How the budget splits between SEO, ads, and the website itself

Treat this as three connected pieces, not three competing line items.

• SEO and content (ongoing, roughly 30-40% of budget): This builds and holds your organic map pack and search rankings for terms like "window replacement [city]" and "siding contractor near me." It is the slowest-building and most durable channel: rankings for competitive terms typically take 4-9 months to establish, but once you hold them, the cost per lead drops steadily because you are not paying per click. This bucket also covers the content that answers comparison questions before the estimate call, R-value explainers, material comparisons, financing pages, which is the work that turns a browsing homeowner into a booked appointment.
• Paid search (flexible, roughly 30-45% of budget, seasonally weighted): Google Ads fills the gap while SEO matures and gives you a lever to pull harder in your peak windows. Unlike SEO, you can turn this up in February for energy-efficiency search volume and again in April for curb-appeal season, then pull back in the dead months. Ads are also where retargeting lives, which matters more for this trade than most: a homeowner who visited your site once during a three-week research window is worth showing up in front of again before they land on a competitor's estimate.
• Website and conversion assets (mostly one-time plus quarterly refresh, roughly 20-25% of budget in year one, less after): This is the site itself: the pages that let a homeowner compare R-values, see financing terms, and request a quote without waiting on a callback. A site that loads in under 2 seconds and pre-qualifies visitors before the estimate call converts the traffic the other two channels are paying to bring in.

The mistake we see most often in this trade is spending heavily on ads while sending that traffic to a generic site that reads like it was written for a plumber. Fast, friendly service copy does not answer the question a window buyer actually has, which is usually about efficiency ratings, installation disruption, or financing. If the site does not answer that, the ad spend is subsidizing someone else's better-built comparison page, because the homeowner leaves to go find the answer elsewhere and books with whoever gave it to them.

Seasonal spend: winter energy searches vs. spring curb-appeal searches

Window and siding demand is not flat across the year, and a flat monthly ad budget wastes money in both directions. Homeowners search energy-efficiency terms ("drafty windows," "energy efficient replacement windows," "insulated siding") heaviest in the cold months when a high heating bill or a cold draft makes the problem obvious. Curb-appeal and full-exterior searches ("siding replacement," "vinyl siding colors," "home exterior renovation") pick up heaviest in spring, when homeowners are planning projects to enjoy through summer and listing photos matter again for anyone selling that year.

Between those two windows, search volume and buyer urgency both drop. That does not mean the phone should go silent. It means the budget allocation should shift, not shrink to zero.

• Winter (energy season): Weight paid search toward efficiency and utility-bill messaging. This is also the best window to push content that ranks for energy-rebate and R-value questions, since competition for that intent is lower than for generic "window replacement" terms, and rankings you build here often carry weight into the following winter as well.
• Spring (curb-appeal season): Weight paid search toward visual and exterior-transformation terms. Increase budget here if your capacity allows, since this is typically the highest-volume window of the year for both windows and siding, and competitors ramp their spend here too, which raises the cost of standing still.
• Shoulder months (late summer, early fall): Hold steady on SEO and reduce paid search intensity rather than cutting it off completely. Some homeowners are planning ahead for winter energy problems or spring curb projects, and staying visible costs less than re-earning visibility later. This is also a smart window to catch up on content and site work while ad competition (and cost per click) is lower.

A rigid, evenly-split monthly budget ignores this pattern entirely and typically overspends in the dead months while underspending in peak season. Build the seasonal curve into the plan up front rather than reacting to it after the fact, and check your booking calendar against last year's seasonal pattern before you set next year's monthly splits.

What a real monthly budget looks like at different revenue levels

These are illustrative ranges to plan against, not a quote. Actual numbers depend on your market's competitiveness and how far behind (or ahead) your current online presence already is.

Notice the website line is not a recurring monthly cost at the same weight every month. A rebuilt site is front-loaded (design, R-value and financing pages, review integration, load-speed work) and then drops to a lighter quarterly-refresh cost once it is built and converting. Companies that keep paying full website-build rates every month are usually paying for churn, not improvement.

If a marketing bill lands well below these ranges, ask what is being cut. Below roughly 5% of revenue in a competitive window and siding market, it is common to see either shared leads standing in for real SEO, or a site that was built once years ago and never touched again while the competition's sites got faster and more specific.

The reverse problem shows up too: a company spending 15-20% of revenue on marketing indefinitely, well past the pipeline-building phase, is usually funding an inefficient ad account rather than a growing one. Once organic rankings are established and holding, that percentage should trend down as SEO does more of the work that ads used to carry. If your spend has stayed flat or crept up for two years straight with no shift toward organic doing more of the lifting, that is worth a hard look at where the dollars are actually going.

How to evaluate a marketing agency's proposed budget

If you're comparing proposals right now, the total dollar figure tells you less than the breakdown behind it. A proposal that bundles everything into one "marketing package" number without separating SEO, ads, and site work makes it hard to know what you're actually paying for, or to catch it when one channel is quietly starved to pad the margin on another.

Ask for the split, in writing: how much goes to media spend (what Google actually keeps for the clicks), how much goes to management, and how much goes to content and site work. In a healthy proposal, media spend for paid search should be the majority of the ad line, not a minority of it. If a $5,000/month ad budget shows $3,800 going to management and $1,200 actually reaching Google, that account is under-fueled no matter how good the strategy behind it is.

Second, ask how the proposal treats seasonality. A generalist agency that proposes an even monthly spend across twelve months either hasn't thought about your two demand seasons or is treating you like a trade with flat year-round demand. Either way, it's a sign they haven't built the plan around window and siding buying patterns specifically.

• Ask what a lead costs and what a lead is. Some agencies count a form fill as a lead even if the phone number is fake or the homeowner never answers a follow-up call. Ask for the definition before comparing cost-per-lead figures across proposals.
• Ask how rankings are reported. "We're working on SEO" is not a report. Ask for the actual keyword positions being tracked and how often they're checked against your top competitors' pages.
• Ask what happens to the website if you leave. Some agencies build sites on locked platforms you can't take with you. A site should be yours to keep, host, and edit, not a hook the agency holds over the relationship.

A proposal that survives these questions with clear, specific answers is worth taking seriously regardless of whether it's the cheapest one on the table. A proposal that gets vague under these questions is telling you something about how the budget will actually get spent.

Signs your current spend is wrong for your trade

A few patterns show up often enough in this trade to call out directly.

• You're paying for shared leads and calling it marketing. A lead sold to five companies at once forces you into a price race on a job that should be won on trust and specificity. If more than a small slice of your budget goes to lead resellers, that spend is competing against your own SEO instead of building it, and it's rarely visible as a line item labeled "the thing that's holding us back."
• Your site reads generic. If a homeowner can't tell your window and siding pages apart from a roofing or gutter company's pages, the copy was written by a generalist agency that treats every trade the same. Energy-efficiency and curb-appeal buyers are comparing R-values and financing, not reading "fast, friendly service."
• Your ad spend is flat all year. A budget that doesn't flex between winter energy searches and spring curb-appeal searches is either overpaying in slow months or underpowered in peak ones, and it usually means nobody has looked at the account's own historical data to set the curve.
• You can't say what a lead costs by season. If cost-per-lead and cost-per-job aren't tracked separately for winter versus spring campaigns, there's no way to know which season is actually funding the business and which is burning budget.
• The website hasn't changed in years. Load speed, financing details, and even material options drift out of date. A site that was competitive three years ago is often the slowest page in the local map pack today, and slow pages lose both rankings and homeowners who won't wait for it to load.

None of these mean the whole budget is wrong, but each one is a lever worth pulling before increasing total spend. Fixing a leaky bucket is cheaper than pouring more water into it.