How much does SEO cost for a plumber, according to the surveys?
Three industry surveys publish SEO prices, and they disagree, because they asked different people. None of them is about plumbers. All three are about the people selling SEO, which is still the best public read on the market.
Ahrefs polled 439 SEO providers (article last updated August 2024). The average monthly retainer was $2,917. Local SEO came in lower, at $1,557 a month on average. The single most popular retainer band was $501–$1,000 a month. Looking only at U.S. and Canada providers, 79.1% charge at least $1,001 a month.
SE Ranking surveyed 260 agencies (published December 2024), and 94% of them focus on small or local businesses. In that group, 64% offer monthly retainers below $1,000.
Backlinko surveyed over 300 SEO professionals (page updated December 2025) and puts the average monthly cost at $1,000–$2,500, with hourly rates usually $50–$100 and project work generally $1,000–$5,000. It also says U.S.-based services cost 3–5 times more than those from emerging markets.
Read together: a small local business is mostly quoted somewhere between $500 and $2,500 a month, and where a provider sits, who does the work and what they deliver explains most of the spread.
What do San Diego and contractor SEO providers publish?
Surveys are averages. Price pages are offers. We read ten of them on October 3, 2026: shops with San Diego SEO pages, national contractor and plumber specialists, and one software company that also sells a managed service. Where a page gave no number, we left it out. "Based" is where each site says it is.