Real 2026 pricing from verified Black Diamond-area lawn care contractors — by lot size, cadence, and ZIP code.
Lawn Mowing in Black Diamond, WA typically costs $40–$120 per visit in 2026, depending on property size and job conditions. Most Black Diamond property owners pay the mid-range tier. Get an exact, itemized price for your address in under 60 seconds with an instant Quotly quote.
Black Diamond sits in the southeastern corner of King County, an old coal-mining town turned bedroom community on the way up toward the Cascade foothills and Enumclaw. The newer Ten Trails and Lake Sawyer-area subdivisions bring tidy, mid-size suburban lots, while the older grid around the Black Diamond Historical Museum, Railroad Avenue, and the surrounding rural parcels runs to larger, more irregular yards. That spread is the single biggest reason a flat "per-mow" quote rarely fits every home here — a 3,000 sq ft Ten Trails lawn and a half-acre lot off Roberts Drive are two very different jobs. Below you'll find typical 2026 per-visit and monthly pricing for Black Diamond, a real sample quote for a roughly 4,000 sq ft lot, the neighborhoods local crews cover, ways to trim your bill, and a month-by-month calendar tuned for the cooler foothill climate. If you're comparing nearby markets, see our guides for Enumclaw, Maple Valley, Covington, and Auburn as well.
| Lot Size | Per Visit | Monthly (4×) |
|---|---|---|
| Small (under 3,000 sq ft) | $40 – $48 | $90 – $130 |
| Average (3,000 – 5,000 sq ft) | $45 – $60 | $110 – $180 |
| Large (5,000 – 10,000 sq ft) | $58 – $85 | $150 – $260 |
| Extra-large (10,000+ sq ft) | $80 – $120 | $220 – $400 |
Prices reflect 2026 rates from verified contractors serving the 98010 ZIP code area. Need an exact number? Get an instant Black Diamond lawn mowing quote based on your actual lot.
Sample quote based on a typical Black Diamond property. Your actual price may vary — get your own Black Diamond lawn mowing quote in 60 seconds.
Most reputable lawn care companies include the following on every weekly or bi-weekly visit. If a quote skips any of these, ask why before signing — they are considered industry-standard.
Lawn care companies typically offer one of three pricing models. Choosing the right one for your property and schedule can save 15–30% over the season.
| Pricing Model | Typical Price | Best For | Trade-offs |
|---|---|---|---|
| Per-visit (pay as you go) | $40 – $60 / visit | Occasional service, vacation rentals, fast-growing spring touch-ups | Highest per-visit rate; no guaranteed scheduling slot |
| Monthly contract (4 visits) | $160 – $240 / month | Most homeowners — a locked-in weekly schedule through the growing season | Locked into a single provider for the season; minor cancellation fees |
| Seasonal package (8 months) | $1,200 – $1,800 / season | Hands-off owners who want one annual invoice including spring + fall cleanup | Larger upfront commitment; less flexibility mid-season |
On-demand one-off mows in Black Diamond run a premium. A bi-weekly or weekly recurring plan typically saves 10–20% versus calling each time.
Spring and fall growth slows in the foothills, so bi-weekly cuts often keep up fine. Weekly service can roughly double your cost during slower-growth stretches.
Adding edging, weed-whipping, and blow-off to the same visit costs far less than booking them separately. Ask for a single all-in per-visit rate.
Keeping turf at 3–3.5 inches shades out moss and weeds common in this climate. Healthier grass needs fewer corrective services over the season.
Black Diamond's spread-out lots mean drive time is a real cost for crews. Booking the same day as a neighbor can earn both of you a small discount.
| ZIP | Neighborhoods Covered |
|---|---|
| 98010 | Black Diamond, Ten Trails, Lake Sawyer area, Railroad Ave corridor, and surrounding rural King County parcels |
A few local rules and conditions shape lawn care in Black Diamond. These affect timing and what a standard service includes.
Verified contractors on Quotly serve lawn mowing customers across Black Diamond and surrounding King County neighborhoods, including:
What to expect month-by-month for lawn mowing in the Black Diamond, WA climate.
| Month | Recommended Activity |
|---|---|
| January | Dormant season — no mowing; a good month to schedule equipment service and plan your spring contract. |
| February | Still dormant in the foothills; clear fallen branches and leaves so spring growth comes in evenly. |
| March | Growth begins to stir late in the month; book your recurring crew before the April rush fills schedules. |
| April | Growing season opens — first regular mows begin, often a week later than lowland cities due to higher elevation. |
| May | Peak spring flush; weekly or tight bi-weekly mowing keeps fast-growing turf in check. |
| June | Strong growth continues with longer days; edging and trimming demand is at its highest. |
| July | Drier, warmer weeks slow growth slightly; bi-weekly cuts are usually enough for most lawns. |
| August | Late-summer slowdown — raise the cut height a notch to protect turf during dry stretches. |
| September | Cooler, wetter weather revives growth; return to a tighter cadence and watch for moss. |
| October | Final regular mows of the season; schedule a last cut plus leaf cleanup before dormancy. |
| November | Growing season ends — mowing winds down to occasional leaf and debris removal only. |
| December | Dormant — no mowing; focus on gutter and yard cleanup ahead of winter. |
Flat lots are fastest and cheapest to mow. Sloped, terraced, or heavily-treed properties take longer and may require walk-behind mowers or extra trimming — typically a 10–20% surcharge.
Weekly mowing during the growing season is the most cost-effective schedule. Bi-weekly service costs more per visit because taller grass takes longer to cut, especially in fertile soils after heavy rain.
Growing seasons vary by region. Many contractors offer reduced winter rates or dormant-season cleanup packages. Booking right before peak growing season often locks in lower rates than starting mid-summer.
Edging, trimming, bagging clippings, fertilization, and aeration are common add-ons. Bundling these with regular mowing typically saves 15–25% compared to booking each separately.
Lawn care services are subject to state and local sales tax in most jurisdictions. Reputable contractors show this as a separate line item on quotes and invoices rather than burying it in the base rate.
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