Mechanical dethatching

Dethatching, Priced by Lawn Size


Most lawns:

$360–$540 tax included

Blades pull the dead layer out and I haul it away. Check your thatch before you book this — most lawns do not need it.

Your address is what I price from. Your number is where I send it.

I text — I don’t call, and I measure from satellite — no estimator comes out.

Check your thatch before you buy this

Thatch is the brown spongy layer of undecomposed stem, crown and root material sitting between the green growth and the soil. Cut a small wedge out of the turf and look at how thick it is. That measurement decides whether this job is worth your money, and most of the time it is not.

The threshold is

half an inch

— WSU is direct about it: thatch in excess of half an inch should be removed, because it starts stopping water reaching the roots. Under half an inch it is doing no harm, and WSU is equally direct that regular power raking is not a beneficial practice for home lawns. If that is your lawn, book core aeration instead — it breaks the thatch down over time, and it costs a third of this.

What actually causes thatch

Not your grass clippings — WSU is explicit that clippings contribute little to thatch formation, so mulch-mowing is not the culprit. What builds it is excess fertilizer, overwatering, improper mowing, and acid soil that slows decomposition down. Fix those and the thatch stops coming back after I have taken it out.

Source: WSU Hortsense, Lawn and Turf: Thatch · WSU Extension King County, Tip Sheet 11: Lawns

What dethatching costs

Three times aeration, because it is a slower pass and it produces a great deal of material to clear. Debris removal is in the price. Over 6,000 sq ft is by estimate.

Lawn size (sq ft)

Up to 2,000

2,0006,000+

Price

$360tax included

Text me my price

Don’t know your size? That’s what the satellite measure is for.

All six sizes
  • Up to 2,000 $360
  • 2,001 - 3,000 $405
  • 3,001 - 4,000 $450
  • 4,001 - 5,000 $495
  • 5,001 - 6,000 $540
  • Over 6,000 By estimate

All prices include Washington sales tax. What you see is what you pay.

Where I’m working

I run routes across Pierce County and King County, with some Snohomish County work in the north.

  • Algona
  • Edgewood
  • Federal Way
  • Fife
  • Fircrest
  • Lakewood
  • Milton
  • Pacific
  • Puyallup
  • Sumner
  • Tacoma
  • University Place
  • Auburn
  • Burien
  • Des Moines
  • Kent
  • Normandy Park
  • Renton
  • SeaTac
  • Tukwila
  • Bellevue
  • Issaquah
  • Kirkland
  • Mercer Island
  • Newcastle
  • Redmond
  • Sammamish
  • Seattle
  • Woodinville
  • Bothell
  • Brier
  • Edmonds
  • Everett
  • Kenmore
  • Lake Forest Park
  • Lynnwood
  • Marysville
  • Mill Creek
  • Mountlake Terrace
  • Mukilteo
  • Shoreline

Not sure if you’re on a route?

Send your address anyway — I’ll tell you straight.

Dethatching FAQ

How do I know if I actually need dethatching?

Cut a small wedge out of the turf and look at the brown spongy layer sitting between the green growth and the soil. WSU puts the threshold at half an inch: thatch in excess of half an inch should be removed, because it starts stopping water reaching the roots. Under that, it is doing no harm.

What if my thatch is under half an inch?

Then do not buy this. WSU is blunt that regular power raking is not a beneficial practice for home lawns, and recommends core aeration one to two times a year to break the thatch layer down instead. Aeration is a third of the price and it is what I would book you for.

What does dethatching cost?

By lawn size, $360–$540 for lawns up to 6,000 sq ft, tax included. Over 6,000 sq ft is by estimate. It runs three times aeration because it is a slower pass and it produces a great deal of material to clear.

Do grass clippings cause thatch?

No. WSU is explicit that grass clippings contribute little to thatch formation. Thatch is undecomposed stem, crown and root material. What actually builds it is excess fertilizer, overwatering, improper mowing, and acid soil that slows decomposition.

When is the best time to dethatch?

Early spring, per WSU. The lawn needs the growing season ahead of it to fill back in, which is why I will not power rake a lawn going into winter.

Will my lawn look worse afterwards?

Yes, at first, and anyone who tells you otherwise has not done it. Power raking pulls a large amount of dead material out and the lawn looks thin and torn up until it grows back in. That is why it is a spring job and why it is not something to do every year.

Do you haul the debris away?

Yes. That is a real part of what this costs - a dethatched lawn can produce several bags of material, and clearing it is included in the price you were quoted.

Do I have to sign a contract?

No. This is a one-time job. No contract, no auto-renew, no cancellation fee.

Send your address, get your price

About five minutes for a firm number. No contract, no deposit, nothing to pay today.

Text me my price

Texting only — I don’t take calls, and I don’t send an estimator. Text me at 206-512-5614.