Washington landlord guide — Superior Court info, local rules & the Moses Lake, Ephrata & Quincy rental market
📍 County Seat: Ephrata (~8,718) • Largest City: Moses Lake (~26,000) 👥 Pop. ~102,000 — Moses Lake Micropolitan Statistical Area ⚖️ Grant County Superior Court • 35 C St NW, Ephrata (paperless since Jan 2026) 🌾 Columbia Basin Project • Grand Coulee Dam • 44% Hispanic/Latino • Data centers
Grant County occupies the heart of Washington’s Columbia Basin — a vast, semi-arid landscape transformed by one of the 20th century’s most ambitious engineering projects: the Columbia Basin Project, anchored by the Grand Coulee Dam on the Columbia River. Before the dam and its associated irrigation canals arrived, this region was largely described as desolate and unsuitable for farming. After irrigation, it became one of the most productive agricultural areas in the world. The county stretches from the Grand Coulee Dam in the north to the Columbia River basin in the south, covering over 2,600 square miles of irrigated farmland, sand dunes, lava rock formations, and coulee canyons. Moses Lake, the county’s largest city at approximately 26,000 residents, has grown from an agricultural service town into a regional center with active aerospace, manufacturing, data center, and clean energy sectors. Ephrata, the county seat at roughly 8,718 residents, is a smaller government and service hub 20 miles west of Moses Lake on Highway 28.
Grant County is a significant agricultural powerhouse — generating approximately 20% of all Washington state agricultural sales from its irrigated cropland of potatoes, apples, corn, hops, hay, and wine grapes. Agriculture and related industries are the county’s largest employer sector, but the economy has diversified considerably with aerospace activity at Grant County International Airport (Moses Lake), a growing data center industry attracted by cheap hydroelectric power, and a manufacturing base. The county’s population is approximately 43.9% Hispanic/Latino, reflecting deep agricultural labor immigration roots, with 16.1% foreign-born and 87.7% U.S. citizens. Median property values are approximately $299,500. The county’s rental market is active across Moses Lake, Quincy, Ephrata, and numerous agricultural communities. Critically, the Grant County Superior Court Clerk went paperless effective January 2, 2026 — all eviction filings must now comply with strict digital formatting requirements.
📊 Quick Stats
County Seat
Ephrata (~8,718; Columbia Basin Project history; government hub; Amtrak stop)
Largest City
Moses Lake (~26,000; aerospace; manufacturing; data centers; I-90; commercial hub)
Other Communities
Quincy (~8,000; data centers; ag), Mattawa (~5,000; majority-Hispanic; wine grapes), Warden (~3,000), Royal City (~1,600), Grand Coulee (~1,000; dam), George, Soap Lake, Coulee City
Population
~102,000 (2024) — Moses Lake Micropolitan Statistical Area
Economy
Agriculture #1 (potatoes, apples, corn, hops, wine grapes — 20% of WA ag sales); aerospace (Moses Lake airport); data centers (Quincy, Moses Lake); manufacturing; healthcare; government
Demographics
43.9% Hispanic/Latino; 16.1% foreign-born; 87.7% U.S. citizens
Median Property Value
~$299,500 (2024) — below state average; relatively affordable
⚠️ Paperless Court Filing
As of Jan 2, 2026, Clerk’s Office has NO paper files — all documents must comply with digital formatting rules or will be REJECTED
Rent Control
None locally; WA statewide rent cap applies (RCW 59.18.700)
Just-Cause Eviction
Yes — RCW 59.18.650 statewide
⚡ Eviction At-a-Glance
Nonpayment Notice
14-Day Pay or Vacate (statutory form required — RCW 59.18.057)
Lease Violation
10-Day Comply or Vacate
Waste / Nuisance / Unlawful Activity
3-Day Notice to Quit
No-Cause (month-to-month)
Not permitted — just-cause required statewide
Owner Move-In
90-Day Advance Written Notice
Sale of Single-Family Home
90-Day Advance Written Notice
Demolition / Rehab / Change of Use
120-Day Advance Written Notice
Security Deposit Return
30 days after vacancy or notice of abandonment
Rent Increase Notice
90 days advance written notice
Rent Increase Cap
Lesser of CPI+7% or 10% per 12 months (RCW 59.18.700)
Courthouse
35 C Street NW, Ephrata, WA 98823
Court Phone
(509) 754-2011
Grant County — Local Rules & Washington State Law Highlights
Topic
Rule / Notes
⚠️ PAPERLESS FILING — Critical as of January 2026
Effective January 2, 2026, the Grant County Superior Court Clerk’s Office operates entirely without paper files. All documents filed in Superior Court (including unlawful detainer petitions, summons, motions, and proposed orders) must comply with the court’s digital formatting requirements. Documents that do not comply will be rejected and returned. A “Formatting Requirements Checklist” is available from the Clerk’s Office and on the court website. This is a significant operational change — landlords who previously filed paper evictions must now use digitally compliant documents. Consult with a local attorney or the court clerk’s office (509-754-2011) before filing to confirm current requirements. Clerk: Kimberly A. Allen.
New Judge — Jennifer Richardson (Jan 9, 2026)
Governor Ferguson appointed Hon. Jennifer Richardson to Grant County Superior Court effective January 9, 2026, filling the vacancy created when Judge Tyson Hill was elevated to the Court of Appeals, Division III. Richardson joins Hon. Melissa K. Chlarson and Hon. Anna L. Gigliotti on the three-judge bench, with Commissioner Tom Middleton. Richardson is the seventh person to serve on the Grant County bench in the past five years, reflecting significant judicial turnover.
Rental Licensing
No county-level rental licensing requirement in Grant County. Washington has no statewide landlord licensing statute. The City of Moses Lake and City of Ephrata do not require general residential rental registration for standard long-term leases as of 2025. Verify any local STR or rental ordinances with the city of operation before establishing vacation rentals — particularly near Moses Lake waterfront and the Grand Coulee Dam recreation corridor. Grant County’s District Court handles municipal court functions for a large number of cities under interlocal agreements; confirm which jurisdiction applies to your property.
Rent Control & Rent Increase Cap
No local rent control. Washington’s statewide rent increase cap (RCW 59.18.700, effective 2025): annual increases for tenancies of 12+ months capped at the lesser of CPI+7% or 10%. Grant County’s relatively affordable housing market (median property value ~$299,500) still sees meaningful rent increases in active markets like Moses Lake and Quincy. Exemptions (RCW 59.18.710): buildings under 10 years old, single-family residences not in a rental complex, income-based subsidized housing, tenancies under 12 months. 90 days’ advance written notice required for all rent increases.
Just-Cause Eviction
Washington’s just-cause eviction law (RCW 59.18.650) applies statewide. No-cause month-to-month terminations are not permitted. Permitted causes: nonpayment (14-day statutory form), substantial lease violation (10-day cure notice), waste/nuisance/crime (3-day), owner/family move-in (90-day), sale of single-family home (90-day), demolition/rehab/change of use (120-day).
14-Day Notice — Statutory Form & Spanish
Washington’s 14-day pay-or-vacate notice must use the exact statutory form (RCW 59.18.057): separately itemize rent, utilities, and recurring charges; require non-electronic payment (cashier’s check, money order, certified funds) unless the rental agreement provides otherwise; and include the Eviction Defense Screening Line (855-657-8387) and the AG’s website (www.atg.wa.gov/landlord-tenant). A non-conforming notice results in dismissal. Spanish-language translations of the statutory 14-day notice are available from the AG’s office — essential in a county that is 43.9% Hispanic/Latino. Use bilingual notices and leases as standard practice throughout Grant County.
Security Deposit Requirements
No statutory cap on deposit amount. Required: (1) written rental agreement specifying deposit terms; (2) signed written move-in condition checklist at tenancy start (failure = landlord liable for full deposit); (3) deposit held in trust account at Washington-licensed financial institution with written notice of depository to tenant (RCW 59.18.270); (4) return with itemized statement and documentation within 30 days (RCW 59.18.280). No deductions for ordinary wear and tear. Intentional refusal to return: up to 2x damages.
Deposit Installment Plans
Upon written tenant request, landlords must allow deposits and nonrefundable fees to be paid in installments (RCW 59.18.610): 3 monthly installments for leases of 3+ months; 2 otherwise. No fees or interest permitted. Refusal triggers a 1-month rent penalty plus attorneys’ fees.
Source of Income — Critical in Agricultural Communities
Statewide prohibition on source-of-income discrimination (RCW 59.18.255). Landlords throughout Grant County may not reject applicants based on Housing Choice Vouchers, public assistance, veterans benefits, Social Security, SSI, or any government/nonprofit benefit. Voucher amount must be subtracted from rent before applying income thresholds. Civil penalty: up to 4.5x monthly rent. Grant County’s large agricultural workforce — including many seasonal and H-2A workers and their families — relies heavily on assistance programs. Communities like Mattawa (majority-Hispanic) and Warden have significant HCV populations. The Grant County Housing Authority administers HCV programs locally.
Landlord Entry
Minimum 2 days’ (48 hours’) advance written notice with exact date and time stated (RCW 59.18.150). Entry only at reasonable times. Emergency entry without notice permitted. After one written warning, each unauthorized entry: $100 per violation.
Late Fees
No late fees for rent paid within 5 days of the due date (RCW 59.18.170). Late fees in any court judgment capped at $75 total (RCW 59.18.410).
Utility Shutoffs & Extreme Heat
Intentional utility terminations are unlawful: $100/day per service plus actual damages (RCW 59.18.300). During NWS heat-related alerts, landlords may not disconnect electric or water and must reconnect on tenant request (RCW 59.18.060(11)). Grant County is one of Washington’s hottest regions — Moses Lake and Ephrata regularly exceed 100°F in summer; heat advisories are common. The utility reconnection obligation during heat alerts is a frequent compliance issue for landlords with utility-included units in this region.
Seasonal Agricultural Exemption
Housing provided by an employer in conjunction with seasonal agricultural employment is exempt from RCW Chapter 59.18 (RCW 59.18.040(7)). Grant County’s massive agricultural sector employs large numbers of seasonal workers — potato harvest, apple harvest, asparagus, hops. Employer-tied housing provided as part of that employment is exempt. Standard market-rate rentals to agricultural workers are RLTA-covered. Document the employment-housing relationship clearly in writing for any claimed exemption. Note: H-2A guest worker housing is typically employer-tied and exempt; individual family rentals to year-round or returning agricultural workers are almost always RLTA-covered.
Grant County Superior Court
Address: 35 C Street NW, Ephrata, WA 98823 (Second Floor) Mailing: P.O. Box 37, Ephrata, WA 98823 Phone: (509) 754-2011 • Fax: (509) 754-6036 Judges: Hon. Melissa K. Chlarson, Hon. Anna L. Gigliotti, Hon. Jennifer Richardson (appointed Jan 9, 2026) Commissioner: Tom Middleton Administrator: Crystal Burns County Clerk: Kimberly A. Allen • (509) 754-2015 ⚠️ PAPERLESS SINCE JAN 2, 2026: All filings must comply with digital formatting requirements — noncompliant documents are rejected. Review the “Formatting Requirements Checklist” from the clerk’s office before filing any eviction. District Court: Two locations — Ephrata (main) and Moses Lake • (509) 754-2016 • 3 judges + 1 commissioner; handles municipal cases for Coulee City, Electric City, Ephrata, George, Grand Coulee, Mattawa, Moses Lake, Quincy, Royal City, Soap Lake, and Warden.
Confirm current information at grantcountywa.gov.
Tenant Right to Counsel & Legal Aid
Indigent tenants have the right to a court-appointed attorney in eviction proceedings (RCW 59.18.640) — at or below 200% of the federal poverty level. The Eviction Defense Screening Line is 855-657-8387. This must appear on both the 14-day notice and the statutory summons. Columbia Legal Services and Northwest Justice Project serve Grant County. With a 43.9% Hispanic/Latino population, bilingual legal services are available from these organizations.
Tenant Can Cure?Yes - tenant can pay full amount due within 14 days to cure. Payment must first be applied to amounts shown on notice.
Days to Hearing7-20 days
Days to Writ3-5 days
Total Estimated Timeline30-75 days
Total Estimated Cost$300-$800
⚠️ Watch Out
VERY tenant-friendly. Just Cause Eviction statewide (RCW 59.18.650) - landlord must have enumerated cause to evict. 14-day notice must use specific statutory form language including info about legal aid, dispute resolution centers, and right to appointed counsel. Notice must be in multiple languages per AG website. Rent increases capped at 7%+inflation or 10%, whichever lower. 60-day notice for rent increases. Right to counsel for qualifying low-income tenants.
Serve the required notice based on the eviction reason (nonpayment or lease violation).
Wait for the notice period to expire. If tenant cures the issue (where allowed), the process stops.
File an eviction case with the Superior Court - Unlawful Detainer. Pay the filing fee (~$45-60).
Tenant is served with a summons and has the opportunity to respond.
Attend the court hearing and present your case.
If you prevail, obtain a writ of possession from the court.
Law enforcement executes the writ and removes the tenant if necessary.
⚠️ Disclaimer: This page provides general information about Washington eviction laws and does not constitute legal advice.
Eviction procedures can vary by county and may change over time. Local jurisdictions may have additional requirements or tenant protections.
For specific legal guidance, consult a qualified Washington attorney or local legal aid organization.
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⚠️ Disclaimer: These calculations are estimates based on state statutes and typical court timelines. Actual results vary by county, court backlog, and case specifics. Always verify current requirements with your local courthouse. This is not legal advice.
Underground Landlord
🏘️ Communities & Screening Tips
Moses Lake (largest city; commercial center; aerospace; data centers; I-90): Moses Lake is Grant County’s economic engine — a rapidly diversifying city with a strong aerospace cluster at Grant County International Airport (one of the world’s longest runways, used for flight testing and delivery), growing data center industry (cheap hydroelectric power attracts major tech firms), food processing, and a large retail/service sector. The tenant base spans a wide range: agricultural and food-processing workers, aerospace and tech employees, healthcare workers, I-90 logistics and distribution workers, and a substantial Hispanic community. Screen for stable employment across multiple sectors. Moses Lake’s growth has tightened the rental market over recent years.
Ephrata (county seat; government hub; Amtrak stop; smaller): Ephrata’s rental market is smaller than Moses Lake’s but stable, dominated by county and state government employees, school district staff, and healthcare workers. The Empire Builder Amtrak train stops in Ephrata. Screen for stable government or healthcare employment as the most reliable income base.
Quincy (data center corridor; agriculture; growing): Quincy has become internationally significant as a data center hub — Microsoft, Google, and other major firms have large facilities there, attracted by cheap Columbia River hydroelectric power and I-90 connectivity. This has created a growing market for tech-worker housing alongside the traditional agricultural workforce. Screen for stable tech-sector employment (generally excellent income stability) or agricultural income (use annual verification). Rental vacancy in Quincy is relatively tight given strong demand from both sectors.
Mattawa, Warden, Royal City (agricultural communities; majority-Hispanic; seasonal income): These smaller communities are deeply agricultural with majority-Hispanic populations and significant seasonal workforce populations. Mattawa (~5,000) is surrounded by wine grape vineyards contributing 25% of Washington’s wine grape production. Standard income verification must account for seasonal income patterns — verify annual rather than monthly income for agricultural workers. Source-of-income protection (RCW 59.18.255) is critical in these communities; HCV and agricultural assistance reliance is high.
Agricultural Workforce & H-2A Workers: Grant County employs large numbers of both domestic and H-2A guest agricultural workers. Employer-provided H-2A housing is typically exempt from RLTA (RCW 59.18.040(7)). When H-2A workers or family members rent market-rate housing independently, that tenancy is fully RLTA-covered regardless of immigration or employment status. Washington’s fair housing law applies regardless of citizenship status.
Background checks, eviction history, credit reports — get the full picture before handing over the keys.
Grant County Washington Landlord-Tenant Law: Renting in Moses Lake, Ephrata, Quincy, and the Columbia Basin
Grant County is a study in transformation — a vast semi-arid landscape that the federal government converted into one of the nation’s most productive agricultural regions through the Columbia Basin Project and the Grand Coulee Dam, the largest hydroelectric power facility in the United States. The irrigation canals and cheap power that flow from Grand Coulee have shaped everything about Grant County: its economy, its demographics, its communities, and its rental market. Agriculture generates approximately 20% of all Washington state agricultural sales from Grant County’s irrigated fields of potatoes, apples, corn, hops, wheat, and wine grapes — a staggering concentration of productivity. That agricultural wealth has also drawn a large and diverse Hispanic/Latino workforce: 43.9% of Grant County’s ~102,000 residents are Hispanic or Latino, 16.1% are foreign-born, and communities like Mattawa are majority-Hispanic. In recent years the same cheap hydroelectric power that irrigates the fields has attracted a very different industry — major data center campuses from Microsoft, Google, and others in Quincy and Moses Lake, drawn by electricity rates among the lowest in the nation.
Paperless Court Filing — A Critical 2026 Change
Effective January 2, 2026, the Grant County Superior Court Clerk’s Office operates entirely without paper files. This is a significant procedural change: all documents filed in Grant County Superior Court — including unlawful detainer petitions, summons, proposed orders, and any other filings — must comply with the court’s digital formatting requirements. Documents that do not comply with the formatting rules will be rejected and returned. The Clerk’s office (Kimberly A. Allen, 509-754-2015) has published a “Formatting Requirements Checklist” that must be reviewed before any filing. Landlords who previously filed paper evictions in Grant County must adapt to this new process. The courthouse is at 35 C Street NW in Ephrata (mailing: P.O. Box 37, Ephrata, WA 98823; main phone: 509-754-2011). Three judges currently serve: Hon. Melissa K. Chlarson, Hon. Anna L. Gigliotti, and Hon. Jennifer Richardson — the latter appointed by Governor Ferguson on January 9, 2026, following Judge Tyson Hill’s elevation to the Court of Appeals.
Source of Income, Bilingual Notices, and the Agricultural Economy
Washington’s source-of-income anti-discrimination law (RCW 59.18.255) has particular force in Grant County’s agricultural communities. A significant share of the rural tenant population relies on Housing Choice Vouchers, SNAP, Medicaid, and agricultural assistance programs. Rejecting a qualified applicant because they use a housing voucher exposes a landlord to a penalty of up to 4.5 times the monthly rent. The AG’s office provides Spanish-language translations of the statutory 14-day pay-or-vacate notice — using bilingual notices and leases is strongly recommended in a county where over 40% of residents are Hispanic/Latino. Columbia Legal Services and Northwest Justice Project serve Grant County and offer bilingual tenant legal assistance. The Grant County District Court, which handles municipal court functions for a dozen cities under interlocal agreements, is moving to electronic filing effective June 1, 2026 — another procedural transition landlords should be aware of.
This page is provided for general informational purposes only and does not constitute legal advice. All residential evictions in Grant County are filed at Grant County Superior Court, 35 C Street NW (P.O. Box 37), Ephrata, WA 98823 — (509) 754-2011. CRITICAL: As of January 2, 2026, the Clerk’s Office is paperless — all documents must comply with digital formatting requirements or will be rejected. Review the Formatting Requirements Checklist before filing. Washington requires the exact statutory 14-day pay-or-vacate form (RCW 59.18.057); Spanish-language versions available from AG’s office; defective notices result in dismissal. Just-cause eviction requirements apply statewide (RCW 59.18.650). Rent increases for 12-month+ tenancies capped at lesser of CPI+7% or 10% with 90 days’ notice (RCW 59.18.700). Source of income discrimination is prohibited (RCW 59.18.255). Seasonal agricultural employee housing in conjunction with employment may be exempt under RCW 59.18.040(7). Consult a licensed Washington attorney for specific guidance. Last updated: March 2026.
⚠️ Legal Disclaimer: This page is provided for general informational purposes only and does not constitute legal advice. All residential evictions in Grant County are filed at Grant County Superior Court, 35 C Street NW (P.O. Box 37), Ephrata, WA 98823 — (509) 754-2011. CRITICAL: Effective January 2, 2026, the Clerk’s Office is entirely paperless — all documents must comply with digital formatting requirements or will be rejected and returned. Review the Formatting Requirements Checklist from the Clerk before filing. Washington requires the exact statutory 14-day pay-or-vacate form (RCW 59.18.057); Spanish-language versions available from the AG’s office; non-conforming notices result in dismissal. Just-cause eviction requirements (RCW 59.18.650) apply statewide. Rent increases for 12-month+ tenancies are capped at the lesser of CPI+7% or 10% with 90 days’ advance written notice (RCW 59.18.700). Source of income discrimination is prohibited statewide (RCW 59.18.255). Seasonal agricultural employee housing provided in conjunction with employment may be exempt under RCW 59.18.040(7). Consult a licensed Washington attorney for specific guidance. Last updated: March 2026.
