Because Washington's powerful RLTA protections (prohibited clauses, mandatory disclosures, non-waivable habitability duties) do not apply to commercial tenancies, the written commercial lease becomes the sole governing law for the relationship. If a provision is not explicitly stated in the lease, a Washington judge will generally not insert one on behalf of either party.

The Triple Net (NNN) Framework

The dominant lease structure in Washington's commercial real estate market is the Triple Net (NNN) Lease, where the tenant bears all "Three Nets":

1. Property Taxes (N1): The tenant's pro-rata share of the building's property tax bill.
2. Insurance (N2): The tenant's share of the building insurance premium, plus their own commercial liability policies.
3. Common Area Maintenance / CAM (N3): The tenant's share of all operational costs for shared areas.

The lease must mathematically define the formula for calculating pro-rata shares (typically based on the tenant's occupied square footage relative to the total leasable square footage).

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Essential Commercial Lease Elements

1. The "Permitted Use" Clause

A landlord must tightly control the activity within their building to prevent zoning disputes and conflicts between co-tenants. The lease must detail exactly what the tenant is permitted to do (e.g., "General technology office use exclusively," or "Retail sale of coffee and baked goods only, specifically excluding the preparation of hot foods requiring a Type I commercial ventilation hood").

2. Assignment and Subletting

Many commercial businesses fail or need to relocate. The lease must define whether and how a tenant can transfer the lease to a new business entity.

• Standard Washington commercial leases require the landlord's "Prior Written Consent" for any assignment or sublet.
• The lease typically stipulates consent "shall not be unreasonably withheld, conditioned, or delayed" to comply with good faith expectations.

3. Alterations and Build-Outs (Trade Fixtures)

The lease must address:

• Whether the tenant can make structural alterations (knocking down walls, installing heavy kitchen equipment).
• Whether the landlord must approve architectural plans in writing before work begins.
• Who owns the improvements ("Trade Fixtures") when the lease expires—and whether the tenant must restore the space to its original "vanilla shell" condition.

4. Personal Guarantees

For smaller businesses leasing under an LLC structure, Washington commercial landlords routinely require the individual business owner to sign a "Personal Guarantee" on the lease, making the individual personally liable for the full remaining term of base rent if the LLC defaults and dissolves.

How Landager Helps

Managing Washington properties requires precision, especially with Seattle's strict security deposit caps and the statewide 30-day return deadline. Landager automates the mandatory move-in checklist process, tracks the 14-day "pay or vacate" notices, and ensures rent increases are delivered with the required 90-day notice. From managing installment payment requests to staying compliant with Just Cause eviction requirements, Landager helps you navigate the complex RCW 59.18 landscape.

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