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Edmonds, WA Environmental Rules: Boat Dock Permits (2026)

Some Restrictions
Compiled from the official code textEditor Martyn O'NeillLast verified September 2026

Key Facts

Height limit
5 feet above ordinary high water mark
Length limit
35 feet or neighborhood average, whichever is less
Setback
10-foot side yard from property line
Size cap
400 square feet for residential docks
Permit exemption threshold
$2,500 fair market value in Puget Sound
Marina threshold
5 or more boats regulated as a marina

Summary

Edmonds regulates private docks, piers and floats through its Shoreline Master Program. A single-family dock is a water-dependent use but must meet strict height, length, width and setback limits, and most residential docks worth $2,500 or less in Puget Sound are exempt from the standard shoreline substantial development permit.

A. Applicability. ... Docks are fixed structures floating upon water bodies. Piers are fixed, pile-supported structures. Floats are floating structures that are moored, anchored, or otherwise secured in the water that are not connected to the shoreline. Docks, piers, and floats that serve four or fewer boats regularly moored are reviewed a recreational facilities. Proposals for five or more boats are considered marinas and are regulated under ECDC 24.60.020, Boating facilities. ... i. Height. ... The height of a residential dock or pier shall not exceed five feet above the ordinary high water mark. ... ii. Length. ... The length of any residential dock or pier shall not exceed the lesser of 35 feet or the average length of existing docks or piers within 300 feet of the subject dock or pier. i ... ... v. Setbacks. All residential docks or piers shall observe a minimum 10-foot side yard setback from a property line or a storm drainage outfall. ... vi. Size. ... No residential dock or pier shall exceed 400 square feet.

View official code

Official source re-checked September 8, 2026: no newer edition of the code had been published (publisher’s edition: current through Ordinance 4444, passed August 3, 2026).

Full Breakdown

030. A dock is a fixed structure floating on the water; a pier is a fixed, pile-supported structure; a float is a floating structure moored or anchored but not connected to shore. 020, Boating facilities. 030(D)(8)(c) sets detailed development standards: height cannot exceed five feet above the ordinary high water mark, length is capped at the lesser of 35 feet or the average length of docks within 300 feet, width may not exceed 25 percent of the lot's shoreline frontage, and the structure must observe a 10-foot side yard setback from the property line or a storm drainage outfall.

No lot may have more than one dock or pier, total size is capped at 400 square feet, offshore recreational floats are prohibited, and covered buildings on a dock are barred outright. Citywide, piers and docks cannot be treated with creosote, oil-based paints or other toxic substances, and any structure extending waterward of the inner harbor line requires a lease from the Washington Department of Natural Resources before the city will process the application. 010(B)(7), a dock built for the private, noncommercial use of a single-family or multi-family residence owner is exempt if its fair market value does not exceed $2,500 in Puget Sound. 80.

Violations & Fines

Building a dock, pier or float beyond these limits, or without the required shoreline substantial development permit or DNR lease, is a violation of the Shoreline Master Program. ECDC 24.80.170 routes enforcement, investigation and penalties through ECDC 20.110.040 together with WAC 173-27 Part II and RCW 90.58.210 and 90.58.220, meaning the city can issue notices of violation and pursue civil penalties, and unpermitted moorage structures can be ordered removed or brought into compliance.

Frequently Asked Questions

Do I need a permit to build a dock at my Edmonds waterfront home?
Most single-family docks in Puget Sound with a fair market value of $2,500 or less are exempt from Edmonds's shoreline substantial development permit under ECDC 24.80.010(B)(7), though you still must meet the dimensional standards in ECDC 24.50.030 and obtain any required building permit. Larger, costlier or commercial docks need a full substantial development permit.
How big can a residential dock be in Edmonds?
Under ECDC 24.50.030(D)(8)(c), a residential dock cannot exceed 400 square feet total, must stay under five feet above the ordinary high water mark, cannot run longer than 35 feet (or the neighborhood average within 300 feet, if less), and is capped at 25 percent of the lot's shoreline width.
How many boats can I moor at a private dock before it counts as a marina?
ECDC 24.50.030(A) treats docks, piers and floats serving four or fewer regularly moored boats as recreational facilities under the standard moorage rules. Once a proposal serves five or more boats, Edmonds regulates it as a marina under the boating facilities standards in ECDC 24.60.020 instead.
Can I extend my dock past the inner harbor line in Edmonds?
Yes, but ECDC 24.50.030(C)(6) requires you to obtain a lease from the Washington Department of Natural Resources before the city will process a permit for any pier, dock or float extending waterward of the inner harbor line.

Sources & Official References

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