September 9, 2025
Removing a tree might seem straightforward, but in Whatcom County it often requires a permit, especially if your property is near water, within a watershed, or in a critical area. Knowing the rules before cutting can save you time, money, and potential fines.
Here’s a guide to understanding when a tree removal permit is needed in Whatcom County and how to get one.
When You Need a Tree Removal Permit
1. Watershed Properties (Lake Whatcom, Lake Samish, Lake Padden)
If you live within a designated watershed area, a permit is required for removing any significant tree:
- Evergreen trees with a trunk 12 inches or larger in diameter (measured at breast height).
- Deciduous trees with a trunk 8 inches or larger.
Tree canopy limits:
- You can remove up to 20% of tree canopy, but no more than 14,000 square feet total.
2. Tree Removal for Development Projects
Planning to build a house, add on to your property, or create a new driveway? Tree removal tied to development requires a permit.
- Lot size determines how much canopy you can clear (e.g., smaller lots allow up to 35%, larger lots less).
- You’ll need to provide a tree retention plan and canopy calculation.
3. Shoreline or Critical Area Buffers
If your property is near water, wetlands, or within 200 feet of a shoreline, stricter rules apply.
- Shoreline Exemption Permit – if removal costs are under $8,504.
- Shoreline Substantial Development Permit – if over $8,504.
You may also need an arborist report to show why the tree should be removed.
4. Hazardous Trees
Even hazardous trees, ones leaning dangerously or damaged by storms, usually require a permit before removal. An arborist risk assessment may be needed to support your application.
5. Forestry Practices
If you’re removing trees on larger forested property for timber or land clearing, you’ll need a Forest Practices Application/Notification through the Washington Department of Natural Resources (DNR).
6. Critical Areas and Land Disturbance
Tree removal in or near critical areas (like wetlands, streams, or steep slopes) often requires a Land Disturbance Permit, even for small projects.
What You’ll Need to Apply
When submitting your Whatcom County Tree Removal Permit, you may be asked for:
- A completed application form (tree removal + master application).
- A site plan showing your lot, existing trees, structures, and canopy coverage.
- Canopy calculations (how much you’re removing vs. how much stays).
- Tree removal and replanting plan.
- Tree Risk Assessment (if the tree is hazardous).
- Photos of the trees in question.
- Application fee (an invoice will be issued once reviewed).
Summary of Permit Rules
| Situation | Permit Required? | Notes |
| Watershed properties | ✅ Yes | 20% canopy max, 14,000 sq. ft. limit |
| Development-related removal | ✅ Yes | Retention plan + canopy calculation |
| Shoreline or buffer zone | ✅ Yes | Shoreline permit + arborist report |
| Hazardous trees | ✅ Usually | Risk assessment required |
| Forest practices (timber harvest) | ✅ Yes | Apply through WA DNR |
| Critical areas (wetlands/slopes) | ✅ Yes | May need Land Disturbance Permit |
Frequently Asked Questions
What size tree requires a permit in Whatcom County?
A permit is needed for evergreen trees 12 inches or more in diameter at breast height (DBH) and deciduous trees 8 inches DBH or more.
Do I need a permit to remove a hazardous tree?
If a tree is an immediate hazard to people or property, it can be removed, but you should still notify the county and document the condition.
Are there special rules for shorelines and critical areas?
Yes. Properties within 200 feet of a shoreline, wetland, or stream often need additional permits and reviews under the Shoreline Management Program.
How much canopy can I remove without development?
You can remove up to 20% of the canopy without development-related permits, but larger removals may require approval. Minor pruning is allowed, but anything changing the landscape may need a permit.
What happens if I remove a tree without a permit?
You may face fines, violations, and replanting requirements. The county enforces these rules to protect sensitive areas.
Need Professional Help?
If you need expert tree removal services or guidance on permits, contact Earthworks Tree Service. We’re available 24/7 to assist you with safe, compliant tree care.
- Phone: (360) 924-0009
- Business Hours: 24/7
