Typical Lot Size
5,000–10,000
sq ft
Max ADUs
2
per lot
Permit Type
type_i
Timeline
4-8 weeks
Median Home Price
$550,000–$800,000
Est. ADU Rent
$1,500–$2,000/month
Neighborhood Overview
Sehome sits directly adjacent to Western Washington University, making it one of Bellingham's strongest rental markets. The neighborhood's mix of family homes and student housing creates consistent ADU demand, and hillside lots offer unique design opportunities.
University-adjacent neighborhood with mature trees, hillside views, Sehome Hill Arboretum access, and a mix of long-term residents and student renters. Quiet residential streets with strong community identity.
Hillside lots may have limited buildable area due to slope. Flat portions of the lot determine actual ADU footprint.
ADU Construction Allowed
Sehome qualifies for ADU construction under Bellingham's updated ordinance (BMC 20.10.036) and Washington's HB 1337.
- Detached ADUs (DADUs) allowed
- Attached ADUs allowed (basement, addition, above-garage)
- Up to 2 ADUs per lot
- Parking exempt (near transit)
Transit routes: WTA routes serving WWU campus
Why Build an ADU in Sehome
- Adjacent to WWU — consistent rental demand from students, faculty, and staff
- Larger lots than Lettered Streets provide more ADU placement flexibility
- Hillside lots may offer views from upper-level ADUs
- Transit-served area qualifies for parking exemptions
- Established neighborhood with mature trees and Arboretum access
Special Considerations
Hillside lots may require geotechnical assessment for foundation design
Steep slopes can increase construction costs by $15,000–$30,000 for retaining walls and engineered foundations
Some lots have limited flat buildable area — careful site planning is essential
Mix of student and long-term tenants — design your ADU for your target market
Learn more about ADU regulations: Review Bellingham ADU laws, understand the permitting process, or see the complete cost breakdown for Whatcom County.
Ready to get started? Our free feasibility study analyzes your specific parcel in 48 hours.
Frequently Asked Questions
Can I build an ADU on a hillside lot in Sehome?
Yes, but hillside lots may require a geotechnical assessment and engineered foundation. Steep slopes can add $15,000–$30,000 to construction costs for retaining walls and specialized foundations. Our feasibility study includes a slope analysis to determine buildability.
What rental income can I expect from a Sehome ADU?
Sehome ADUs typically rent for $1,500–$2,000/month. The proximity to WWU ensures strong demand from students, faculty, and staff. Long-term rentals tend to command higher rates than student-oriented units.
Are there critical areas concerns in Sehome?
Some Sehome lots have steep slopes that trigger critical areas review under Bellingham's code. This doesn't prevent ADU construction but may require additional studies and potentially limit where on the lot you can build. Our feasibility study checks all critical areas overlays.
Is Sehome better for attached or detached ADUs?
Both work well in Sehome. Lots with flat rear yards are great for detached ADUs, while hillside lots may be better suited for basement conversions (especially walk-out basements on sloped sites) or attached additions. Your lot's topography determines the best option.
