What Is a Master Use Permit in Seattle?

A master use permit (MUP) is the land use approval that comes before the building permit. If your project needs a zoning variance, design review, conditional use approval, or shoreline permit, the MUP is where those decisions get made. The building permit covers construction. The MUP covers whether the city allows your proposed use in the first place.

When You Need a MUP

Not every project requires one. A straightforward apartment building on a properly zoned lot can skip straight to a building permit. You need a MUP when your project triggers one or more of these:

Design Review for projects above size thresholds in the zone (8+ units in LR zones, for example)
Conditional Use for uses that require special approval in a given zone
Variances from setback, height, or lot coverage standards
Shoreline permits for projects within 200 feet of a shoreline
SEPA review for projects above environmental thresholds
Planned unit development or other special land use approvals

If none of these apply, you file a building permit directly with SDCI.

MUP vs. Building Permit

These two permits serve different purposes and move through separate review tracks.

	Master Use Permit	Building Permit
What it covers	Land use, zoning compliance, design review	Construction plans, structural, mechanical, electrical
Who reviews it	SDCI land use planners, Design Review Board	SDCI building plan reviewers
Public process	Yes, includes notice and comment periods	No public comment
Typical timeline	6 to 24 months	2 to 12 months
Can be appealed	Yes, to the Hearing Examiner	No

For large projects, these permits overlap in time. You can submit a building permit application while the MUP is still in review, which saves months on the overall timeline. SDCI calls this "parallel processing."

The MUP Process

Pre-application conference. Optional, but SDCI staff will flag issues before you file.
Application. Submit plans, project description, and fees to SDCI.
Notice of application. SDCI posts a public notice, starting the comment period.
Design review meetings. If design review is required, the project goes through Early Design Guidance and a Recommendation meeting (two separate public meetings with the Design Review Board).
SEPA determination. If environmental review applies, SDCI issues a threshold determination.
Decision. SDCI issues the MUP with conditions, or denies it.
Appeal period. 14 days for appeals to the Hearing Examiner.

Common Conditions

MUPs are rarely approved without conditions. The Design Review Board and SDCI planners attach requirements based on the public process. Typical conditions include:

Facade material changes or additional articulation
Landscaping and streetscape improvements
Pedestrian access modifications
Setback or step-back adjustments at upper floors
Transportation demand management plans

These conditions carry over to the building permit. Your construction drawings must show compliance.

How MUPs Affect Your Timeline

Design review is the biggest time variable. A project that triggers a two-meeting design review process (EDG plus Recommendation) adds 6 to 18 months on top of the building permit timeline. If the board requests revisions, add another 3 to 6 months for a third meeting.

Projects that need both SEPA review and design review can spend two years in the MUP phase before construction drawings are even submitted.

Tracking MUPs on BuildVue

BuildVue links MUPs to their associated building permits at the same address, so you can see the full project timeline in one place. Filter for "Land Use" status projects on the map to see projects in the MUP phase.