Building Setbacks & Zoning in Matanuska-Susitna Borough, AK (2026)
3 rules for unincorporated Matanuska-Susitna Borough, Alaska.
Verified from official government sources
Setback Rules
Outside Palmer and Wasilla, the Matanuska-Susitna Borough's Chapter 17.55 sets minimum setbacks: 25 feet from any public right-of-way (10 feet on small pre-existing lots or older nonconforming structures), and 10 feet from side and rear lot lines, under MSB § 17.55.010. Eaves may project up to three feet into the required setback.
Mat-Su Borough Yard Setback Minimums
Some RestrictionsMatanuska-Susitna Borough Code § 17.55.010
No structure or building line shall be placed within 25 feet from the right-of-way line of any public right-of-way, except no furthermost protruding portion of any structure shall be placed within ten feet from the right-of-way line of any public right-of-way when the pre-existing lot: ... This setback shall be known as the structure or building line setback. ... Except where specifically provi...
Structure Height Limits
In the borough outside Wasilla, Palmer and Houston, within the Denali State Park Special Land Use District, MSB § 17.17.090 caps building height at 35 feet above finished grade. The cap applies only inside this district's mapped boundaries along the George Parks Highway, not to the rest of unincorporated Mat-Su.
Matanuska-Susitna Borough Denali State Park Height Limit
Some RestrictionsMatanuska-Susitna Borough Code § 17.17.090
The maximum building height shall be 35 feet above finished grade.
Lot Coverage Limits
Multifamily developments in the Matanuska-Susitna Borough, outside Wasilla, Palmer and Houston, cannot cover more than 60 percent of the lot with impervious surface. The limit sits inside § 17.73.130's general design standards for multifamily projects, alongside perimeter setbacks of 25 feet front, 20 feet rear and 10 feet side, and 10-foot interior setbacks around detached garages and other accessory buildings.
Mat-Su Borough Multifamily 60% Lot Coverage Cap
Some RestrictionsMatanuska-Susitna Borough Code § 17.73.130(A)(1), (8)
No more than 60 percent of the lot area shall be occupied by impervious surface areas; ... Front: 25 feet; ... Rear: 20 feet; and ... Side: ten feet;
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