Mat-Su Planning Commission backs multifamily code overhaul

Matanuska-Susitna Borough homeowners can add a mother-in-law suite without a permit regardless of lot size, while larger multifamily projects must meet new drainage, fire-access, and road-distance requirements under a code overhaul the Mat-Su Borough Planning Commission recommended Monday.

The commission advanced the tiered system to the Mat-Su Borough Assembly for final action.

Larger projects face additional requirements under the new rules, including stamped engineering plans and a requirement that all exterior building walls sit within 100 feet of a vehicular circulation road, a standard derived from fire-code principles. For developments above 10 dwelling units, roads must be built to Pioneer standards and comply with subdivision construction manual requirements.

Planning Director Alex Strawn said the code also resolves a longstanding mismatch in how the borough handles condominium plats. "We have been processing multi-family development permits for these condo plats, and it's kind of a square peg in a round hole type situation," Strawn said. Under the new rules, condo units larger than 40,000 square feet are treated as standard parcels. The ordinance also updates exterior-lighting standards, replacing a strict glare-containment rule with a requirement for downward directional shielding.

Strawn acknowledged the concern. "Any rule that you write has unintended consequences, no matter how well it's written or how well-intended you are when you write it. There's always unintended consequences and there's always loopholes to be found," he said.

The Mat-Su Borough Assembly must still act on the underlying ordinance before the new standards take effect.