Eagan, MN Fence Regulations: Retaining Walls (2026)

Eagan's City Code addresses retaining walls as part of its exterior-work completion rules in § 4.07, not as a stand-alone height or engineering standard: a retaining wall counts among the 'exterior structures' listed alongside accessory buildings, decks and fences that trigger the deadline once a building permit is issued for the work. Under § 4.07(A), any retaining wall built or altered under a permit issued in accordance with the Minnesota State Building Code must be finished within 180 days of permit issuance, or within a longer timeframe set by the city's chief building official at the time the permit is issued, whichever period is greater.

Eagan's protective inspections division, under the chief building official, administers this deadline; retaining walls sit in the same 180-day completion bucket as roof, siding, window and door replacements and new accessory structures, while brand-new home construction gets 365 days. If unavoidable delay prevents finishing on schedule, § 4.07(B) lets the property owner or permit holder ask the chief building official for one extension, capped at another 180 days, granted at the official's reasonable discretion; a second extension is not available under this section. Failing to complete the retaining wall, or any other listed exterior work, within the deadline, including any extension granted, is itself declared a violation of § 4.07(C).

Separately, § 4.07(D) voids the permit outright, 180 days after issuance, if no substantial work has begun, regardless of the completion clock. Homeowners building or replacing a retaining wall in Eagan should confirm both the building permit and its completion deadline with the city before starting work.