ADU Pass
Springfield Dpo 1
ADU Pass helps homeowners in Springfield Dpo 1 — a USPS locale inside Springfield, No County, Illinois — navigate the permit paperwork for building an accessory dwelling unit. This locale covers 1 ZIP code.
Springfield — city ADU rules and incentives
ADU legality: with-restrictions
no_county cross-listing for Springfield IL (Sangamon County seat). Permitting workflow, fees, contacts, climate, building code values are the same as the canonical Sangamon County file. Visitors arriving via no_county routing should treat the Sangamon County profile as authoritative for Springfield IL.
City cost envelope
$157,300 all-in for a 575 sqft ADU (permit + build). Midpoint scenario.
Permit fee bundle: $2,720 (2026-04).
City viability (selected uses)
City incentives
- Illinois Property Tax Assessment Freeze (canonical) — 8-year frozen assessment
County: no attribution (synthetic bucket)
No county
This city sits in the state's "no county" bucket — its ADU rules derive directly from state law and city ordinance without a county intermediary. No county-level sections apply.
Illinois state — ADU law and programs
State financing programs
Illinois does not operate an ADU-specific statewide loan, grant, or forgivable-loan program. The Illinois Housing Development Authority (IHDA) is the state's housing finance agency and administers a robust portfolio of homebuyer products: Access Forgivable, Access Deferred, Access Repayable down-payment-assistance variants, the IHDA Mortgage first-mortgage product, and the federal Low-Income Housing Tax Credit allocation. The 2025 IHDA Access Home program offers DPA equal to 6% of purchase price up to $15,000. None target ADU construction directly; an ADU-bearing primary residence on an Illinois lot can qualify for the underlying mortgage when other criteria are met.
Federal (United States) — ADU-relevant rules and programs
Federal ADU law
The United States has no federal statute that directly regulates accessory dwelling unit entitlement or design. Land-use authority over ADUs resides with states and local governments under the traditional police power. Federal engagement is limited to financing (Fannie/Freddie/FHA/VA/USDA), flood insurance (FEMA/NFIP), and discretionary housing programs (HUD), which are recorded in sibling sections of this file.
Federal financing programs
Federal housing-finance agencies and GSEs set nationwide underwriting rules that govern whether an ADU can be financed, appraised, and counted toward mortgage qualifying income. The relevant actors are Fannie Mae, Freddie Mac, FHA (HUD), VA, and USDA Rural Development.
Federal tax credits
There is no ADU-specific federal tax credit. ADUs may incidentally qualify for existing federal energy-efficiency and clean-energy tax credits when the ADU construction includes qualifying measures.
Federal housing programs
HUD administers several discretionary programs that can fund ADU-related activity at the grantee's election, but none is an ADU-specific program.
ZIP Code
- 62791
Post Office
- 1903 W Monroe St, 62704