Linn County at a Glance
Cedar Rapids is Iowa's second-largest city with a strong and diversified economy — Collins Aerospace (aerospace electronics), TE Connectivity, Quaker Oats, and a growing tech sector. Coe College and Mount Mercy University provide an educational anchor. The city has rebuilt significantly since the 2008 flood and continues to invest in flood mitigation infrastructure — but flood zone verification remains the most important due diligence step for any Cedar Rapids parcel near the river.
The 2008 Cedar River flood was one of the most destructive in Iowa history. Cedar Rapids saw over 10 square miles flooded — roughly 14% of the city — affecting thousands of homes and businesses. While the city has made substantial flood mitigation investments since 2008 (including a flood control system and property buyouts), significant flood risk remains for parcels adjacent to the river and its tributaries.
Flood zone status directly affects what happens if you receive a deed. Properties in FEMA Special Flood Hazard Areas face mandatory flood insurance requirements on any financed resale, limiting your buyer pool and exit options. Some flood-zone Cedar Rapids parcels have been difficult to sell for years after the 2008 event. The city has acquired hundreds of properties in the most vulnerable areas through buyout programs — some of those parcels may still appear in tax sale lists with complications.
Before registering interest in any Linn County parcel near the Cedar River: Pull the FEMA FIRM for the parcel coordinates. Check the City of Cedar Rapids Flood Risk Map, which is more granular than the federal FEMA tool and reflects the most recent flood control infrastructure. Verify whether the property has been subject to a city acquisition offer or is within the flood control project footprint. A parcel with apparent value in the assessor's database may be in a buyout zone with no practical resale market.
The best individual investor parcels in Linn County are outside the Cedar River flood corridor. Northwest Cedar Rapids (near Collins Aerospace), northeast Cedar Rapids residential neighborhoods, the Marion and Hiawatha suburbs, and rural Linn County agricultural parcels represent the strongest collateral with the least flood risk. These areas have strong employment anchors, stable property values, and high redemption rates.
For investors who want the full 24% return with redemption as the likely outcome, focus on stable suburban and near-suburban residential parcels on the eastern and western sides of the city — away from the river. For investors comfortable analyzing deeper risk, certain post-flood rebuilt neighborhoods offer higher certificate amounts with strong underlying replacement value for properties that have been elevated or rebuilt to current flood standards.
How Linn County Tax Lien Sales Work
Rotational Assignment
Linn County holds its annual tax sale in June. Register interest in target parcels with the Linn County Treasurer before the registration deadline. The delinquent parcel list is published in local media and on the treasurer's website. Certificates are assigned by rotational format where multiple investors register for the same parcel. No deposit required in most years — confirm with treasurer.
24% Annual — Full Rate
All Linn County certificates earn 24% per year at 2% per month. No bid-down format. Interest begins accruing from the date of sale. The Linn County Treasurer issues a certificate confirming your lien. You may pay subsequent year taxes during the 21-month period to add to your balance at the same 24% rate. Keep meticulous records of payments and dates.
21 Months — Cedar River Check First
Owners have 21 months to redeem at your certificate balance plus 24% annual interest. After 21 months, apply for a tax deed with proper notice. Before applying for a deed on any river-adjacent parcel, verify flood zone status and the city's current flood control project status — the city's acquisition rights may complicate your deed. Iowa Code § 448 governs the deed process.
Key Details
| County seat | Cedar Rapids — Iowa's second-largest city, home of Collins Aerospace |
| Population | 226,706 (2020 Census) — 2nd most populous county in Iowa |
| Sale timing | Annual — June; confirm exact date with Linn County Treasurer each year |
| Sale format | Rotational assignment — no competitive bidding on rate |
| Interest rate | 24% per annum — 2% per month from sale date — Iowa Code § 447.1 |
| Redemption period | 21 months from date of sale — Iowa Code § 447.9 |
| Subsequent taxes | May be paid by certificate holder, earning 24% on additional amounts |
| Critical diligence | Cedar River flood zone — verify FEMA FIRM and City of Cedar Rapids flood risk map before registering any river-adjacent parcel |
| Tax deed path | Apply to Linn County Treasurer after 21-month period with notice to owner — Iowa Code § 448 |
| County Treasurer | 319-892-5400 · linncounty.org → |
| Statute | Iowa Code § 446 → · § 447 → · § 448 → |
Research Tools for Linn County
Linn County Treasurer
Annual sale schedule, delinquent parcel list, registration requirements, and certificate issuance. Start here each June cycle for current procedures.
linncounty.org →Linn County Assessor
Assessed values, property characteristics, ownership records, and land use classification. Cross-reference with the delinquent list to evaluate certificate collateral value.
Linn County Assessor →Cedar Rapids Flood Risk Map
More granular than FEMA national data — reflects current flood control infrastructure and Cedar River flood risk by parcel. The most important single resource for Linn County investors.
Cedar Rapids Flood Map →FEMA Flood Map Service
Official FEMA FIRM designations for flood zone classification. Use alongside the Cedar Rapids local map — federal designation controls mandatory flood insurance requirements on financed resale.
FEMA Flood Maps →Linn County Recorder
Deeds, mortgages, and recorded instruments. Research prior encumbrances on any parcel where you plan to pursue a deed after redemption expires.
Linn County Recorder →Linn County GIS
Parcel boundaries, aerial imagery, and property data. Use to verify location relative to river corridors and assess condition of surrounding properties.
Linn County GIS →City of Cedar Rapids Permits
Building permits, code violations, and occupancy records for Cedar Rapids addresses. Post-flood rebuilds may have permit histories worth reviewing before registering interest.
Cedar Rapids Permits →Iowa DNR Environmental Sites
Contaminated site records and UST registrations. Check commercial or former industrial parcels — Collins Aerospace corridor and older manufacturing sites may have environmental history.
Iowa DNR Sites →City of Cedar Rapids Buyout Program
Tracks properties acquired or offered acquisition by the city after the 2008 flood. Some parcels in buyout zones may appear in tax sale lists — verify acquisition status before registering.
CR Buyout Program →Cedar Rapids Area Association of Realtors
Current market data for Linn County — median prices and days on market by neighborhood. Verify resale assumptions for any parcel where you may pursue a tax deed.
CRAAR Stats →Iowa Code § 446 — Tax Sale
Governing statute for Iowa's annual tax sale procedure, registration, assignment, and certificate issuance.
Iowa Code § 446 →Iowa Code § 448 — Tax Deed
Tax deed application process, notice requirements, and deed issuance by the county treasurer after the 21-month redemption period.
Iowa Code § 448 →Model Linn County lien returns before you register
Use the LTV Calculator to project 24% annual returns and the Parcel Tracker to log flood zone status, city acquisition flags, and redemption deadlines for each Linn County certificate.