Choosing the right mortgage is one of the most consequential financial decisions in a home purchase — and in Illinois, where Cook County property taxes rank among the highest in the nation, the loan type you select affects not just your interest rate but your total monthly housing cost, how much home you can actually afford, and how much cash you need to close. This guide explains the major mortgage options available to Illinois home buyers in the Chicago south suburbs and how to evaluate which makes the most sense for your situation.
Conventional Loans
Conventional loans are mortgages that meet Fannie Mae and Freddie Mac guidelines — not government-backed, but conforming to standards that allow them to be sold on the secondary mortgage market. They are the most flexible and widely used mortgage type for south suburban buyers.
Key Features
- Down payment: As low as 3% (first-time buyers) to 5% for repeat buyers; 20% eliminates Private Mortgage Insurance (PMI)
- Credit score: Minimum typically 620; better rates at 740+
- PMI: Required with less than 20% down; automatically cancels at 80% loan-to-value based on original purchase price (or sooner with documented equity growth)
- Loan limit (2025): $806,500 for most areas (including Cook and Will County); above this is a jumbo loan
- Best for: Buyers with strong credit (700+) who want flexibility, can meet the down payment requirement, and want to avoid FHA’s upfront mortgage insurance premium
Conventional loans offer the widest range of term options (10, 15, 20, 30 year) and the broadest range of lender options. In a competitive south suburban market, sellers and listing agents often perceive conventional financing as slightly stronger than FHA offers, all else equal — because conventional appraisals have fewer condition-based requirements than FHA appraisals.
FHA Loans
FHA loans are insured by the Federal Housing Administration, which allows lenders to offer more favorable terms to buyers with lower credit scores or smaller down payments.
Key Features
- Down payment: 3.5% with 580+ credit score; 10% with 500–579 credit score
- Credit score: 500 minimum (580 for 3.5% down)
- Mortgage Insurance: Upfront MIP of 1.75% of loan amount (added to loan balance) plus annual MIP of 0.55%–1.05% depending on loan terms. For loans with less than 10% down, MIP lasts for the life of the loan — a meaningful long-term cost.
- Loan limit (2025): $524,225 for Cook and Will County single-family homes
- Property condition requirements: FHA appraisals include condition checks — properties with significant safety issues (peeling paint on pre-1978 homes, exposed wiring, broken windows, etc.) may fail FHA appraisal, limiting your options on distressed properties
- Best for: First-time buyers with limited down payment savings, buyers with credit scores in the 580–680 range, or buyers who need the flexibility of lower qualification thresholds
VA Loans
VA loans are available to eligible veterans, active-duty service members, and surviving spouses. They are guaranteed by the Department of Veterans Affairs and are one of the strongest mortgage products available for qualifying buyers.
Key Features
- Down payment: 0% — no down payment required
- PMI: None — VA loans have no ongoing mortgage insurance
- Funding fee: A one-time VA funding fee (typically 1.25%–3.3% depending on down payment and whether it’s a first or subsequent use) applies but can be rolled into the loan; waived for veterans with service-connected disabilities
- Credit score: No official VA minimum; most lenders require 620+
- Loan limit: No cap for eligible borrowers with full entitlement
- Best for: Eligible veterans and service members — if you qualify, VA should almost always be your first choice
VA loans have condition requirements similar to FHA (minimum property conditions must be met), and some sellers are less familiar with VA transactions. An experienced VA-knowledgeable agent and lender can navigate any misconceptions and make your VA offer competitive.
USDA Loans
USDA loans are guaranteed by the U.S. Department of Agriculture for properties in eligible rural and suburban areas. In the Chicago south suburban region, USDA eligibility is limited — most Cook County communities do not qualify, but some outer Will County communities (Crete, Steger, and similar fringe areas) may include USDA-eligible parcels. Eligibility is determined by property location and buyer income limits.
Key Features
- Down payment: 0% — no down payment required for eligible properties and buyers
- Income limits: Household income must not exceed 115% of area median income; limits vary by county and household size
- Guarantee fee: Upfront 1% fee plus 0.35% annual fee
- Check eligibility: Use the USDA eligibility map at eligibility.sc.egov.usda.gov to verify any specific address
Illinois Housing Development Authority (IHDA) Programs
The Illinois Housing Development Authority offers down payment assistance and first-time buyer programs that layer on top of conventional, FHA, or VA loans. Key IHDA programs include:
- Access Forgivable — provides 4% of purchase price (up to $6,000) as a forgivable second mortgage for down payment and closing cost assistance; forgiven over 10 years if the buyer remains in the home
- Access Deferred — 5% of purchase price (up to $7,500) as a deferred 0% interest loan, repaid when the home is sold or refinanced
- Access Repayable — 10% of purchase price (up to $10,000) as a repayable 0% second mortgage with a 10-year term
IHDA programs have income limits, purchase price limits, and credit score requirements. Not all lenders offer IHDA products — work with an IHDA-approved lender if you want to explore these options. Income and purchase price limits are adjusted periodically, so verify current limits with an approved lender.
Fixed vs. Adjustable Rate Mortgages
Most south suburban buyers choose 30-year fixed-rate mortgages — the rate is locked for the loan’s life, monthly payments are predictable, and the long amortization period keeps payments manageable. 15-year fixed mortgages offer significantly lower interest rates but substantially higher monthly payments; they make sense for buyers who can handle the higher payment and want to build equity faster. Adjustable-rate mortgages (ARMs) offer lower initial rates that adjust after a fixed period (5/1, 7/1, or 10/1 ARM); they can make sense for buyers who are confident they’ll sell or refinance before the adjustment period, but carry payment uncertainty risk if circumstances change.
Need help navigating mortgage options for your south suburban home purchase? Contact Krembo Group — we work with experienced local lenders and can connect you with professionals who know the south suburban market.
More Illinois Home Buying Guides
Browse our complete library of Illinois home buying resources, or contact Dan Krembuszewski at 708-921-0035 for personalized guidance in the Chicago South Suburbs.
