Old Mill Park, Sycamore — True Cost of Ownership

Old Mill Park is one of only two 55+ communities in the Chicago market located in DeKalb County. Every other community in this guide sits in Cook, DuPage, Kane, Will, Lake, McHenry, or Kendall County. DeKalb County's effective property tax rate of ~2.3% is roughly in line with Kane and Kendall — not dramatically cheaper, but not Lake County either. What DeKalb delivers is something the collar counties have mostly lost: genuine small-town character. Sycamore is the DeKalb County seat, with a working downtown square, independent businesses, and a community scale that feels categorically different from Naperville or Hoffman Estates.

Why buyers choose Sycamore: The buyers at Old Mill Park are typically choosing Sycamore's lifestyle over the collar county alternative — they want a real downtown they can walk to, neighbors who know each other, and a pace of life that the fast-growing outer suburbs have traded away. Home prices in the $175K–$290K range are among the lowest in the Chicago 55+ market, and the DeKalb County tax rate produces manageable annual bills. The tradeoff is distance from Chicago (roughly 60 miles) and fewer large-metro medical options than collar county communities.

Monthly Cost Breakdown

Cost Item	Est. Monthly (Low)	Est. Monthly (High)	Notes
HOA fee	$165	$185	Common areas and amenities; verify inclusions
Property tax	$336	$557	DeKalb ~2.3%; on $175K–$290K homes
Lawn care	$60	$105	Owner responsibility
Homeowners insurance	$90	$140	Lower home values; full structure coverage
Utilities	$165	$245	Not in HOA
Total monthly (excl. mortgage)	~$816	~$1,232

DeKalb County Tax by Home Value

Purchase Price	Annual Tax Est.	Monthly
$175,000	$4,025	$335
$215,000	$4,945	$412
$255,000	$5,865	$489
$290,000	$6,670	$556

DeKalb County assesses at 33.33% of market value, effective rate ~2.3%. Senior Assessment Freeze (SCAFP) at 65+ with income under $65K — annual re-application required with DeKalb County Assessor.

10-Year Projection — $220K Home

Cost Item	10-Year Estimate
HOA fees (3% annual increase from $175/mo)	~$24,300
Property tax (~$5,060/yr)	~$52,600
Lawn care (~$80/mo)	~$9,600
Insurance (~$113/mo)	~$13,600
Utilities (~$202/mo)	~$24,200
Total non-mortgage cost (10 yr)	~$124,300

Questions on Old Mill Park?

Connect with a DeKalb County buyer agent for current listings at Old Mill Park and its Sycamore neighbor Somerset Farms.

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