Chester County is the fastest-growing county in the region, and it is getting older at the same time: 18.7% of residents are 65 or older, per U.S. Census Bureau QuickFacts, and the share climbs every year. For longtime owners in West Chester, Exton, Kennett Square, and the western Main Line, that creates an unusually good setup: strong buyer demand for the family home, and the state’s single most famous downsizing destination a few miles away.
The Chester County downsizing picture
The county’s growth over the past two decades pulled in families who now compete hard for established single-family homes, especially in the Unionville-Chadds Ford, West Chester, and Downingtown school districts. Longtime owners selling here rarely lack an audience. The harder question is the destination, and Chester County answers it differently than its neighbors: instead of dozens of small scattered communities, one enormous one dominates.
Hershey’s Mill: a market of its own
Hershey’s Mill, outside West Chester, began construction in 1974 and is Pennsylvania’s oldest active adult community. The scale is hard to overstate: 25 villages, more than 1,700 homes, roughly 800 acres, an 18-hole golf course, a sports complex, over 35 clubs, and 24/7 gated security. Prices span from the mid $200s to over $700,000 depending on the village, which means it serves nearly every downsizing budget.
- Villages differ meaningfully. Newer construction and carriage-style homes cluster in some villages; the most accessible price points sit in the community’s historic core. Touring three or four villages is the only way to calibrate.
- Resale moves fast. A community this established has constant, predictable turnover, and well-priced homes attract multiple downsizers who have often been waiting for a specific village.
- One-floor living is the draw. Most homes offer first-floor primary suites, the thing the county’s regular housing stock almost never provides.
The rest of the county map
Beyond the Mill, the county’s frequently mentioned communities include the Villages at Hillview in western Chester County, often called the value pick among the larger active adult communities. Many Chester County downsizers also shop across the Delaware County line, where Fox Hill Farm in Glen Mills and the life-plan campuses around Media and Newtown Square widen the menu; our Delaware County guide covers those. And some conclude, once the math is on paper, that modifying the current house is the better plan; the age-in-place framework treats that as the legitimate option it is.
What the sale costs here
Most Chester County municipalities charge a total realty transfer tax of 2% of the sale price, customarily split evenly between buyer and seller. Commission, preparation, and municipal certificates follow the regional pattern in our cost-to-sell guide. Selling on the Main Line side of the county? The Tredyffrin township guide covers Wayne, Berwyn, and Paoli, where no municipal resale inspection is required at all, the West Chester Borough guide covers the county seat, including the historic district questions buyers ask, and the Uwchlan / Exton guide covers the township’s resale U&O inspection and its 30-day scheduling rhythm, and the Phoenixville guide explains the borough’s two-document process, a transfer permit plus a utilities certification, the Downingtown guide covers the $125 compliance certificate and the flood zone question, and the Kennett Square guide explains why the borough requires a U&O and the surrounding township requires none, and the Coatesville guide covers the city’s $125 resale inspection, the published checklist, and the as-is transfer path, and the Caln Township guide explains the $150 transfer certificate, its six-month validity, and the utility accounts the township checks first, and the Devon / Berwyn guide covers Easttown’s no-inspection resale and its open-permit trap, and the Malvern / Willistown guide explains why the borough inspects and the township does not, and the East Goshen guide covers the reinstated $150 transfer inspection and the Hershey’s Mill exception, and the West Goshen guide covers the largest West Chester suburb, where the township states in writing that no resale permit exists, and the East Bradford / East Caln guide pairs the township that retired its sewer inspection in 2019 with the one that checks the typeface on your mailbox numerals, and the Chester Springs and Kimberton guide covers Phoenixville’s three ring townships, where no inspector exists and the three-year septic record does the talking, and the Owen J. Roberts district guide walks all six townships from South Coventry’s $50 sidewalk certificate to East Vincent’s televised lateral with its thirty-day clock, and the Westtown guide explains the $100 certificate with a 60-day shelf life and the township’s no-grandfathering rule, and the East Whiteland / Frazer guide covers the $50 inspection that comes with its own published answer key, the West Whiteland guide covers Exton’s no-permit side of the line and the $40 sewer certification, and the Parkesburg guide explains Ordinance 528’s $200 permit at the county’s western edge, while down south the Oxford guide covers the $125 certificate gated by two utility certifications, the Honey Brook guide untangles a borough that inspects from a township that does not, and the West Grove / Avondale guide pairs a $75 transfer certificate with Avondale’s twenty-business-day rule, the London Grove guide covers the $52 permit on every transfer, and Kennett Township, Charlestown, and the Nottinghams all let homes pass without a certificate while their neighbors inspect. Out west, Atglen asks sellers for a $45 utility certification and nothing more, while South Coatesville and Modena split the difference: one publishes its U&O package, the other requires a call to the borough office. In the Avon Grove countryside, Penn, London Britain, and Franklin publish no resale certificates at all, north of Route 30 the Brandywine townships split between a posted no and a call-to-confirm, and along Marsh Creek the Upper Uwchlan and Wallace guide pairs a $100 resale inspection with a township that charges no municipal property tax at all. Around Coatesville, the Valley and Sadsbury guide contrasts a township that inspects every deed change with one that only steps in when the building holds a rental, the East Fallowfield and Newlin guide covers two townships that put their no-certificate answer in writing, and in the Octorara corner the Londonderry guide walks the $125 certificate and its published 20-item checklist while Highland and West Sadsbury require nothing. In Unionville country, the Pocopson, Pennsbury, Birmingham, and West Marlborough guide explains four townships with no resale certificates and one historic district review, and in the northern corner the Elverson and West Nantmeal guide contrasts a borough that asks nothing with a township whose $235 certificate wants proof the furnace was serviced this year. In the Unionville and Avon Grove countryside, East Marlborough and New London ask nothing at resale but hide a school district line that changes the paycheck math, and at the county’s far western edge, West Caln and the two Oxford townships range from no requirement at all to Lower Oxford’s $50 inspection of smoke alarms and reflective house numbers. On the income side, Pennsylvania generally does not tax the gain on a longtime primary residence, and the federal $250,000/$500,000 exclusion covers most households; details and exceptions live in the PA/NJ tax guide.
County resources worth knowing
The Chester County Department of Aging Services (610-344-6350, West Chester) is the county’s Area Agency on Aging, handling care management, Medicare counseling, caregiver support, and protective services. Pennsylvania’s Property Tax/Rent Rebate pays up to $1,000 a year to income-eligible residents 65 and older; our PTRR guide explains the half-of-Social-Security rule that qualifies more households than expected. When you want the number that anchors the whole plan, request a free valuation of the current house.