Knock Score™
C−
Top 79% of U.S. ZIPs
41 / 100
49880 · Rock, MI
Ranked #16,605 of 21,191 ZIPs in America
#804 of 845 MI ZIPs · top 96% in the state
KNOCKNOW — Know before you knock · knocknow.co/score
Knock Score™ · Door-to-door sales rating
How knockable is 49880?
Scores refresh weekly · updated 2026-11-02
Rock’s 49880 earns a Knock Score of 41/100 (C−), ranking #16,605 of 21,191 ZIP codes in America and #804 of 845 in MI (top 96% in the state). That's below-average territory — every set here is earned. Standouts: 99% carry high equity and 100% have no HOA in the way. The Score rates the ZIP — the KnocKnow app shows the exact zones inside it where 70%+ of homes match your perfect customer.
Show your work
How the 41 was built
Owner-occupancy51% of homesbeats 16% of ZIPs × 30% weight4.7 pts
Ability to payequity · paid-off · price blendbeats 78% of ZIPs × 25% weight19.5 pts
Door density4 homes/sq mibeats 4% of ZIPs × 20% weight0.8 pts
No-HOA share100% of homesbeats 75% of ZIPs × 15% weight11.3 pts
Aging homes89% of homesbeats 45% of ZIPs × 10% weight4.5 pts
Knock Score
41 / 100 · C−
Each ingredient is ranked against every scoreable ZIP in America; the grade is the curve (A− = top 10%, B+ = top 20%, …).
The breakdown
What's behind the C−
Owner-occupied51%
Owners answer the door and can say yes. Renters can't buy what you're selling.
No HOA100%
Fewer gates, fewer no-soliciting boards, no HOA approval standing between a yes and an install.
High equity99%
Homes with serious equity — owners who can finance a project without blinking.
Free & clear93%
Paid-off homes. No mortgage, maximum flexibility to spend.
Built 20+ years ago89%
Homes 20+ years old need roofs, systems, and upgrades — the stuff you sell.
4homes per sq mi
$135,487median value*
954homes scored
*Inflation-adjusted from recent sales. Built on data covering every home in the U.S., updated regularly.
How grades work
Every ZIP in America, on one curve
Each metric is ranked against every other scoreable ZIP nationally, then weighted: owner-occupancy 30%, ability to pay 25%, door density 20%, no-HOA share 15%, aging homes 10%.
A+top 1%Atop 5%A−top 10%B+top 20%Btop 35%B−top 50%C+top 65%Ctop 78%C−top 88%Dtop 97%Fbottom 3%
ZIP-level aggregates only — no individual home data is ever shown. ZIPs with fewer than 500 scoreable single-family homes aren't scored.
See the zones inside this ZIP
The Score rates the ZIP. The app paints the exact neighborhoods inside it where 70%+ of homes match your perfect customer — before you burn a tank of gas finding out.
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