LatestCoverageAll 50 states, D.C. and five territories now on the ledger|NewPuerto Rico's 78 municipios ledgered, municipio by municipio|FeatureAssessment appeal workspace — build a filing package from your own evidence|FeatureLiving reports — versioned, re-runnable, exportable|DevelopersMetered REST gateway · issued keys · signed webhooks|Live market readings · refreshed on loadAlbuquerque · NMMedian List$360K+2.5%|Austin · TXMedian List$550K-1.0%|Baltimore · MDMedian List$225K-6.3%|Bernalillo County · NMMedian List$364K+2.7%|Bexar County · TXMedian List$303K+3.7%|Boston · MAMedian List$859K+3.4%|Charlotte · NCMedian List$430K-0.1%|Chicago · ILMedian List$426K+9.3%|Clark County · NVMedian List$447K+0.1%|Columbus · OHMedian List$300K+0.6%|Cook County · ILMedian List$348K+5.1%|Dallas · TXMedian List$449K-0.1%|Davidson County · TNMedian List$481K+0.1%|Denver · COMedian List$569K+1.6%|Detroit · MIMedian List$105K-2.8%|Duval County · FLMedian List$297K-2.3%|El Paso · TXMedian List$260K+3.7%|Fort Worth · TXMedian List$332K-2.1%|Franklin County · OHMedian List$320K+3.2%|Fresno · CAMedian List$406K-2.3%|Harris County · TXMedian List$327K+0.6%|Houston · TXMedian List$340K+0.6%|Indianapolis · INMedian List$260K+2.3%|Jackson County · MOMedian List$275K+7.0%|Jacksonville · FLMedian List$309K-2.1%|Jefferson County · KYMedian List$248K-4.3%|Kansas City · MOMedian List$240K+4.3%|King County · WAMedian List$860K-4.2%|Las Vegas · NVMedian List$440K-1.1%|Los Angeles · CAMedian List$950K-0.5%|Louisville · KYMedian List$275K0.0%|Maricopa County · AZMedian List$458K-0.4%|Marion County · INMedian List$259K+3.7%|Mecklenburg County · NCMedian List$407K-5.3%|Memphis · TNMedian List$202K+2.5%|Mesa · AZMedian List$450K-3.1%|Milwaukee · WIMedian List$243K+5.7%|Multnomah County · ORMedian List$518K-1.2%|Nashville · TNMedian List$480K+1.0%|New York · NYMedian List$899K+0.5%|Oklahoma City · OKMedian List$275K-0.6%|Oklahoma County · OKMedian List$259K-0.7%|Philadelphia · PAMedian List$249K+0.3%|Phoenix · AZMedian List$480K0.0%|Pima County · AZMedian List$373K+0.9%|Portland · ORMedian List$640K-6.0%|Sacramento · CAMedian List$510K+4.0%|San Antonio · TXMedian List$236K-1.2%|San Diego · CAMedian List$994K+4.2%|San Francisco · CAMedian List$1.4M+1.7%|San Jose · CAMedian List$1.3M-11.9%|Santa Clara County · CAMedian List$1.3M+0.1%|Seattle · WAMedian List$874K-2.8%|Shelby County · TNMedian List$259K-2.4%|Suffolk County · MAMedian List$857K+7.3%|Tarrant County · TXMedian List$385K-1.2%|Travis County · TXMedian List$523K-0.3%|Tucson · AZMedian List$316K+2.7%|Wayne County · MIMedian List$229K+6.7%|LatestCoverageAll 50 states, D.C. and five territories now on the ledger|NewPuerto Rico's 78 municipios ledgered, municipio by municipio|FeatureAssessment appeal workspace — build a filing package from your own evidence|FeatureLiving reports — versioned, re-runnable, exportable|DevelopersMetered REST gateway · issued keys · signed webhooks|Live market readings · refreshed on loadAlbuquerque · NMMedian List$360K+2.5%|Austin · TXMedian List$550K-1.0%|Baltimore · MDMedian List$225K-6.3%|Bernalillo County · NMMedian List$364K+2.7%|Bexar County · TXMedian List$303K+3.7%|Boston · MAMedian List$859K+3.4%|Charlotte · NCMedian List$430K-0.1%|Chicago · ILMedian List$426K+9.3%|Clark County · NVMedian List$447K+0.1%|Columbus · OHMedian List$300K+0.6%|Cook County · ILMedian List$348K+5.1%|Dallas · TXMedian List$449K-0.1%|Davidson County · TNMedian List$481K+0.1%|Denver · COMedian List$569K+1.6%|Detroit · MIMedian List$105K-2.8%|Duval County · FLMedian List$297K-2.3%|El Paso · TXMedian List$260K+3.7%|Fort Worth · TXMedian List$332K-2.1%|Franklin County · OHMedian List$320K+3.2%|Fresno · CAMedian List$406K-2.3%|Harris County · TXMedian List$327K+0.6%|Houston · TXMedian List$340K+0.6%|Indianapolis · INMedian List$260K+2.3%|Jackson County · MOMedian List$275K+7.0%|Jacksonville · FLMedian List$309K-2.1%|Jefferson County · KYMedian List$248K-4.3%|Kansas City · MOMedian List$240K+4.3%|King County · WAMedian List$860K-4.2%|Las Vegas · NVMedian List$440K-1.1%|Los Angeles · CAMedian List$950K-0.5%|Louisville · KYMedian List$275K0.0%|Maricopa County · AZMedian List$458K-0.4%|Marion County · INMedian List$259K+3.7%|Mecklenburg County · NCMedian List$407K-5.3%|Memphis · TNMedian List$202K+2.5%|Mesa · AZMedian List$450K-3.1%|Milwaukee · WIMedian List$243K+5.7%|Multnomah County · ORMedian List$518K-1.2%|Nashville · TNMedian List$480K+1.0%|New York · NYMedian List$899K+0.5%|Oklahoma City · OKMedian List$275K-0.6%|Oklahoma County · OKMedian List$259K-0.7%|Philadelphia · PAMedian List$249K+0.3%|Phoenix · AZMedian List$480K0.0%|Pima County · AZMedian List$373K+0.9%|Portland · ORMedian List$640K-6.0%|Sacramento · CAMedian List$510K+4.0%|San Antonio · TXMedian List$236K-1.2%|San Diego · CAMedian List$994K+4.2%|San Francisco · CAMedian List$1.4M+1.7%|San Jose · CAMedian List$1.3M-11.9%|Santa Clara County · CAMedian List$1.3M+0.1%|Seattle · WAMedian List$874K-2.8%|Shelby County · TNMedian List$259K-2.4%|Suffolk County · MAMedian List$857K+7.3%|Tarrant County · TXMedian List$385K-1.2%|Travis County · TXMedian List$523K-0.3%|Tucson · AZMedian List$316K+2.7%|Wayne County · MIMedian List$229K+6.7%|
Property-class scope

The story of this market

The typical home in ZIP 21155 sells for about $549,078, or $235 per square foot.

Prices are up +1.7% from a year ago, so sellers still have some momentum. Homes take about 32 days to sell. HUD's fair market rent for a two-bedroom is $1,513 a month.

ZIP market report · consumer edition · quarterly refresh
Track this ZIP

ZIP 21155 — Upperco

Baltimore County →refreshed Sep 30, 20262 cycles retainednext refresh Oct 30, 2026
Market mood · cautiously optimistic

The housing market in 21155 remains stable with low inventory and steady price appreciation. Demand is driven by buyers seeking rural space within reach of Baltimore, though limited supply keeps the market competitive.

Who this ZIP fits

This ZIP is best suited for families and individuals seeking a rural lifestyle, privacy, and larger lot sizes, while remaining within commuting distance of Baltimore County employment hubs.

Parent geography
Upperco · no city intel reportBaltimore County →Maryland state →
Aerial view · ZIP boundaries2020 Census ZCTA boundary over current aerial imagery
Leaflet Imagery © Esri, Maxar, Earthstar Geographics
Land area · 57.3 km²Water area · 0.2 km²U.S. Census Bureau TIGERweb — 2020 Census ZCTA5 boundary
Median sale price
$549,078
+1.7% year over year
Corroborated · 1 anchor · 0% off nearest
Days on market
32 days
Active listings
48
Listings with price cuts
18%
share of active listings
Sale-to-list ratio
98.5%
of asking price
ZIP Market ScoreZIP-SCORE-1.3 · 4/4 sections graded
76
Composite · average of graded sections
Computed only from this report's published readings — sections without data are excluded, never estimated.
59
Growth/100

Median prices moved up 1.7% year over year.

78
Liquidity/100

Homes spend a median of 32 days on market with 3.5 months of supply — a fast-moving market.

70
Momentum/100

18% of listings have cut prices · homes sell at 98.5% of asking — demand is running ahead of supply.

95
Safety & stability/100

no recorded foreclosure-ledger notices (0.0 per 10,000 residents) · unemployment 3.0% · poverty 5.2% — a stable, low-distress profile.

Median price · ten-year history

Researched annual trajectory for this ZIP, from published historical series

2016201720182019202020212022202320242025202620282030$375,000$450,000$525,000$600,000$675,000

Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 4.0%/yr trend — a deterministic estimate, not a published forecast or guarantee.

Property tax · ten-year history

Median annual property tax paid on this ZIP's residential parcels

2016201720182019202020212022202320242025202620282030$3,800$4,750$5,700$6,650$7,600

Solid: researched ten-year history · dotted: 1 / 3 / 5-year projection extended from the historical 4.7%/yr trend — a deterministic estimate, not a published forecast or guarantee.

Census trends · population flowsACS 2019-2023 5-year estimates
Population change
+0.4%

versus the prior ACS vintage

Net migration
+15 people

net influx — more people moved in than out

Population base
3,313

ZCTA 21155, Baltimore County MD

Area context
Crime & safety

Crime rates in the Upperco area are generally low, consistent with the rural character of northern Baltimore County and significantly lower than the regional urban averages.

Schools & education

Schools serving the area are part of the Baltimore County Public Schools system, which generally maintains a stable reputation with several highly rated elementary and middle school options in the surrounding region.

Environmental & hazard

The area is primarily rural with low flood risk, though property insurance premiums are influenced by regional wildfire and wind exposure common to the Mid-Atlantic climate.

Growth & development

Economic momentum is driven by proximity to the Baltimore-Towson employment corridor, with development primarily focused on low-density residential expansion and agricultural preservation.

Taxation

Composed from the ARED governance burden registry — tier-native tax structure (state + county + city + special districts), never averaged. State (Maryland) — Maryland Real Property Assessment and Taxation: Property is assessed at its phased-in use value. The tax is calculated by multiplying the assessed value by the applicable state and local tax rates.

Transportation & commute

Commuting typically requires personal vehicle use, with residents driving toward the Baltimore beltway or Towson for major employment centers.

Recreation & amenities

The area offers access to rural landscapes, local parks, and equestrian trails, with limited high-density shopping or entertainment venues within a 3-mile radius.

Rental market

The rental market is limited in depth, consisting primarily of single-family home rentals with low turnover and minimal short-term rental saturation.

Economy & employers

The local economy is anchored by agriculture, small businesses, and professional services, with most residents commuting to the broader Baltimore metropolitan area.

Transportation & infrastructure

Public transit is virtually non-existent; the area is entirely dependent on private vehicle infrastructure.

Development pipeline

Development is strictly managed by rural zoning and agricultural preservation easements, limiting large-scale commercial or residential projects.

County appraisal district

Baltimore County utilizes a triennial assessment cycle for property tax purposes.

Special districts

Parcels are subject to standard county-level school and municipal tax levies without significant special district overlays.

Insurance & hazard market

Property insurance markets remain stable, though premiums are sensitive to regional weather-related risk factors.

Migration & population flows

Maryland has experienced modest net domestic migration shifts, with rural areas like Baltimore County seeing stable long-term residency.

Foreclosure doctrine

Maryland is a judicial foreclosure state, requiring court intervention for the foreclosure process.

Disclosure doctrine

Maryland law requires sellers to provide a residential property disclosure statement covering the condition of the home's major systems.

Discovery profileACS 2019-2023 5-year estimates
Census profile · ZCTA 21155, Baltimore County MD
Population
3,313
Median age
33.7 yrs
Owner-occupancy
92.1%
Median home value
$549,078
Median gross rent
$2,150
Median household income
$98,450
Median year built
1967
Vacancy rate
3.5%
Renter share
7.9%
Owner cost burden
22.4%
Renter cost burden
31.2%
Population change
+0.4%
Net migration
15
Work-from-home share
18.5%
Mean commute
38.5 min
Bachelor's or higher
42.1%
Unemployment
3%
Poverty rate
5.2%
Avg household size
2.7
White
94.5%
Hispanic
2.1%
Black
1.2%
Other
2.2%

Data retrieved from data.census.gov ZCTA 21155 profile.

Public schools with an address here · 2

Public schools whose reported address is in this area (NCES). Not attendance boundaries — schools that serve residents may sit outside it. Check the district's address locator for assignment.

Hereford High SchoolHigh9/10Baltimore County Public SchoolsHighly regarded public high school serving the northern county.
Seventh District ElementaryElementary8/10Baltimore County Public SchoolsLocal elementary school with strong community ratings.
School districts
Baltimore County Public SchoolsB+Large district serving the entire county with varied performance across regions.
Utilities & services
ElectricBGEPrimary provider in the region.
InternetXfinity/VerizonBroadband availability varies by specific location.
Water/SewerPrivate/Well/SepticMost properties rely on private well and septic systems.
Major employers & industries
Baltimore County GovernmentPublic SectorMajor regional employer.
Local Agricultural EnterprisesAgricultureSignificant local land use and economic contributor.
Major amenities · ZIP 21155
Theme, amusement & water parks
12 · 20 mi
Entertainment venues, stadiums & amphitheaters
14 · 20 mi
Family fun & things to do
20+ · 13 mi
Museums, galleries & history
13 · 20 mi
Parks, trails & nature
15 · 13 mi
Shopping & dining districts
11 · 13 mi

Theme parks, venues, golf, airports, museums, water and shopping across the area from Google Maps, ranked by popularity within the radius shown.

Amenities & attractions2 retained amenities
Inside this ZIP
Prettyboy Reservoir
Park/Waterfront

Provides extensive hiking, fishing, and scenic views.

Gunpowder Falls State Park
Park

Large state park offering trails and outdoor recreation.

Sources · 3 cited

Key-figure check: median price diverges 35.4% from the nearest retained anchor (prior refresh cycle) — beyond the 12.5% tolerance; an automated validation case is open and the value publishes pending its verdict. Validation: confirmed genuine market swing — the flagged $549,078 was independently re-read and corroborated by 2 source(s); it stands as the new anchor baseline.