ZIP Code · PA

ZIP 18031

Part of Breinigsville, PA

Pop. 11,570·Lehigh County·16th most expensive ZIP in Pennsylvania

Median rent (all units)

$2,331/mo

Year-over-Year

+5.5%

Month-over-Month

+0.4%

vs US Median

+$399

Reported rents

Stable (Monthly)

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Most AffordableMost Expensive

ZIP 18031 · $2,331

More expensive than 75% of US ZIP codes · National median $1,932/mo

Rent check

Is your rent fair?

Compare your rent to the local median.

Medians by bedroom

Rent by unit size

Studio

$1,560

1 BR

$1,860

2 BR

$2,260

3 BR

$2,890

4 BR+

$3,040

Research median

$2,260/mo

Bedroom estimates are gross rents that include essential utilities (electricity, water, gas, sewer, trash).

Rent trends

12-month history

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Last updated: October 17, 2026

From the history

What the numbers show

Compared with the peak

Rent in ZIP 18031 is at its highest level since Zillow's records here began in October 2023.

Past year vs. the rest of Pennsylvania

Rent in ZIP 18031 changed +5.5% over the year to September 2026. Across the 205 Pennsylvania ZIP codes Zillow tracks, the typical change was +3.8%.

Recent direction

Rent has risen 6 months in a row, and rose in 9 of the last 12 months.

What a typical income covers

30% of the median household income ($113,625) is $2,841 a month. That covers HUD's Fair Market Rent for up to a 2-bedroom ($2,260); a 3-bedroom is $2,890.

Cheaper nearby

ZIP 18103, 8 miles away, rents for 28% less ($1,683/mo), about $7,800 a year in savings.

From Zillow's monthly rent index (ZORI) for ZIP 18031. Income is the Census median household income (5-year estimates). Fair Market Rents are HUD’s, which include utilities.

Annual cost

$27,972/yr

At $2,331/mo median

Location

CityBreinigsville

StatePA

CountyLehigh County

Rent Market Meter

Strong Landlord's Market

Renter's MarketBalancedLandlord's Market

Rents are up 5.5% year-over-year. Expect competition, and move quickly to lock in terms.

Based on rent-price momentum (+5.5% YoY, +0.4% MoM), not inventory.

Demographics

Who lives here

ZIP 18031 (Breinigsville, PA) is majority owner-occupied, has a large share of families with children, has a median income above the national average, 53.5% of residents hold a bachelor's degree or higher.

Population

11,570

Median income

$113,625

Median age

39.4

Renters

23.7%

Age distribution

26.6%

16.6%

28.7%

13%

15.2%

Under 1826.6%

18–3416.6%

35–5428.7%

55–6413%

65+15.2%

Gender

43.7%

56.3%

Male43.7%

Female56.3%

Race & ethnicity

62.1%

17.8%

13.6%

White62.1%

Black5.1%

Hispanic17.8%

Asian13.6%

Other1.4%

Education (25+)

21.2%

23%

53.5%

No HS diploma2.3%

HS diploma21.2%

Some college23%

Bachelor's+53.5%

Housing tenure

76.3%

23.7%

Owner76.3%

Renter23.7%

Source: U.S. Census Bureau · ACS 2024 5-Year Estimates

2021 vs 2026

How ZIP 18031 in Breinigsville, PA has changed in 5 years

Income

$91,006 → $113,625

up 24.9%

Population

11,882 → 11,570

down 2.6%

Renter share

25.9% → 23.7%

-2.2 pts

Bachelor's+

51.6% → 53.5%

+1.9 pts

Median age

37.2 → 39.4

+2.2 yrs

Household income in the area moved from $91,006 to $113,625 across the same window, up 24.9% versus 2021. Headcount in the area went from 11,882 to 11,570 between 2021 and 2024, a 2.6% change. About 23.7% of households rent today, against 25.9% in 2021.

Community

Discussions about ZIP 18031

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Local insights

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About renting in ZIP 18031

Last updated: October 17, 2026

ZIP code 18031 covers Breinigsville, PA. The median rent here is $2,331/mo as of October 2026. A 1-bedroom rents for a median of $1,860/mo. A 2-bedroom rents for a median of $2,260/mo.

At 25% of local median household income ($113,625/yr), ZIP 18031 ranks as affordable compared to the national benchmark of 30%. Rents have increased 5.5% over the past year.

FAQ

Frequently asked questions

How much income do you need to rent in ZIP 18031?

To keep rent at or below 30% of gross income, you would need to earn at least $93,000/year (about $45/hour full-time) to afford the median rent of $2,331/mo in ZIP 18031. The local median household income is $113,625/yr, so the typical household meets that bar.

Is rent going up or down in ZIP 18031?

Rent in ZIP 18031 has risen 5.5% over the past year as of September 2026. That is the highest level since Zillow's records here began in October 2023.

How does ZIP 18031 compare to other ZIPs in Pennsylvania?

ZIP 18031 is one of the pricier among Pennsylvania ZIP codes for rent, ranking #16 of 261 at $2,331/mo. Over the year to September 2026, rent in ZIP 18031 changed +5.5%, against a typical +3.8% across the 205 Pennsylvania ZIP codes Zillow tracks.