How old are the homes in Mendham Township, NJ?
56.0% (±11.5 points) of the homes in Mendham Township, NJ were built before 1980 (2020–2024 American Community Survey).
9.7% were built before 1940.
4.6% were built in 2010 or later.
Figures last updated on .
- Built before 1980
- 56.0% (±11.5 points)
- Built before 1940
- 9.7%
- Built 2010 or later
- 4.6%
When the homes in Mendham Township were built
| Year built | Mendham Township | Morris County | New Jersey | United States |
|---|---|---|---|---|
| 2020 or later | 0.0% (±2.1 points) | 0.9% | 1.1% | 2.0% |
| 2010 to 2019 | 4.6% (±3.3 points) | 5.2% | 6.2% | 9.4% |
| 2000 to 2009 | 14.4% (±11.5 points) | 7.5% | 9.2% | 13.6% |
| 1990 to 1999 | 12.3% (±3.9 points) | 11.3% | 8.9% | 12.4% |
| 1980 to 1989 | 12.7% (±5.3 points) | 12.6% | 11.8% | 12.9% |
| 1970 to 1979 | 16.4% (±6.4 points) | 13.5% | 12.3% | 14.2% |
| 1960 to 1969 | 16.6% (±5.9 points) | 16.0% | 12.8% | 9.9% |
| 1950 to 1959 | 9.3% (±3.6 points) | 14.7% | 13.8% | 9.5% |
| 1940 to 1949 | 4.0% (±4.6 points) | 5.8% | 6.5% | 4.4% |
| 1939 or earlier | 9.7% (±4.7 points) | 12.4% | 17.4% | 11.7% |
In Mendham Township, the share of homes built before 1980 is not measurably different from Morris County (62.4%).
It is not measurably different from New Jersey (62.8%).
It is not measurably different from the national figure (49.7%).
In Morris County, Mendham Township ranks 31 of 39 places with a published estimate, from highest to lowest share of homes built before 1980.
Statewide, it ranks 408 of 564.
Rankings use the estimates alone; where margins of error overlap, neighboring ranks may not truly differ.
Why the age of a home matters: lead-based paint
Federal law treats housing built before 1978 as likely to contain lead-based paint.
Before a lease or sale of most pre-1978 housing, the landlord or seller must disclose any known lead-based paint and hazards and give the tenant or buyer the EPA pamphlet (42 U.S.C. § 4852d; 40 CFR part 745, subpart F; 24 CFR part 35, subpart A).
A contractor paid to renovate, repair or paint a pre-1978 home must be a certified firm, use a certified renovator and follow lead-safe work practices under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E) whenever the job disturbs more than 6 square feet of painted surface in a room or more than 20 square feet outside; window replacement and demolition always count (40 CFR 745.83).
Certification comes from EPA, or from the state where EPA has authorized the state to run the program.
The Census Bureau groups construction by decade, so the share built before 1978 lies between the share built before 1970 (39.6%) and the share built before 1980 (56.0%).
- 40 CFR part 745: Lead-based paint poisoning prevention in certain residential structures (eCFR)
- 24 CFR part 35: Lead-based paint poisoning prevention in certain residential structures (eCFR)
Homes built before 1980 in places near Mendham Township
| Place | Distance | Homes built before 1980 | Compared with this place |
|---|---|---|---|
| Mendham Township | — | 56.0% (±11.5 points) | — |
| Mendham Borough | 2.8 mi | 73.0% (±10.5 points) | Higher |
| Randolph Township | 2.8 mi | 55.6% (±5.8 points) | Not measurably different |
| Morris Township | 4.0 mi | 64.8% (±6.1 points) | Not measurably different |
| Morristown Town | 4.9 mi | 59.3% (±5.7 points) | Not measurably different |
| Bernardsville Borough | 5.0 mi | 70.8% (±10.7 points) | Not measurably different |
| Victory Gardens Borough | 5.4 mi | 64.6% (±17.1 points) | Not measurably different |
| Mine Hill Township | 5.6 mi | 71.1% (±13.5 points) | Not measurably different |
| Morris Plains Borough | 5.6 mi | 64.8% (±9.2 points) | Not measurably different |
Nearby places with a measurably higher figure: Mendham Borough, NJ (73.0%).
Distance is measured in a straight line between the Census Bureau’s internal points for each place.
Homes built before 1980 across Morris County, place by place
| Rank | Place | Homes built before 1980 |
|---|---|---|
| 25 | Morristown Town | 59.3% (±5.7 points) |
| 26 | Chatham Township | 58.8% (±8.6 points) |
| 27 | Lincoln Park Borough | 56.7% (±8.2 points) |
| 28 | East Hanover Township | 56.5% (±8.9 points) |
| 29 | Kinnelon Borough | 56.2% (±7.7 points) |
| 30 | Hanover Township | 56.1% (±7.7 points) |
| 31 | Mendham Township | 56.0% (±11.5 points) |
| 32 | Randolph Township | 55.6% (±5.8 points) |
| 33 | Mount Olive Township | 54.0% (±5.1 points) |
| 34 | Washington Township (Morris County) | 51.7% (±6.5 points) |
| 35 | Montville Township | 50.9% (±6.8 points) |
| 36 | Chester Township | 47.4% (±8.5 points) |
| 37 | Mount Arlington Borough | 44.4% (±8.6 points) |
Showing 13 of 39 places in Morris County, ranked from highest to lowest.
The figures for Mendham Township include the places inside it that have pages of their own: Brookside.
Survey years: 2020–2024 (American Community Survey 5-year estimates).
Margins of error are at the 90% confidence level.
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Questions about Mendham Township
How old are most homes in Mendham Township?
56.0% of homes in Mendham Township, NJ were built before 1980 (2020–2024 American Community Survey).
Do homes in Mendham Township need a lead paint disclosure?
A home built before 1978 does, before it is rented or sold, unless an exemption applies (42 U.S.C. § 4852d); between 39.6% and 56.0% of homes in Mendham Township were built before then.
Does a contractor need lead certification to work on older homes in Mendham Township?
Yes, when the job disturbs more than 6 square feet of paint in a room or 20 square feet outside, or replaces a window: the firm must be certified and a certified renovator must direct the work under the Renovation, Repair and Painting Rule (40 CFR part 745, subpart E).
Sources
To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for Mendham township, Morris County, New Jersey (county subdivision:45360, in state:34 county:027).
Each estimate (E or PE) has a margin of error beside it (M or PM).
The API needs a free key.
DP04_0017PE, DP04_0017PM, DP04_0018PE, DP04_0018PM, DP04_0019PE, DP04_0019PM, DP04_0020PE, DP04_0020PM, DP04_0021PE, DP04_0021PM, DP04_0022PE, DP04_0022PM, DP04_0023PE, DP04_0023PM, DP04_0024PE, DP04_0024PM, DP04_0025PE, DP04_0025PM, DP04_0026PE, DP04_0026PM
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.
Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.
Figures last updated on .
Related
- Housing in Mendham Township at a glance
- Income and affordability in Mendham Township
- Home values in Mendham Township
- Homeowner costs in Mendham Township
- Property taxes in Mendham Township
- Types of homes in Mendham Township
- Heating fuel in Mendham Township
- Commute and cars in Mendham Township
- Crime reported to police in Mendham Township
- Population growth in Mendham Township
- How long people stay in Mendham Township
- New Jersey landlord and tenant rules
- Housing across Morris County
- New Jersey places ranked by age of homes
- Housing data for every place in New Jersey