01Land and lots in Warren County, NJ
Warren County land and lots for sale.
Browse land for sale in Warren County, New Jersey. Land is a real market here, a defining feature of a rural Skylands county: farmland and rolling fields in Harmony, Franklin, and Greenwich, mountain and forest lots in Blairstown, Hope, Frelinghuysen, and Knowlton near Jenny Jump State Forest and the Delaware Water Gap, and estate acreage across the countryside. For buyers who want to build a custom home, start or expand a farm, or hold land in one of northern New Jersey's most rural counties, Warren County offers acreage at prices well below the eastern suburbs, though every parcel demands careful due diligence on farmland assessment, the NJ Highlands Act, wetlands, steep slope, and well, septic, and perc feasibility.
Land in Warren County spans small residential lots, farmland, mountain and forest parcels, and larger estate acreage, priced by size, location, farmland assessment, buildability, and constraints such as the NJ Highlands Act in the east, wetlands, steep slope, and well and septic feasibility.
Updated Spring 2026
Search Warren County land and lots, updated in real time.
Explore the latest homes for sale in Warren County, NJ, updated in real time so you see accurate availability and pricing across the Delaware River towns, the Hackettstown and Washington suburbs, and the rural mountain and farm country.
Warren County is served by districts including Hackettstown, Phillipsburg, and Warren Hills Regional and by Warren County Community College and Centenary University, with Atlantic Health Hackettstown Medical Center and St. Luke's Warren Campus nearby and Interstates 78 and 80 for regional access. Use the price-range pages below to narrow your search, or call 888-327-6555 for a town-by-town update.
When comparing land in Warren County, treat due diligence as the purchase: confirm zoning and permitted uses, farmland assessment and preservation status, NJ Highlands Act applicability in the east, wetlands, floodplain, and steep slope, and, for a homesite, well and septic feasibility through perc testing, since a Harmony farm parcel, a Blairstown mountain lot, and a Delaware River parcel carry very different constraints and buildability.
70 Properties Available In Warren
6.54 Acres$179,000New- 1/2 2
1.87 Acres$150,000Active52 Little Philadelphia Rd, Washington Twp., NJ 07882
Listed by REALTY ONE GROUP NEXT DOOR
Vacant Land
26 Acres$399,000Under Contract- 1/2 2
3.77 Acres$80,000Under Contract - 1/3 3
0.28 Acres$75,000Under Contract - 1/10 10
20.38 Acres$350,000Active - 1/2 2
4.06 Acres$114,999Price Dropped by $9K - 1/8 8
9.01 Acres$400,000Active - 1/43 43
170 Acres$4,000,000Active - 1/20 20
7.71 Acres$186,000Active - 1/3 3
0.48 Acres$79,000Active - 1/9 9
10.04 Acres$150,000Active - 1/6 6
0.57 Acres$59,000Price Dropped by $20K - 1/15 15
6.1 Acres$179,000Active - 1/2 2
1.39 Acres$95,000Active - 1/2 2
2.98 Acres$74,900Active - 1/16 16
3.02 Acres$74,000Active 
3.67 Acres$99,000Active- 1/14 14
1.04 Acres$70,000Active - 1/6 6
3.1 Acres$74,000Under Contract - 1/2 2
5.9 Acres$39,999Active - 1/11 11
1.13 Acres$52,000Active - 1/6 6
2.73 Acres$39,900Active - 1/4 4
1.3 Acres$535,000Active
explore listings in Warren
02Explore Communities & Market
Where to buy land in Warren County.
Land in Warren County ranges from small residential lots to farmland and large mountain and forest parcels, and where you look and what you can do with it depend on location, zoning, and a stack of due-diligence issues. Value-minded buyers who want farmland gravitate to Harmony, Franklin, Greenwich, and the rolling agricultural townships, often under farmland assessment; buyers who want mountain and forest acreage look to Blairstown, Hope, Frelinghuysen, and Knowlton near Jenny Jump State Forest and the Delaware Water Gap; and buyers who want a buildable homesite look across the rural townships, subject to wells, septic, perc testing, and, in the eastern part of the county, the NJ Highlands Act. Because a Warren County parcel's value turns on what can legally and physically be built on it, due diligence is everything. Compare the areas below before you choose.
Land character varies sharply across the county. Harmony, Franklin, and Greenwich offer rolling farmland and agricultural parcels, many under farmland assessment and some preserved; Blairstown, Hope, Frelinghuysen, and Knowlton offer mountain and forest lots with slope, trees, and views near the Appalachian Trail and the Delaware Water Gap; the Delaware River corridor offers riverfront and river-view parcels; and the eastern townships fall partly under the NJ Highlands Act, which constrains development. That range lets land buyers pursue a farm, a mountain homesite, a river parcel, or estate acreage, but each carries its own mix of farmland assessment, wetlands, steep-slope, well, septic, and perc, and Highlands considerations that shape price and buildability.
Land buyers should also weigh how sharply Warren County parcels differ: rolling farmland in Harmony, Franklin, or Greenwich, often under farmland assessment and sometimes preserved, a wooded mountain lot in Blairstown, Hope, or Frelinghuysen with slope and access challenges near Jenny Jump State Forest and the Delaware Water Gap, and a Delaware River parcel with frontage or views each carry a distinct mix of zoning, farmland assessment, wetlands, steep slope, well, septic, and, in the east, NJ Highlands Act constraints, so confirming those on the specific parcel is what turns raw acreage into a clear picture of the farm, home, or estate it can become.
Zoning, due diligence, and buildability for land buyers in Warren County.
Buying land in Warren County is a due-diligence exercise as much as a purchase. Before committing, a buyer should confirm the zoning and permitted uses; determine whether the parcel is under farmland assessment or preserved; check for wetlands, floodplain, and steep slope; establish whether the eastern-county NJ Highlands Act applies; and, for a homesite, confirm well and septic feasibility through perc and soil testing, since much of the county has no public water or sewer. A parcel that looks buildable can be constrained by any of these, so the work done before closing determines whether the land can become the farm, home, or estate the buyer envisions.
For land buyers, the county's appeal is space, agriculture, and value, tempered by real constraints. Farmland in Harmony, Franklin, and Greenwich can support farming and may carry farmland assessment for reduced taxes, though preservation and deed restrictions can limit development; mountain and forest lots in Blairstown, Hope, and Frelinghuysen offer privacy and views but bring slope and access challenges; and the NJ Highlands Act limits development across much of eastern Warren County. Buyers who understand these issues, and who confirm well, septic, and perc feasibility on any homesite, can find genuine value in Warren County land at prices well below the eastern suburbs.
Day to day, land ownership in Warren County connects buyers to the county's rural, agricultural character. A farm parcel in Harmony or Franklin ties the owner to the county's farmland-assessment and preservation programs and its working-agriculture heritage near Merrill Creek Reservoir; a mountain or forest lot in Blairstown or Frelinghuysen offers privacy and outdoor access near Jenny Jump State Forest, the Pequest Trout Hatchery, and the Delaware Water Gap; and a river parcel offers Delaware frontage or views. For each, the path from raw land to farm, home, or estate runs through the county's zoning, the NJ Highlands Act in the east, and well, septic, and perc due diligence, so patient, informed buyers are best positioned to succeed.
The value of Warren County land rests entirely on what can legally and physically be done with it, so the smartest buyers make due diligence the purchase: confirming zoning, farmland assessment and preservation status, NJ Highlands Act applicability in the east, wetlands, floodplain, and steep slope, and, for a homesite, well and septic feasibility through perc testing turns a farm parcel in Harmony, a mountain lot in Blairstown, or a Delaware River parcel from raw acreage into a clear picture of what it can become, at prices well below the eastern suburbs in one of northern New Jersey's most rural counties.
Search Warren County homes by price.
Jump to a price range or property type that fits your search, browse the Warren County area guide, or check current open houses. Every link below is a live page.
Browse Warren County towns & neighborhoods.
Explore our town-by-town guides near Warren County and across Warren County. Each guide covers local neighborhoods, schools, commute options, and current listings.
Warren County open houses.
Browse upcoming open houses in Warren County, or register for weekly alerts. Call 888-327-6555 to schedule a private showing any day of the week.
Homes for sale by property type.
Explore every type of home in and around Warren County through our Warren County property pages: single-family homes, river-town, mountain, and farm-country homes, townhomes and condos, new construction, 55+ active-adult communities, and multi-family investment properties.
The Warren County land market, by the numbers.
The median list price in Warren County, NJ is currently $432K, about $230 per square foot. Homes here average 45 days on market with roughly 500 active listings. Updated Spring 2026.
Warren County's land market spans the farmland and agricultural parcels of Harmony, Franklin, and Greenwich, the mountain and forest lots of Blairstown, Hope, and Frelinghuysen, the riverfront parcels of the Delaware corridor, and estate acreage across the countryside, all priced by size, buildability, farmland assessment, and constraints such as the NJ Highlands Act, wetlands, steep slope, and well and septic feasibility.
Updated Spring 2026
Within Warren County, larger, more buildable, and better-located parcels, whether preserved-adjacent farmland in Harmony or estate acreage with road frontage in Blairstown, command the higher land prices, while constrained, remote, or steep parcels and those limited by the NJ Highlands Act or wetlands sell for less. Because a Warren County parcel's value turns on what can legally and physically be built or farmed on it, land buyers benefit from confirming zoning, farmland assessment, NJ Highlands Act status, wetlands, steep slope, and well, septic, and perc feasibility before committing, since those factors shape both price and the land's ultimate use. Call 888-327-6555 for a street-by-street breakdown.
Why buy land in Warren County.
- Farmland & agricultureHarmony, Franklin, and Greenwich offer rolling farmland and agricultural parcels, many under farmland assessment, in the county's working-agriculture heartland.
- Mountain & forest lotsBlairstown, Hope, Frelinghuysen, and Knowlton offer mountain and forest acreage near Jenny Jump State Forest and the Delaware Water Gap.
- Estate & custom homesitesThe rural townships offer buildable acreage for custom homes and estates, subject to wells, septic, perc testing, and the NJ Highlands Act in the east.
- Value below the suburbsWarren County land offers acreage at prices well below the eastern suburbs, a genuine market in one of northern New Jersey's most rural counties.
- Due diligence is essentialEvery parcel demands care on farmland assessment, the NJ Highlands Act, wetlands, steep slope, and well, septic, and perc feasibility.
Amenities & community overview.
A closer look at farmland, forest, and buildability for land buyers in Warren County.
- Browse all homes for sale in Warren County or explore the wider Warren County market.
- Compare Warren County neighborhoods and home styles before choosing, from attainable options to its premier properties.
- Weigh your commute: Interstate 78, Interstate 80, Route 22, Route 31, Route 46, and Route 57, plus warren County has no commuter rail of its own, so Interstate 78 carries western residents to the Lehigh Valley in Pennsylvania and Interstate 80 carries eastern residents toward Morris County and New York, with NJ Transit buses and the Morristown and Raritan Valley rail lines reachable to the east.
- Explore the Delaware River town of Phillipsburg across from Easton, Centenary University in Hackettstown, the Victorian county seat of Belvidere, Jenny Jump State Forest, and the Delaware Water Gap, with parks, dining, and rail access nearby.
- Call 888-327-6555 for a live, neighborhood-by-neighborhood market update in Warren County.
Land ownership in Warren County connects buyers to the county's rural, agricultural character, but its value always turns on due diligence. A farm parcel in Harmony, Franklin, or Greenwich ties the owner to the county's farmland-assessment and preservation programs and its working-agriculture heritage near Merrill Creek Reservoir; a mountain or forest lot in Blairstown, Hope, or Frelinghuysen offers privacy and views near Jenny Jump State Forest, the Pequest Trout Hatchery, and the Delaware Water Gap, but brings slope and access challenges; a Delaware River parcel offers frontage or views; and the eastern townships fall partly under the NJ Highlands Act, which constrains development. Because a parcel's ultimate use depends on zoning, farmland assessment, Highlands status, wetlands, steep slope, and well, septic, and perc feasibility, land buyers who do the work before closing find genuine value at prices well below the eastern suburbs, while those who skip it risk buying land that cannot become the farm, home, or estate they envisioned.
Resources for buyers & sellers.
Local and county government, schools, healthcare, transportation, parks, and financial assistance relevant to Warren County, NJ buyers and sellers, every link verified and described below.
First-time home buyer programs in Warren County.
First-time buyer in Warren County or Warren County, NJ? The New Jersey Dream Homeownership Program from NJHMFA helps eligible buyers with affordable financing, down payment and closing-cost assistance, and homebuyer education. Special options are available for military members, public safety professionals, educators, and healthcare workers.
03Connect for Answers
Frequently asked questions.
Is there really a land market in Warren County, NJ?
Yes. Land is a genuine, defining market in this rural Skylands county, spanning farmland in Harmony and Franklin, mountain and forest lots in Blairstown and Frelinghuysen, riverfront parcels on the Delaware, and estate acreage across the countryside. Call 888-327-6555 to discuss available parcels.
What should I check before buying land in Warren County?
Confirm the zoning and permitted uses, farmland assessment and preservation status, NJ Highlands Act applicability in the east, wetlands, floodplain, and steep slope, and, for a homesite, well and septic feasibility through perc and soil testing, since much of the county has no public water or sewer. We can help you assemble the due diligence.
How does the NJ Highlands Act affect land in Warren County?
The NJ Highlands Act constrains development across much of the eastern part of the county, limiting what and how much can be built on affected parcels. It is one of the most important issues for eastern-county land buyers, so confirm a parcel's Highlands status early. We can help.
What is farmland assessment in Warren County?
Farmland assessment is a New Jersey program that can reduce property taxes on qualifying agricultural land. Much of Warren County's farmland in Harmony, Franklin, and Greenwich is assessed as farmland, though some is preserved with deed restrictions that limit development. Confirm the status and any restrictions before buying.
Do I need a perc test to build on Warren County land?
Usually, yes, where there is no public sewer. A percolation (perc) test determines whether the soil can support a septic system, which is essential for building on most rural Warren County parcels. Confirm well feasibility as well, since much of the county relies on private wells.
Where is the best farmland in Warren County?
Harmony, Franklin, Greenwich, and the rolling agricultural townships hold much of the county's farmland, near Merrill Creek Reservoir and the Delaware. Many parcels carry farmland assessment, and some are preserved, so confirm the status and permitted uses for any parcel you consider.
Can I build a custom home on land in Warren County?
Yes, subject to zoning, wells, septic, perc testing, and, in the east, the NJ Highlands Act. The rural townships offer buildable acreage for custom homes and estates near Jenny Jump State Forest and the county's farms. See our new construction page and call us to evaluate a parcel.
Are there mountain and forest lots in Warren County?
Yes. Blairstown, Hope, Frelinghuysen, and Knowlton offer mountain and forest acreage near Jenny Jump State Forest, the Appalachian Trail, and the Delaware Water Gap, offering privacy and views but often bringing slope, access, and buildability challenges to weigh.
How is land priced in Warren County?
By size, location, buildability, farmland assessment, road frontage, and constraints such as the NJ Highlands Act, wetlands, and steep slope, so a buildable farm parcel in Harmony, a steep mountain lot in Blairstown, and a river parcel price very differently. We can help you evaluate a specific parcel.
Can Four Point Realty help me buy land in Warren County?
Yes. We help land buyers evaluate farmland, mountain and forest lots, and estate acreage, and navigate zoning, farmland assessment, the NJ Highlands Act, wetlands, steep slope, and well, septic, and perc due diligence across the county. Call 888-327-6555 to start.
Can Four Point Realty help me sell land in Warren County?
Yes. We market land and acreage with pricing built on real comparables, buildability, and use, and help present a parcel's zoning, farmland assessment, and utility feasibility clearly to buyers. Call 888-327-6555 to discuss your property.
What areas near Warren County should land buyers also consider?
Buyers sometimes compare Warren's farmland and acreage against neighboring Hunterdon, Sussex, or Morris County for additional agricultural and mountain land in the Skylands. We can help you weigh the trade-offs.
How do I get alerts for new land listings in Warren County?
Register for a free account and set your acreage, town, and use filters, or call 888-327-6555 and we will set up a curated land search across the county's farmland, mountain, and forest parcels for you.
Why choose Four Point Realty for your search.
Buying or selling a home is one of the biggest financial decisions you will make. Four Point Realty is a trusted NJ real estate resource led by Naveen Sharma, offering current listings, strong local market knowledge, and honest insights from the first showing to the closing table. Call 888-327-6555 today.
Naveen Sharma
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