Columbia addresses cover much of northern and central Knowlton, including Route 94, Mount Pleasant, rural residential roads and the I-80 corridor. Properties range from country homes and farms to highway-oriented commercial sites.
Knowlton Property Guide
Real Estate
Columbia · Delaware · Hainesburg
Explore rural homes, Delaware River property, farms, wooded acreage and country-road living throughout Knowlton Township — with the zoning, floodplain, well, septic, preservation, tax and land-use information that matters before buying, selling or improving property.
River & Country Property
Rural homes
Farms & acreage
Delaware River property
Zoning, flood & site review
Farms & acreage
Delaware River property
Zoning, flood & site review
Property guide, not live inventory: NJTGO does not present sample homes as current listings. Asking prices, availability, taxes, assessments, zoning, flood designations, permits and property conditions change continually. Verify every parcel-specific fact through current public records and qualified professionals.
Verify the actual parcel, not just the mailing address: Columbia and Delaware are postal/community names used throughout Knowlton, and a postal address alone should never be used to determine zoning, flood status, school jurisdiction, taxes or development rights. Confirm the municipality, block and lot for every property.
Knowlton Property Profile
Knowlton's real-estate character is shaped by preserved farmland, open space, wooded hills, the Delaware River, small historic communities and relatively low-density development.
2,472 AcresApprox. preserved farmland reported by the township
3,575 AcresApprox. preserved public open space reported by the township
1997Local open-space tax approved by voters
K–6Knowlton Township Elementary
7–12North Warren Regional
Preservation is part of the market: Knowlton has one of Warren County's stronger land-preservation traditions. That helps protect rural character, but it also means buyers of farms and large tracts should verify whether a parcel is preserved, subject to an agricultural easement, restricted by deed, or affected by open-space ownership before assuming future development rights.
Homes & Property Types
Rural Single-Family Homes
Detached homes on winding township and county roads make up much of the local housing stock, ranging from older farmhouses and historic homes to newer custom residences.
Delaware River Property
River-adjacent homes and land can offer exceptional scenery and recreation access, but flood mapping, elevation, insurance, access and environmental regulation deserve close review.
Farms & Farmhouses
Agricultural properties remain a defining part of Knowlton. Buyers should understand farmland assessment, preservation easements, farm structures, soils, access and permitted agricultural uses.
Wooded Acreage
Large wooded parcels can offer privacy and recreation, but parcel size alone does not establish development, subdivision or septic potential.
Historic & Older Homes
Columbia, Delaware, Hainesburg and surrounding hamlets include older housing and historic properties. Age can add character while increasing the importance of structural, electrical, plumbing, septic and environmental review.
Route 46 & Route 94 Property
Properties along Knowlton's major road corridors may have different access, traffic, zoning and commercial-use considerations from homes on interior rural roads.
Property Character by Community
The Delaware community follows Route 46 and the river corridor, with older homes, farm-market property, river-related land and historic settlement patterns. Flood review is particularly important for low-lying river-area parcels.
Hainesburg and Hainesburg River Road reflect Knowlton's rural, historic and agricultural character, with older homes, larger lots, farms and wooded properties.
Buying Near the Delaware River
The Delaware River is one of Knowlton's greatest amenities and one of its most important real-estate due-diligence factors.
Flood Maps
Knowlton provides a direct FEMA flood-map resource and a municipal floodplain permit application. Never rely on a seller's statement alone to determine whether a structure or building area lies in a regulated flood zone.
Flood Insurance
Mortgage lenders may require flood insurance for certain mapped areas. Even when it is not lender-required, buyers should investigate historical flooding, elevation and insurance availability before closing.
Streams & Watercourses
Knowlton's development-review materials require attention to floodplain, floodway, watercourses and nearby site features. River and stream buffers can affect building placement and site improvements.
Access After Severe Weather
Review driveway, road and bridge access as part of the property inspection. A house that remains dry can still experience access limitations during significant river or stream flooding.
Farms, Farmland Assessment & Preserved Land
Agriculture is not merely scenic background in Knowlton — it is a major land use with tax, deed and development implications.
Preserved Farmland
Knowlton reports approximately 2,472 acres of preserved farmland. Preserved farms can be subject to permanent agricultural deed restrictions that materially limit nonagricultural development.
Farmland Assessment
New Jersey farmland assessment can lower the taxable assessment of qualifying agricultural land, but eligibility is based on continued agricultural/horticultural use and annual qualification requirements.
Rollback Taxes
If qualifying farmland changes to a nonagricultural use, rollback taxes may apply. Buyers should understand existing assessment status before planning a use change.
Farm Structures & Operations
Barns, greenhouses, fencing, farm lanes, drainage, wells and agricultural buildings should be inspected and their permitted status understood like any other major property improvement.
Do not confuse farmland assessment with preserved farmland: a parcel receiving farmland tax assessment is not automatically preserved, and a preserved farm may carry permanent deed restrictions beyond ordinary zoning. Confirm both statuses separately.
Zoning, Land Use & Development
Knowlton publishes a current zoning map, tax maps, zoning application, land-development application, driveway application, floodplain permit and other property forms through the township website.
Zoning Permit Review
The township zoning application requires the block, lot, lot size, zoning district, proposed use or structure, setbacks and a site plan or property survey showing existing and proposed structures, septic and well locations.
Land Use Board
Knowlton's combined Land Use Board reviews subdivisions, larger site-plan proposals, variances and other applications involving municipal land-development regulations.
Other Approvals
The township zoning packet specifically notes that projects may also require driveway, well, septic, soil-disturbance, stream/wetland or other local, county and state approvals.
Subdivision Assumptions
Never value excess acreage based on a presumed number of building lots without engineering, zoning, septic, access, environmental and preservation review.
Private Wells & Septic Systems
Private water and onsite wastewater systems are common in rural Knowlton. Warren County Health Department maintains permitting, inspection and searchable record resources for septic systems and private wells.
Septic System
Review the system type, age, pumping history, disposal-field location, repair history, permits, inspection condition and any available reserve area.
Private Well
Review well depth, yield, equipment, water-treatment systems and current water-quality testing. New Jersey's Private Well Testing Act can apply to property transfers.
Searchable County Records
Warren County makes septic and private-well records searchable by municipality, address or block and lot, without requiring a general OPRA request.
Future Additions
A proposed pool, barn, garage or house addition can conflict with the existing septic field, replacement area, private well or required setbacks.
Land, Wetlands, Slopes & Site Review
Knowlton acreage can be beautiful and still contain major physical or regulatory constraints. Parcel-specific review matters before assigning development value.
- Confirm zoning district and permitted uses.
- Check preserved-farmland or deed-restriction status.
- Review wetlands, streams and floodplain.
- Confirm legal road frontage and driveway access.
- Review soils and septic feasibility.
- Verify utility and private-well conditions.
- Inspect foundation, roof and drainage.
- Review electrical and plumbing systems.
- Investigate well and septic records.
- Inspect barns, garages and retaining walls.
- Review permits for substantial additions.
- Consider specialized environmental testing where appropriate.
- Check current FEMA flood mapping.
- Review floodplain permit requirements.
- Investigate prior flooding and drainage.
- Confirm stream/wetland buffers.
- Review insurance implications.
- Use engineering or environmental professionals when warranted.
Property Taxes, Assessments & Public Records
Knowlton's current tax and assessment contacts are available through the municipal directory, and the township publishes tax maps and a 2026 tax book through its forms page.
Tax Collector
908-496-4816 ext. 4
Use the township tax office to verify the current tax account, payment status and related municipal tax information for the exact block and lot.
Tax Assessor
908-496-4816 ext. 5
Assessment records, farmland-assessment questions and property-assessment matters should be verified directly with the current assessor.
Tax Maps & 2026 Tax Book
Knowlton provides current tax-map and tax-book resources online, useful for confirming block/lot identification before deeper property research.
Deeds & Filed Maps
Public land records such as deeds, liens and filed maps are handled through the Warren County Clerk rather than the municipal construction office.
Schools & Property Search
Knowlton Township Elementary School
Kindergarten–Grade 6
80 Route 46, Delaware, NJ 07833
908-475-5118
80 Route 46, Delaware, NJ 07833
908-475-5118
Knowlton maintains its own elementary district for local students.
North Warren Regional
Grades 7–12
10 Noe Road, Blairstown, NJ 07825
908-362-8211
10 Noe Road, Blairstown, NJ 07825
908-362-8211
Knowlton students continue to North Warren Regional for middle and high school grades.
Verify school enrollment directly: real-estate listings may use mailing addresses or school labels inconsistently. Confirm enrollment eligibility with the school district before relying on a property advertisement.
Buyer Checklist
- Verify Knowlton Township jurisdiction.
- Confirm block, lot and current tax record.
- Review deed, survey, easements and rights-of-way.
- Check farmland-preservation and deed-restriction status.
- Check zoning and permitted use.
- Review FEMA flood mapping and drainage.
- Investigate wetlands and watercourses.
- Confirm driveway and road access.
- Search septic and well records.
- Inspect septic condition and capacity.
- Complete appropriate well-water testing.
- Inspect outbuildings and major improvements.
- Do not assume acreage is subdividable.
- Verify additions, barns, pools and garages before relying on them.
- Confirm home-business rules if relevant.
- Check preserved-farm restrictions before changing agricultural use.
Seller Checklist
- Gather surveys and deeds.
- Collect well and septic records.
- Locate permits for significant improvements.
- Have current tax and assessment information available.
- Do not advertise unverified subdivision potential.
- Disclose known preservation restrictions.
- Describe river access and frontage accurately.
- Avoid unsupported claims about zoning or buildable acreage.
- Expect well and septic inspection questions.
- Expect buyers to review flood and wetland conditions.
- Be ready for survey and easement questions.
- Document maintenance of barns and other outbuildings.
Finding the Right Real-Estate Professional
For Knowlton, local knowledge should go beyond knowing sale prices. Rural, farm and river property can require specialized transaction experience.
Rural Property Experience
Look for familiarity with private wells, septic systems, surveys, easements, larger lots and rural inspections.
Farm & Acreage Experience
Ask about farmland assessment, preserved-farm easements, rollback taxes, soils and subdivision due diligence.
River Property Experience
For Delaware River or stream properties, ask about flood maps, insurance, elevation, drainage and environmental review.
NJTGO commercial-link policy: Standard real-estate professional listings do not include external commercial website links. Enhanced paid listings and real-estate advertising can include promotional details, photos and direct website or property-listing links.
Official Property & Planning Resources
Use current government sources for parcel-specific due diligence rather than relying solely on a real-estate portal.
Knowlton Township
Knowlton Property, Zoning & Tax Forms
Knowlton Land Use Board
Knowlton Municipal Directory
Open Space & Farmland Preservation
Warren County Septic & Wells
FEMA Flood Maps
NJDEP Watershed & Land Management
NJ Farmland Assessment
Professional guidance matters: NJTGO is not an MLS, brokerage, lender, appraisal company, attorney, surveyor, engineer, environmental consultant or inspection service. Rural and river transactions can involve legal, financial, environmental and technical issues requiring appropriately licensed professionals.
More Knowlton Guides
Main Community Guide
Government, schools, Lakota Wolf Preserve, Ramsaysburg, recreation, history and community resources.
Business & ShoppingAutomotive, home trades, pet care, nurseries, specialty services and local shopping.
Food & DrinkRoadside dining, taverns, farm-market food, winery experiences, coffee and treats.
Visiting & LodgingWildlife attractions, Ramsaysburg, river recreation, camping, inns and trip planning.
ClassifiedsLocal items, notices, farm-related goods, pets, sales and announcements.
JobsLocal employers, school opportunities, municipal work, tourism, trades and county employment.
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