Buying a lot in Guilford County, NC: septic, sewer, zoning and flood checks

By Nara Bakthisaran. Sources checked Oct 15, 2026. Always confirm with the county before you pay or close.

Septic and soil evaluation process

In NC, the old "perc test" is now a soil and site evaluation by county Environmental Health. If the site qualifies, the county issues an Improvement Permit (IP): where the system can go, what type, and for how many bedrooms. The Construction Authorization (CA/ATC) comes next and is needed before a building permit. An IP for a 3-bedroom house may not cover 4 bedrooms.

The county publishes a Soil New Health Residential (SNHR) Permit Timeframes Dashboard on the On-site Wastewater page, showing apply date to site visit to installation. Check it before setting a due diligence period. The county's planning guide says Improvement Permits are valid for 5 years (https://www.guilfordcountync.gov/media/433/download?attachment=).

Environmental Health contact page: https://www.guilfordcountync.gov/government/departments-and-agencies/health-and-human-services-agency/public-health/environmental-health/site-wastewater

Fees as published

Official fee schedule: https://www.guilfordcountync.gov/government/departments-and-agencies/department-health-and-human-services/public-health/environmental-health/fee-schedule

Sewer and city utilities

Greensboro: call Water Resources at 336-373-2055 to find out whether city water or sewer reaches a lot. A first-time connection can carry a system development fee, and a licensed utility contractor has to install the lateral. Outside the city, an annexation petition may be required (https://www.greensboro-nc.gov/departments/water-resources/developers-and-contractors/new-connections-to-water-or-sewer). High Point: there's a $100 connection application, and service outside city limits generally requires voluntary annexation (https://www.highpointnc.gov/DocumentCenter/View/24678/Water-Sewer-Connection-Request-PDF). If sewer is available, you generally skip septic permitting, but there may be tap or extension costs.

Zoning and setbacks: where to check

Unincorporated areas: Guilford County Planning & Development, which administers the county's Unified Development Ordinance (https://www.guilfordcountync.gov/government/departments-and-agencies/planning-and-development). Greensboro: Planning Department, 336-373-2144 (https://www.greensboro-nc.gov/departments/planning). High Point: Planning & Development, 336-883-3151, permits@highpointnc.gov (listed on the city's connection application above). Guilford GIS also publishes septic and soil-evaluation layers (https://gcgis.guilfordcountync.gov/arcgis/rest/services/GISDV/WaterQuality_WellSeptic/FeatureServer). Ask about the zoning district, minimum lot size, front, side and rear setbacks, road frontage and access, and any HOA or recorded restrictions.

Flood check

• FEMA Flood Map Service Center: https://msc.fema.gov/portal/search. Look up the address and check for zones A or AE.
• First Street (riskfactor.com): free property-level flood risk score that models future risk beyond FEMA zones. It's useful context but not a regulatory determination.

Pre-purchase checklist

• Make the contract contingent on an IP (or a soil scientist's report) for your bedroom count, and give it enough time
• Is a permit already on file? Get a copy and check its date (5-year validity)
• Is sewer available, and what does connection cost?
• Will a well be needed? Ask neighbors about water quantity and quality
• Zoning, setbacks and minimum lot size; deed restrictions and HOA
• Legal road access (not landlocked) and driveway permit (NCDOT if it's a state road)
• FEMA flood zone, wetlands, streams and buffers
• Survey with corners marked (also needed for the soil evaluation visit)
• Title search and easements
• Rough site-work budget: clearing, grading, a longer driveway, an alternative septic system

General guidance: NC State Extension, https://content.ces.ncsu.edu/investigate-before-you-invest · NC Real Estate Commission, https://www.ncrec.gov/Brochures/DueDiligenceBrochure.pdf