| NAA |
National Apartment Association |
| NAAQS |
National Ambient Air Quality Standards |
| NACo |
National Association of Counties |
| NACORE |
National Association of Corporate Real Estate |
| NACS |
National Association of County Surveyors |
| NADO |
National Association of Development Organizations |
| NAFSMA |
National Association of Flood and Stormwater Management Agencies |
| NAHB |
National Association of Home Builders |
| NAHSC |
National Automated Highway System Consortium |
| NAIFA |
National Association of Independant Fee Appraisers |
| NALMS |
North American Lake Management Society |
| NALS |
Nevada Association of Land Surveyors |
| NAMA |
National Association of Master Appraisers |
| NAMB |
National Association of Mortgage Brokers |
| NAPL |
National Air Photo Library (Canada) |
| NAPP |
National Aerial Photography Program |
| NAR |
National Association of Realtors |
| NARA |
National Archives and Records Administration |
| NARAMU |
National Association of Review Appraisers and Mortgage Underwriters |
| NARC |
National Association of Regional Councils |
| NAREB |
National Association of Real Estate Brokers |
| NAREIM |
National Association of Real Estate Investment Managers |
| NAREIT |
National Association of Real Estate Investment Trust |
| NARELLO |
National Association of Real Estate Licensing Law Officials |
| NARS |
National Archives and Records Service |
| NARUC |
National Association of Regulatory Utility Commissioners |
| NASF |
Net Assignable Square Footage |
| NASS |
National Agricultural Statistics Service |
| NASTO |
Northeastern Association of State Transportation Officials |
| NATM |
New Austrian Tunnelling Method |
| NAV |
net asset value |
| NC |
Neighborhood Commercial (Bedford County Zoning District) |
| NCA |
National Cemetery Administration |
| NCC |
Nature Conservancy Council (UK) |
| NCREIF |
National Council of Real Estate Investment Fiduciaries |
| NARPM |
National Association of Residential Property Managers |
| NAWQUA |
National Water Quality Assessment |
| NBFU |
National Board of Fire Underwriters |
| NBI |
National Bridge Inventory |
| NBIS |
National Bridge Inspection Standards |
| NCARB |
National Council of Architectural Registration Boards |
| NCEE |
National Council of Engineering Examiners |
| NCEES |
National Council of Examiners for Engineering and Surveying |
| NCEP |
National Centers for Environmental Prediction |
| NCGIA |
National Center for Geographic Information and Analysis |
| NCHRP |
National Cooperative Highway Research Program |
| NCIDQ |
National Council for Interior Design Qualification |
| NCR |
national capital region |
| NCRDS |
National Coal Resources Data System |
| NCRR |
National Center for Research Resources |
| NCSA |
National Crushed Stone Association |
| NCSD |
Nebraska Conservation and Survey Division |
| NCSHA |
National Council of State Housing Agencies |
| NCSS |
North Carolina Society of Surveyors |
| NCUA |
National Credit Union Administration |
| NDEP |
Nevada Division of Environmental Protection |
| NDF |
Nevada Division of Forestry |
| NDNRC |
Nevada Department of Natural Resources and Conservation |
| NDOT |
Nevada Department of Transportation |
| NDSL |
Nevada Division of State Lands |
| NDSPLS |
North Dakota Society of Professional Land Surveyors |
| NDT |
non-destructive testing |
| NEC |
National Electrical Code |
| NECEPT |
Northeast Center of Excellence for Pavement Technology |
| NEHRP |
National Earthquake Hazards Reduction Program |
| NEIS |
National Earthquake Information Service |
| NEL |
National Exploitation Laboratory |
| NELA |
National Electrical Light Association |
| NEMA |
National Electrical Manufacturing Association |
| NEMO |
North East Map Organization |
| NEPA |
National Environmental Policy Act |
| NESA |
National Electrical Safety Code |
| NESHAPs |
National Emission Standards for Hazardous Air Pollutants |
| NFDRS |
National Fire Danger Rating System |
| NFIP |
National Flood Insurance Program |
| NFIRA |
National Flood Insurance Reform Act |
| NFIS |
National Forest Information System |
| NFPA |
National Fire Prevention Assosication; National Fire Protection Association |
| NGDA |
National Geospatial Digital Archive |
| NGDF |
National Geospatial Data Framework (UK) |
| NGIC |
National Geodetic Information Center |
| NGPRP |
Northern Great Plains Resource Program |
| NGWIC |
National Ground Water Information Center |
| NPL |
non-performing loan |