Putnam County has six towns and three villages, and much of its land drains to New York City reservoirs — so a permit here often depends on septic, well, and watershed approvals as much as on the building department. N3 is a permit expediter Putnam County NY owners, builders, and investors use to put those approvals in the right order and carry the permit through to the certificate of occupancy.

For new homes and many expansions, the Putnam County Department of Health reviews the septic and well design, and the building department generally will not issue the permit until that approval is in hand.
Much of Putnam lies in the watershed that feeds New York City’s Croton reservoirs, where NYC Department of Environmental Protection rules can add septic, stormwater, and setback review.
Brewster, Cold Spring, and Nelsonville are incorporated villages; a property inside one is permitted by the village, not the surrounding town.
Several Putnam towns regulate wetlands, watercourses, and steep slopes locally, often through the planning board or a separate permit.
Most Putnam delays come from filing too early — before the health department has approved the septic and well design, or before a wetland or steep-slope question is answered. We map every approval the permit depends on, file each in the right order, and then carry the building permit through plan review and inspections. See the full process on our building permit expediting page.
A missing certificate of occupancy is a common reason Putnam closings stall — especially on older homes where a previous owner left permits open. We request the town or village file, list every open item, coordinate the final inspections and any health department sign-off, and follow up until the certificate is issued. Details are on our certificate of occupancy help page.
Irregular lots, lakefront parcels, and older homes close to the road often need relief from setback or lot-coverage rules. Our ZBA variance application help covers the case assessment, the application and written narrative, notice requirements, and representation at the hearing. See how our zoning variance consulting works.
Putnam planning boards review site plans, special permits, subdivisions, and — in several towns — wetland and steep-slope permits. As a site plan approval consultant in Putnam County, we prepare the application, coordinate the engineering and environmental forms, respond to the board’s consultants, and attend each meeting. More on our planning board and site plan approvals service.
In Putnam, soils and the health department often decide whether a lot is buildable at all. Our vacant land purchase evaluation checks zoning, perc and septic feasibility, wells, wetlands, watershed setbacks, access, and site-work cost before you commit. See our pre-purchase land evaluation service.
Building a new home in Putnam means coordinating the health department, the building department, a lender, and your trades — often on a sloped or rocky lot. We act as the owner’s construction consultant: contractor selection, loan paperwork, scheduling, and inspections. Read about our new home construction project management.
Custom modular homes can suit Putnam lots with good access, but narrow roads, trees, and slopes can make crane delivery difficult. Compare our custom modular home plans, then have us check lot fit, septic sizing for the bedroom count, and the approval path.
Finished basements, decks, and enclosed porches added without permits are a frequent discovery in Putnam home sales. We coordinate as-built drawings, the retroactive permit, and inspections so the property record matches the house. See our approach to legalizing unpermitted work.
Hamlets such as Mahopac (Carmel), Garrison (Philipstown), and Putnam Lake (Patterson) are part of their towns, so the town building department handles approvals there.
In Putnam the order of approvals matters as much as the approvals themselves. We map it before anything is filed.
Our evaluation work starts with the question many Putnam buyers ask too late: can this lot support a septic system?
It depends on the town, the scope, and whether health department, wetland, or board approvals come first. A complete, correctly sequenced package clears far faster; we give you a written estimate after reviewing the property.
Much of Putnam is. Watershed status can add septic, stormwater, and setback review, so we check it at the start of every project.
Mahopac is part of the Town of Carmel and Garrison is part of the Town of Philipstown, so the town building department handles it. Brewster, Cold Spring, and Nelsonville have their own village departments.
Yes. We review zoning, septic and well feasibility, wetlands, watershed setbacks, access, and site-work cost before you commit.
Yes. We search the file, list the open items, and coordinate inspections until the certificate of occupancy is issued.
Permits, ZBA, ARB, accessory apartments, and legalizations across Westchester’s cities, towns, and villages.
Zoning variances, new-home permits, driveways, and subdivisions from Beacon to the Connecticut line.
Permit expediting, certificates of occupancy, and zoning approvals across Orange County.
Not sure which county page fits your project? Start with all Hudson Valley service areas.
Send us the address and a short description. We will confirm which municipality has jurisdiction, which approvals apply, and the first step.