Building a home on Lake Lanier
On Lake Lanier you don't own the shoreline. The U.S. Army Corps of Engineers does, and its rules decide where your house, septic system and dock can go. Here is what to check before you buy a lake lot.
The lake in numbers
Lake Sidney Lanier covers about 39,038 surface acres at its full pool elevation of 1071 feet above mean sea level. The Corps' Shoreline Management Plan lists 1085 feet as the lake's maximum flood elevation. Those two numbers come up in almost every lake-lot decision.
1. Find the government property line
The line between your lot and Corps land is not a contour line at a set elevation. It runs mostly in straight lines between survey monuments. Trees painted along it are witness trees and do not mark the exact boundary.
The Corps notes that houses, decks and pools sometimes end up partly on public land. It recommends keeping structures at least 10 feet back from the line. Get a current survey that locates the monuments before you design anything.
2. Check for a flowage easement
Many lake lots carry a flowage easement that lets the Corps flood private land up to the 1085 elevation, occasionally or permanently. Inside the easement:
- You cannot build a habitable structure.
- You cannot change the ground's contour.
- Some non-habitable structures may be allowed with a Corps Consent to Easement.
3. Plan septic above 1085
The Corps does not allow new septic systems below the 1085 elevation, no matter who owns the land. If the lot has no sewer, the house and drain field both have to fit above that line, along with the county's own soil and setback rules.
4. Don't assume you can get a dock
Private docks sit on public shoreline under a Shoreline Use Permit. Under the 2004 Shoreline Management Plan:
- Docks are allowed only where the shoreline is designated Limited Development.
- A lot needs at least 82 feet of private land adjoining public property.
- The limit is one dock per household, and community docks are preferred.
- The plan caps the total number of private docks. Once the cap is reached, the Corps stops accepting new requests.
- Permits are temporary and non-transferable. They become void when the property is sold, and the new owner must apply.
Before you make an offer: ask whether the lot has a current dock permit, and call the Corps' Lanier Project Management Office about the shoreline designation and whether a permit can be issued to you as a new owner.
5. Know the limits on clearing
Only minor vegetation work is allowed on Corps land, and only with a permit. That means understory growth and pruning along a narrow corridor to the water. Clearing for a view or a lawn is not permitted.
6. Then the county rules apply too
Lake Lanier touches several counties, including Hall, Forsyth and Dawson. The county or city still issues your building permit and septic permit, with its own buffers and fees. See our pages for Gainesville & Hall County, Cumming & Forsyth County and Dawsonville & Dawson County.
The Corps has discussed updating the 2004 plan. Confirm current rules with the Lanier Project Management Office before you commit.
Sources
Rules and fees change. Confirm with the office before you rely on them. Last checked October 2026.
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