Quick answer: The cheapest engineering on a land development project is the engineering you buy before you own the land. Developers who shop for property with their civil and stormwater engineer on retainer screen parcels in days, pay for full feasibility only on finalists, and negotiate contract contingencies around real limits. Developers who order feasibility one parcel at a time pay a fresh fee every time a deal dies. Ten site checks, zoning and conditions, access, sewer or septic, buffers and floodplain, topography, detention footprint, soils, utilities, easements and title, and the permitting calendar, decide yield before the first drawing.
Where the money is actually won
Design fees, permit fees and construction costs get the attention, but the number that decides whether a project works is set the day the purchase contract is signed: how many lots, pads or square feet the site will actually yield, and what it will cost to get there. Every limit that is discovered after closing comes out of margin. Every limit discovered before the contract comes out of the price or ends the deal at no cost. That is the whole argument for bringing land development engineering into the shopping phase.
Two ways to pay for feasibility
| One-off feasibility per parcel | Engineer on retainer during the search | |
|---|---|---|
| How parcels get screened | Full feasibility report ordered after you find a parcel you like | Engineer does a rapid desktop screen on every candidate; full report only on finalists |
| Cost pattern | A complete fee every time, including on parcels that die | A predictable monthly or program fee; screening cost per parcel falls as volume rises |
| Turnaround | Queued behind the engineer’s other work | Priority turnaround; the engineer already knows your product, your counties and your lenders |
| Negotiating position | Limits found after LOI, inside a short due-diligence window | Limits known before the offer; contingencies and price written around them |
| Knowledge carry-over | Restarts with each parcel | Compounds: the same team learns the same submarkets, reviewers and utility providers |
If you look at two or three sites a year, one-off reports are fine. If you are actively hunting, the retainer model pays for itself the first time a quick screen kills a bad parcel before you spend on a survey, a soils crew and a full report. What a full report includes and what it costs is covered in what a feasibility report and concept plan cost and site feasibility report before you buy land; our retainer and per-project options are described under feasibility studies and reports.
The ten checks that decide yield
1. Zoning, conditions and moratoria
The zoning map is the start, not the answer. Pull the zoning resolution for any prior rezoning; recorded conditions on density, buffers, architecture and access can be more restrictive than the district. Then check for moratoria: Forsyth County extended its residential rezoning moratorium in October 2026, with exceptions for certain districts, and has run a separate moratorium on sketch plats and LDPs for older residential zonings. If a rezoning is needed, the exhibit the jurisdiction expects is described in zoning exhibit requirements for rezoning, and the Forsyth specifics are in our Forsyth County LDP post.
2. Access and sight distance
A parcel on a state route needs a GDOT driveway permit, and counties such as Forsyth require GDOT approval of the entrance before the LDP is issued. Sight distance, deceleration lanes, median breaks and the distance to the nearest intersection can turn a corner lot into a single-access site or require off-site road work. Have the engineer check it from the road before you check it on paper.
3. Sewer or septic
Nothing changes lot count faster. Gravity sewer availability, capacity and the cost of extension or a pump station decide whether a rural North Georgia tract is a 20-lot subdivision or an 8-lot estate plat. Where septic is the answer, lot size, soils and reserve drainfield area control the layout, and a Level 3 soil report is required before design. Both paths are compared in sanitary sewer vs. septic for North Georgia subdivisions and septic design and Level 3 soil reports.
4. Streams, buffers, wetlands and floodplain
Georgia requires a 25-foot undisturbed buffer on state waters. Cherokee and Forsyth add a 50-foot undisturbed county buffer and a 75-foot impervious setback, measured from the stream or top of bank, not the property line. A creek through the middle of a 10-acre tract can take two or three acres off the table before floodplain is considered, and both counties regulate the future-conditions floodplain, which is larger than the FEMA map. Jurisdictional wetlands add Corps of Engineers permitting. The engineer should sketch these exclusions on the aerial before the offer.
5. Topography and the detention footprint
Slope drives grading cost, wall cost and the size of the pad you can build. It also drives where the detention pond has to go, because water runs downhill and the pond sits at the low point whether or not that is where you wanted a lot. Detention and water quality are sized to the Georgia Stormwater Management Manual and to each county’s addendum, and on small sites the pond footprint is a real fraction of the developable area. We sketch the pond on the concept before counting lots; the sizing logic is in detention pond design and sizing.
6. Soils and rock
Shallow rock in North Georgia turns utility trenching and pond excavation into blasting line items. Poor soils change pavement sections, wall designs and septic feasibility. A geotechnical reconnaissance during due diligence costs a fraction of a change order.
7. Water, power and gas
Confirm water main size and pressure for fire flow, the power provider’s service path and any gas availability. Off-site extensions are negotiable with the seller when they are known early.
8. Easements, encroachments and title exceptions
Transmission line easements, pipeline corridors, drainage easements and access easements for landlocked neighbors show up on the title commitment and the survey. Each one is a strip of land you own and cannot build on.
9. Trees and specimen trees
Cherokee, Milton, Alpharetta and the City of Atlanta all regulate tree removal with recompense or replanting requirements. A tract with heavy specimen hardwoods in the buildable area carries a cost that a tract of pines does not.
10. The permitting calendar
Forsyth takes plans on Mondays and holds review meetings nine business days later. Cherokee reviews through CityView in cycles of about five business days. Sketch plats, rezonings and variance hearings run on monthly agendas. The engineer who permits in these counties every month can give you a realistic date for the LDP, which is the date your construction loan and your lot sales depend on.
Negotiate the contract around the engineering
- Write the due-diligence period to fit the actual work: survey, soils, utility letters and a concept plan, not an arbitrary 30 days.
- Tie the price or a credit to specific findings: sewer extension cost, off-site road work, floodplain acreage, rock.
- Make rezoning, sketch plat or variance approval a closing condition when yield depends on it.
- Give your engineer the seller’s survey, plat, prior soil reports, zoning letters and any prior engineering before the clock starts.
How we structure that work during a contract period is described under due diligence engineering. Sellers who want to pre-package these answers can read pre-sale feasibility for sellers.
What this looks like in practice
Our Manor Estates case study shows a six-lot estate subdivision in Milton and how lot layout, utilities and stormwater were coordinated into one plan set. The goal of shopping with your engineer is that the permit set confirms the purchase assumptions instead of renegotiating them.
Frequently asked questions
Yes. The engineer identifies the limits that set yield and cost, zoning conditions, access, sewer or septic, buffers, floodplain, topography, detention and soils, before the price is fixed. After closing, those same limits come out of your margin.
Rapid desktop screening of candidate parcels, a go/no-go call with the limits marked on an aerial, full feasibility and concept plans on finalists, and support writing due-diligence contingencies. The team also carries forward what it learns about your product and your target counties.
It depends on volume. For a developer actively looking at multiple parcels, the retainer model avoids paying a full fee on every parcel that dies and shortens turnaround. For one or two parcels a year, a per-project report is usually sufficient.
Zoning problems are visible early and are often negotiable through rezoning, variances or conditions. Physical limits are not negotiable: no gravity sewer, septic soils that will not perc, or stream buffers and floodplain that remove the buildable area. Those are the ones to screen first.
Long enough for the survey, soils, utility availability letters and a concept plan with preliminary stormwater, and long enough to get on a hearing agenda if yield depends on a rezoning, sketch plat or variance. Set it from the work, not from habit.
Looking at land in Cherokee, Forsyth, Fulton or anywhere in North Georgia? Put our civil and stormwater team on the search before you make the offer. Contact Mack Engineering or call (770) 715-7295.
Related reading
- Feasibility reports
- What does a feasibility report and concept site plan cost?
- Site feasibility report before you buy land in Metro Atlanta
- Due diligence engineering in Atlanta
- Sanitary sewer vs. septic for North Georgia subdivisions
- Septic system design in Georgia: Level 3 soil reports and site limits
- Zoning exhibit requirements for Metro Atlanta rezonings
- Detention pond design in Metro Atlanta
- Land development services
- Case study: Manor Estates, Milton
- Pre-sale feasibility engineering for Georgia property sellers
- Forsyth County LDP plans: what you need to know
Sources
- Georgia EPD, NPDES construction permit fee fact sheet (per-acre fees that scale with disturbance)
- Cherokee County, Tree Preservation checklist (25-ft state, 50-ft county buffers, 75-ft setback)
- Forsyth County, Commercial Site Development checklist (50-ft buffer, 75-ft impervious setback, GDOT entrance approval)
- Forsyth County Code Chapter 46, Floodplain (future-conditions floodplain study)
- Atlanta News First, Forsyth County extends housing moratorium (Oct. 15, 2026)
This article is general information, not a site-specific engineering opinion. Code requirements and local ordinances change; confirm current requirements with the authority having jurisdiction for your property.