On May 21, 2026, the Farragut Municipal Planning Commission spent part of its meeting redrawing two phases of one of the town's most expensive subdivisions. Bridgemore's developer, Placemakers No. 2 Partnership, needed to amend the concept plan and preliminary plat for Phases 3B and 4 because the northwest section of the property has sinkholes. The original 2021 layout called for a cluster of smaller lots with alley access and gridded streets in that exact spot. Once engineers got into the ground, that plan didn't hold up against what was actually there.
If you're shopping for a lot in Farragut and you see the word "sinkhole" on a plat, it's easy to read that as a warning label. The Bridgemore story says otherwise. This is a subdivision with homes that have sold well into seven figures, and it has eleven documented sinkholes across its footprint. The commission didn't reject the redesign. It approved the amendment unanimously, granted a variance for road length to fit the terrain, and in the process added roughly five more acres of open space to the plan. The sinkhole didn't kill the phase. It changed where the roads and lots go.
Karst Is the Default, Not the Exception
East Tennessee sits on karst geology, which means sinkholes, depressions, and underground drainage features show up regularly across the region, not just on unlucky parcels. Farragut's zoning code treats this as an expected condition rather than a rare defect, which is why the town has a standing Sinkhole Ordinance and a set of Open Space Residential overlay districts, labeled OSR and OSMR, built specifically to handle it.
The mechanism is straightforward. OSR and OSMR zoning caps overall density at 2.178 units per acre and requires that 35 percent of a subdivision's total land stay as open space. In exchange for that ceiling, developers get flexibility on individual lot sizes and placement, so they can shift homes away from a sinkhole or a ravine without losing their approved lot count for the project as a whole. The Bridgemore amendment is the overlay working as designed. Move the lots, keep the yield, add open space where the ground won't cooperate.
Several other subdivisions along the McFee Road corridor operate under the same rule:
| Subdivision | Zoning overlay | What's documented on the ground |
|---|---|---|
| Bridgemore | OSR or OSMR | Eleven sinkholes across the property, according to a longtime Farragut planning commissioner |
| Cottages at Pryse Farm | OSR or OSMR | A 2.4-acre sinkhole on the parcel |
| Meadows on McFee | OSR or OSMR | Multiple sinkholes noted in the subdivision footprint |
| The Grove at Boyd Station | OSR or OSMR | Sinkholes present; Phase 2 plat still moved forward in 2026 |
| Brass Lantern | OSR or OSMR | Zoned under the same overlay as its McFee Road neighbors |
None of these communities stalled out because of what's under the surface. They were designed around it from the start.
What the Overlay Actually Buys You
The trade-off built into OSR zoning is worth understanding if you're evaluating a lot rather than just a finished home. A developer working under this overlay can't fill in a sinkhole and build over it. The ordinance protects the feature and routes construction around it instead, which is part of why these subdivisions tend to have more preserved greenspace, ponds, and wooded buffers than a standard flat-graded development would.
A separate example from a 2023 land review makes the engineering side concrete. A 55-acre parcel along McFee Road had a ravine running north to south through it. The fix wasn't complicated: a properly sized stormwater pipe goes into the ravine, fill dirt goes above it, and the road gets built on top. That approach runs under roads across Farragut already. The developer eyeing that parcel for an expansion of Meadows on McFee had already stubbed a street, Wild Basil Street, to the property line in anticipation, and treated the tree cover, the ravine, and a noted sinkhole as routine site conditions rather than reasons to walk away. Under OSR zoning, that same 55-acre tract could support up to 119 homes.
The pattern holds across the corridor. A karst feature changes the site plan. It rarely changes whether the site gets built.
The Plat Note Isn't the Same as a Geotechnical Report
Here's the distinction that actually matters if you're the one writing an offer. A plat can say "sinkhole" without anyone having run a geotechnical study to confirm it. One documented case involved a depression on a McFee Road parcel that a filed plat labeled a sinkhole, but historical aerial photos suggested it might have originally been a farm pond. Nobody could say for certain which it was without a geotechnical analysis, because the plat notes referenced the feature but not a report verifying it.
That gap is exactly where a buyer's due diligence should focus. Before you write an offer on a lot in Bridgemore, Cottages at Pryse Farm, Meadows on McFee, or any other OSR-zoned parcel in this corridor, a few checks are worth the time:
- Pull the recorded plat for the specific lot through KGIS.org, Knox County's public geographic information system, and read the plat notes directly rather than relying on a listing summary.
- Ask whether a geotechnical report exists for that lot or that phase, not just a general reference to karst conditions on the plat.
- Confirm which overlay district governs the parcel, OSR or OSMR, since that determines the density cap and open space requirement that shaped the lot layout around you.
- Check the phase and plat approval history with the Town of Farragut's Planning and Zoning office, which tracks sinkhole ordinance interpretations alongside standard zoning questions.
None of this requires a specialist. It requires knowing that "sinkhole" on a document is a starting point for a question, not a finished answer.
Five Years Between Plan and Approval
The Bridgemore timeline is a useful reminder that these approvals rarely move in a straight line. The preliminary plat for Phases 3B and 4 first came before the Planning Commission back in October 2021, then again in December 2022, with no action taken either time because the developer and the town disagreed over requiring a letter of credit to guarantee a public street connector road and improvements to Allen Kirby Road. That disagreement, not the sinkholes, is what stalled the phases for years. The topography and karst issues only became the active problem once the project moved forward again in May 2026, at which point the fix was a redesign, not a rejection.
The same meeting that approved Bridgemore's amendment also cleared a final plat revision for Stonemeade, a subdivision off Boring Road next to the new Farragut Area Elementary School and the Villages of Farragut. Replats and phase adjustments are a normal part of how this town's newer subdivisions come together. If you're watching a specific development and a phase seems to stall or shift, financing terms and infrastructure agreements are just as likely a cause as anything geological.
The Actual Takeaway for Lot Buyers
A sinkhole note on a Farragut plat tells you which zoning overlay governs that lot and what kind of engineering already went into placing the home site around it. It does not tell you the lot is compromised, and in a subdivision like Bridgemore, it may sit alongside some of the highest home values in town. The lot buyers who get surprised at closing aren't the ones who found a sinkhole on the plat. They're the ones who never asked whether a report backs it up.
A Few Questions Worth Asking First
Does a documented sinkhole lower a lot's value in Farragut? Not on its own. Bridgemore's continued development and price points show that OSR zoning is built to absorb these features without limiting a subdivision's overall desirability.
What's the practical difference between OSR and OSMR zoning? Both cap density at 2.178 units per acre and require 35 percent open space, and both exist to give a builder flexibility in lot placement around sinkholes and similar features. Which one applies to a given subdivision is a detail worth confirming with the Town's Planning and Zoning office rather than assuming from the neighborhood name.
How do I find out if a lot has a documented sinkhole before I make an offer? Start with the recorded plat on KGIS.org, then ask the seller or builder directly whether a geotechnical report exists for that lot or phase. A plat note and a verified report are two different levels of certainty.
Should I get my own geotechnical inspection even if the plat doesn't mention anything? For a custom build or a lot in one of the McFee Road OSR subdivisions, it's a reasonable step regardless of what the plat says, since not every depression gets flagged before construction begins.
If you're looking at land or a custom build anywhere along the McFee Road corridor, or trying to make sense of a plat that raises more questions than it answers, Mandy B. Street grew up around construction, not just closings. Reach out and get a straight read on what a lot's paperwork actually means before you're standing in front of a foundation crew asking the same question.
