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Carter County, MT · Sold

MT-888208

3621 County Road 129

$865,500
$1,617/ac · 535 ac
Acreage535 ac
Price per acre$1,617/ac
ZoningAgricultural
Road accessLandlocked
UtilitiesFull utilities
TopographyRolling
ListedOct 23, 2023
Coordinates45.5382, -104.5830
Loading terrain…
County GIS boundary

We do not yet have an active public ArcGIS connection for this county. Use the official source link to verify the parcel boundary and flood/zoning layers.

County market

Carter County, Montana. Big-sky ranch splits; recreational amenity value increasingly outruns ag value.

View Carter market data →

Step 1 · Is this a deal?

Due diligence

1 item to verify before you offer.

Risk index
33
Moderate risk
Wetlands6.4% of tract

Little to no mapped wetland coverage.

Average slope8.4%

Gentle grade, straightforward to develop.

Flood zoneX

Outside the mapped floodplain.

Legal accessLandlocked

No legal access of record — resale is severely limited.

PowerOn site

Power at or near the road.

Buildable area475.85 of 535.14 ac

Net of wetlands and slope constraints.

Step 2 · Where do the numbers land?

Adjusted value estimate
$1,099,678
$938,736$1,260,621 · $2,055/ac on 535 ac
Asking vs estimate
-21.3%
Priced below the comp set

Weighted from 6 recorded sales, adjusted for tract size, access, utilities and time since sale. Range width reflects dispersion across the comp set.

AI deal brief

Comps, diligence flags, an offer number and what to ask the seller.

Offer calculatorAsking $865,500
Maximum allowable offer
$628,388
$1,174/ac · +30.0% target margin

You need $237,112 off asking to hit this margin.

All-in cost$681,801
Net resale$1,011,704
Projected profit$329,903
ROI+48.4%
Annualized+69.2%
Break-even resale$1,385/ac
Profit if resale lands off target
-20%
$127,562
-10%
$228,733
0%
$329,903
+10%
$431,074
+20%
$532,244
Comparable sales6 matches
ParcelAcresSoldPrice$/acAdj $/acDistMatch
MT-759198
Landlocked · Off grid
1096.3Sep 4, 2025$1,129,7001,0301,91810.8 mi
66
MT-636129
Gravel · Full utilities
118.7Jul 27, 2026$647,7005,4582,42610.7 mi
65
MT-216095
Gravel · Off grid
115.8Nov 2, 2025$295,3002,5501,6663.7 mi
61
MT-565540
Dirt · Power at road
77.5Feb 17, 2025$313,3004,0452,4383.7 mi
55
MT-675990
Gravel · Off grid
107.3Mar 28, 2024$278,4002,5941,77112.0 mi
53
MT-405362
Paved · Off grid
68.1Aug 6, 2024$280,2004,1152,1093.5 mi
52
Show adjustment detail for the top comp
  • Tract size (1096.32 ac → 535.14 ac)+24.7%
  • Utilities (Off grid → Full utilities)+43.5%
  • Market time (11 mo)+4.0%

Step 3 · Market it

Turn this underwriting into a listing

Generate a comp-priced headline, listing description, land-group post and cash-buyer email for this tract — then post it to the investor marketplace.