How Transmission Lines Impact Property Values (With Data)
Our model applies a voltage- and distance-based discount near high-voltage transmission lines. Here's how proximity can affect value - and how AVMLens accounts for it.
These adjustments come from screening procedures James Newgent developed over 30 years and $4B+ of residential acquisitions and dispositions.
High-voltage transmission lines are a significant and often overlooked factor in property valuation, and one that many buyers weigh.
AVMLens models how much transmission lines affect property values based on distance and voltage.
The Data: Discounts by Distance
Illustrative discount ranges by distance for 230 kV+ lines (the low end is a 230 kV line, the high end a 500 kV line):
As an illustration, a 9% adjustment on a $400,000 home is $36,000. The AVMLens model computes a specific adjustment for each property from the line's voltage and the distance, so the figure for a given home can be higher or lower than these ranges. For example, at 100 feet it works out to about -8.7% for a 230 kV line and about -10.8% for a 500 kV line.
Voltage Matters
Not all transmission lines are equal. Higher voltage lines have larger towers, more visual impact, and stronger electromagnetic fields - all of which increase the discount:
| Voltage Class | 100 ft | 300 ft | 600 ft | 1,000 ft |
|---|---|---|---|---|
| 500 kV and up | 10.8% | 7.4% | 4.2% | 2.0% |
| 230-499 kV | 8.7% | 5.4% | 2.7% | 1.0% |
| 115-229 kV | 5.3% | 3.1% | 1.4% | 0.5% |
These are the AVMLens model's adjustments: an approximation built from underwriting experience, not measured sale prices. 765 kV lines fall in the top tier.
Why AVMs Miss This
Traditional automated valuation models compare your property to recent comparable sales. Unless transmission line proximity is modelled explicitly, comps near a line and comps away from one can be mixed together.
If a house near a transmission line sells for $380,000, the AVM might use that as a comp for a similar house half a mile away that isn't near any lines. The result? The second house gets undervalued.
Conversely, if comps are pulled from properties away from lines, the AVM overvalues the house near the transmission line.
We identify transmission lines using utility infrastructure data and calculate exact distances to each property. Our geo-risk layer then applies appropriate adjustments based on voltage and proximity, giving you a risk-adjusted value rather than a naive estimate.
What Buyers and Sellers Should Know
For Buyers:
- Use transmission line proximity as a negotiating point
- Consider long-term resale: the discount will apply when you sell too
- Higher voltage = more impact. Check the voltage class, not just presence
- Easements may restrict what you can build on your property
For Sellers:
- Price realistically - overpricing leads to extended days on market
- Highlight other positives that offset the location
- Be prepared for buyers to bring up the lines during negotiation
The Perception Factor
Beyond measurable impacts, there's a significant perception factor. Many buyers notice towers on a first visit, and some rule a house out before going inside. That shrinks the pool of buyers, which is part of why homes near lines tend to sell for less or take longer.
Bottom Line
Transmission lines can affect property values. If you're analyzing a property within 500 feet of a 230 kV or higher line, consider a discount in the illustrative 3-13% range before relying on any AVM estimate, or run the address to see the model's figure for that line's voltage and distance.
Better yet, use a valuation tool that accounts for these factors automatically.
Check transmission line proximity on any property
AVMLens scores 12 geo-risk factors including transmission lines, railroads, and flood zones — with distance-based valuation adjustments.
Try AVMLens Free