What does TRPA actually control when you buy a Tahoe property?

TRPA controls how much of your lot can be covered by impervious surface, what stormwater treatment you must install, and which trees you can remove. It does not regulate short-term rentals — that is Placer County, or Truckee, or the City of South Lake Tahoe, depending on where you are.

Almost every surprise I see in a Tahoe escrow traces back to one of three TRPA items: land coverage, BMPs, or trees. None of them are hard to check. All of them are expensive to discover late.

What is land coverage and how much am I allowed?

Between 1% and 30% of your lot, depending on its Bailey land capability district. Coverage means permanent land disturbance measured in square feet of impervious surface — roof, deck, driveway, parking, and compacted soil that no longer absorbs water.

TRPA prohibits new development on capability class 1 through 3 parcels and restricts coverage on 4 through 7. If you are buying a vacant lot in the basin, the Bailey score is not a detail — it is the entire question of whether you can build.

The distinction that costs people money is legally existing versus verified coverage. Coverage created before February 10, 1972 is grandfathered. Coverage after that date is legal only if it was permitted. “Verified” means TRPA staff physically confirmed it. Unverified coverage has no documented legal basis, and if you are planning an addition, unverified coverage is the thing that stops the project cold. Bailey scores for structures built before July 1, 1987 are often already on file at TRPA.

Can I buy more land coverage?

Yes, through the California Tahoe Conservancy Land Bank on the California side, or the Nevada Division of State Lands on the Nevada side. Expect up to 16 weeks for land coverage and up to 18 weeks for development rights — and you need an active building permit before they will process your application.

The Land Bank sells land coverage, restoration credit, existing and potential residential units of use, and commercial floor area. The process runs in a specific order: get your Bailey score and hydrologic area from the Parcel Tracker, then obtain an active building permit from your jurisdiction, then apply.

Transaction fees, as currently published: land coverage $350 administrative plus $755 per right in escrow; residential and commercial development rights $800 administrative plus $855 per right.

Where a parcel has more coverage than it is allowed, mitigation runs through five paths: on-site reduction, off-site restoration, an in-lieu fee (the route most projects take), parcel consolidation, or area-plan-scale mitigation.

Is a BMP certificate required to sell a Tahoe property?

Not exactly — but the deadline to install BMPs expired October 15, 2008, and non-compliance can carry fines up to $5,000 a day. More importantly for a buyer: the exposure transfers to you at closing.

TRPA requires every developed property in the basin, residential and commercial, to install and maintain Best Management Practices — stormwater controls engineered to infiltrate a 20-year, one-hour storm, roughly an inch of rain per hour.

There is no rule voiding a sale for lack of a certificate. What TRPA Code § 60.4.4.C does require is that the new deed holder submit a completed BMP real estate disclaimer form to TRPA within 30 days of sale. The form has three checkboxes: BMP Certificate, Source Control Certificate, or No Certificate.

Read that carefully, because it is the whole point: if the seller never installed BMPs, that is now your obligation, your cost, and your exposure. Thirty days after you take title, you are the one filing the form that says so.

Properties with high groundwater or shallow bedrock install source-control BMPs instead — soil stabilization and erosion prevention — and receive a Source Control Certificate. And certificates can lapse: TRPA states that certified properties fall out of compliance if BMPs are not functionally maintained, and evaluations completed before 2015 were valid only three years.

Check status on the Parcel Tracker. The BMP helpline is 775-589-5202.

Do I need a TRPA permit to cut down a tree?

Usually not any more. The threshold is 14 inches diameter at breast height, and trees at or under that size may be removed for defensible space without a TRPA permit or inspection.

This is the item where outdated information is most common, because an archived 2007 TRPA sheet says 6 inches and it still circulates. The current rules:

• Trees 14 inches DBH or smaller may be removed for defensible space without a TRPA permit or inspection.
• Trees larger than 14 inches that a forester or fire district has marked also do not require a TRPA permit.
• Dead trees near a house may be removed without a permit.
• The lakeshore exception: on lakeshore parcels, trees between the house and the lake require a permit if they are greater than 6 inches DBH. Non-lakeward trees on the same parcel keep the 14-inch threshold.

You still need a permit for trees planted or retained as a condition of a prior permit, trees in Stream Environment Zones or the backshore, substantial trimming of the upper two-thirds of a canopy, and any vegetation work in sensitive areas. The City of South Lake Tahoe does not issue defensible-space tree permits — contact TRPA directly there. TRPA’s forester is at (775) 589-5294.

What else surprises buyers?

Three things, in order of how often they derail a plan: scenic review if the property is visible from the lake, site plan requirements that demand a full coverage and tree survey, and development rights — you cannot build a new house without an allocation or a transferred residential unit of use.

Scenic review. If your property is visible from the lake or from a designated scenic corridor, additional site and design standards apply and you will be submitting color samples and contrast ratings for anything visible.

Site plan requirements. A single-family dwelling application has to plot trees over 14 inches DBH and rock outcrops, Stream Environment Zone boundaries and setbacks, building setbacks, height calculations, and coverage broken out by land capability district.

Development rights. New construction needs either a building allocation issued by your local jurisdiction, or a Residential Unit of Use transferred to the site. Placer County received 61 residential allocations in the 2025–2026 distribution. The basin-wide total across all five jurisdictions was 220, plus a 20-unit incentive pool. That is the entire basin for two years. It is not a lot.

Does TRPA regulate short-term rentals?

No. Local jurisdictions do. TRPA directs owners to Placer County, the City of South Lake Tahoe, El Dorado County, Douglas County or Washoe County depending on location.

TRPA’s only STR lever is indirect, and it is worth knowing about. In October 2019 the Governing Board added short-term rental neighborhood compatibility as a criterion in the Performance Review System that distributes residential building allocations. That is why Washoe County took two STR-related allocation deductions in the 2025–2026 distribution.

TRPA can’t fine your rental. It can reduce how many houses your county gets to permit.

Two parcel-level restrictions do touch STRs directly: TRPA bonus units cannot be used as vacation rentals, and Placer County’s workforce housing deed-restricted homes cap short-term rental use at 30 days a year.

What is the workforce housing deed restriction, and why does it matter at resale?

Placer County’s Workforce Housing Preservation Program offers down payment assistance up to 16% of purchase price, capped at $150,000, that does not have to be repaid — in exchange for a 55-year deed restriction that auto-renews with each sale.

The buyer needs at least 4% down from personal funds and a household member employed 30+ hours a week within Tahoe Truckee Unified School District boundaries. Restricted homes may be short-term rented a maximum of 30 days a year, or rented to qualified local workers. Only the East Placer program is currently funded.

What is TRPA working on right now?

Phase 3 — “Cultivating Community, Conserving the Basin” — a multi-year rewrite of the growth management system and development rights framework, carrying the first basin-wide environmental analysis since the 2012 Regional Plan Update.

The Governing Board reviewed draft policy categories in November 2025 and held a hearing January 28, 2026 on which policies advance to environmental review, with a public scoping period through March 16, 2026.

I have not confirmed what came out of that hearing or where the EIS stands today, so I am not going to characterize it. Check TRPA’s Phase 3 page for current status. Earlier housing amendments drew litigation from Mountain Area Preservation which settled; MAP has said it intends to hold TRPA to that settlement through Phase 3, particularly on the growth cap.

If you are buying land or planning a significant project in the basin, this is the file to watch. If you are buying a house to live in and rent occasionally, it is background.