Every Beverly Hills owner knows land is a huge share of a 90210 estate’s value, and many assume that “most of the value is land, so there’s nothing to depreciate.” That is the exact misread. Land itself is non-depreciable, but the improvements sitting on that land are legally distinct from the land and are largely 15-year land improvements, not land. On a trophy estate the pool, spa, sport court, motor court, stone terraces, perimeter walls, specimen landscaping, irrigation, and drainage can represent an outsized dollar amount precisely because it is a high-end site, and that is the depreciable, accelerable bucket a standard 39- or 27.5-year straight-line schedule buries. The grander the grounds, the larger the 15-year reclassification.
Want a number for a specific Beverly Hills property? Use the calculator. It is pre-set with property-type defaults you can adjust to match your basis and tax bracket.
Cost Segregation in Beverly Hills, CA
The ban defines the audience, it does not remove the deduction
Beverly Hills adopted a short-term-rental prohibition effective September 5, 2025, requiring a 12-month minimum lease citywide. That does not weaken cost segregation, it just channels the audience toward exactly the two groups cost seg serves best here: luxury estates held as long-term or executive rentals, and luxury multifamily in and around the business triangle. Cost segregation applies to any income-producing property, and a home on a 12-month lease is a placed-in-service income-producing asset. Whether the resulting losses are usable this year is a separate §469 question for your CPA.
The grounds are the story
The hero of a Beverly Hills study is the estate grounds reclassified as 15-year land improvements, distinct from both the building shell and from non-depreciable land. An engineering study identifies named components from plans, permits, and photographs: gunite pools and raised spas, pool houses and cabanas, tennis and sport courts with their fencing and lighting, motor courts and paver driveways, stone terraces and patios, perimeter site walls and security gates, specimen landscaping with elaborate irrigation, site drainage and retaining walls, fountains, and landscape lighting. A conservative 5-year layer of genuine equipment sits on top: high-end appliances, backup generators, EV charging, pool and spa mechanical equipment, and FF&E in furnished executive rentals.
Aggressive 5-year treatment of decorative lighting and cabinetry is contested (AmeriSouth) and CPA-gated, so we keep those conservative and never headline them. On a trophy estate the defensible, high-dollar story is the grounds.
California hands you a second depreciation schedule
Get this exactly right, because it is where national pages gloss over. California does not conform to federal §168(k) bonus depreciation and did not adopt the 2025 federal law that restored 100% bonus. SB 711, signed in October 2025, moved California’s conformity date to January 1, 2025, which predates and excludes that change, so bonus is added back on the California return. California also caps §179 at $25,000. One engineering study feeds two schedules: federally, the reclassified 5-, 7-, and 15-year property is eligible for 100% bonus; for California, the same property is depreciated on accelerated MACRS over its shorter lives. California still benefits, as timing acceleration versus straight-line, not a first-year lump. See bonus depreciation by state, and your CPA maintains the separate California records.
Worked example (modeled)
Consider a Beverly Hills estate held as an income-producing rental, acquired for $9,000,000. Every figure here is a modeled illustration, not a measured result or a promise; your study and CPA determine the actual amounts.
90210 land is a very high, property-specific share of value, so land comes out first (set from the actual assessor, appraisal, or §1060 allocation, never assumed). That leaves a depreciable building basis of roughly $4,050,000. An engineering-based study commonly reclassifies 20–28% of building basis into shorter recovery periods, and a grounds-heavy estate sits at the upper end. Modeled at about 28%, that is roughly $1,134,000 reclassified: on the order of $700,000 of 15-year land improvements (pool, sport court, motor court, terraces, walls, landscaping), $420,000 of 5-year personal property (kept conservative: FF&E, appliances, equipment), and a small 7-year slice.
Under 100% bonus, that reclassified amount is deductible in year one on the federal return. At a 37% bracket the modeled first-year federal tax reduction is about $420,000. For California it is added back and depreciated on accelerated MACRS, and if the loss is passive it suspends under §469 and releases at sale. Treat the federal figure as a timing benefit, not a permanent elimination of tax.
Done remotely, no site visit
The study is engineering-based but conducted remotely from plans, permits, closing and appraisal detail, and photographs of the grounds and finishes. There is no on-site visit. We use industry-standard, nationally recognized construction cost data to support the component allocation. See how remote cost segregation works and what a cost segregation study is.
Beverly Hills submarkets
- The Flats: large lots below Sunset with established estates, mature landscaping, pools, and motor courts, so high 15-year land-improvement potential and classic executive-lease inventory.
- Trousdale Estates: hillside modern trophy estates on sloped lots, where pools, terraces, retaining walls, and site drainage drive the reclassification.
- Benedict Canyon and the Beverly Hills Post Office area: gated compounds with long private drives, guest houses, generators, and irrigation. Note that a BHPO address is a postal designation, not the incorporated city, so jurisdiction and the short-term-rental ordinance differ; confirm the parcel.
- Business Triangle multifamily: luxury apartment and condo-rental buildings where the audience shifts to multifamily cost seg (5-year FF&E, 15-year site improvements, garages, elevators, amenity decks).
Learn more about cost segregation
- Remote cost segregation: how an engineering-based study is delivered without a site visit
- What is cost segregation?: the full explanation of how the study works and what you receive
- Bonus depreciation by state: how California non-conformity affects timing
- Material participation for STR owners: passive vs. non-passive losses and the §469 rules
- By property type: multifamily, single-family rentals, short-term rentals, warehouse & industrial
Ready to see your actual Beverly Hills numbers?
Want a number for a specific Beverly Hills property? Use the calculator, or start a preliminary analysis. Figures on this page are modeled illustrations; your study and CPA determine the actual amounts.
CPA use note: These figures estimate the size of the depreciation deduction. Whether the loss is usable in the current year depends on passive-activity rules, STR material participation, REPS status, entity structure, depreciable basis, and state conformity. Your CPA decides how and when it is applied. Specialty and site components (equipment, casework, docks, pools, arenas, tenant improvements, and similar) are only classified when you own them and they are included in the depreciable basis being studied.
How should Beverly Hills, CA investors choose a cost segregation provider?
For a Beverly Hills, CA investor buying a property in the $9,000,000 range, the choice of provider is a major controllable variable in the return. The IRS Audit Techniques Guide sets the quality characteristics an engineering-based study should meet — industry-standard construction cost data, MACRS classification, and component-level documentation — but it does not make every provider's work identical; rigor, cost, and turnaround still vary.
Traditional engineering studies often run several thousand dollars and can take several weeks, because they include on-site inspections, sales discovery calls, and scheduling overhead. The IRS Cost Segregation Audit Techniques Guide does not prescribe an on-site inspection as a standalone requirement; it sets out the quality characteristics of an engineering-based study — component-level classification, a documented and supportable cost derivation, and a clear audit trail — and describes how a physical inspection can contribute to meeting them.
Modern automated providers (such as Cost Seg Smart) deliver an engineering-based, IRS ATG-aligned study using property records, documents, photos, and recognized construction-cost data, typically from $495 and often the same day. For a Beverly Hills, CA investor at a high combined bracket, that cost and speed difference is meaningful. The CPA-Ready Guarantee (full refund if the report can't be used by your CPA) plus the 60-day money-back policy makes the decision essentially risk-free on the report itself.
The automated path is best-fit for owners who can provide closing documents and property photos online (no in-person visit required) and want the report in time to file the current year's return rather than the next one.
All Cost Seg Smart studies include the CPA-Ready Guarantee (full refund if your CPA can't use the report) plus a 60-day money-back policy. Straightforward residential studies are often delivered the same day and completed remotely; larger or more complex commercial studies take longer and may include an on-site observation.