Denver cost segregation FAQ
Can I run a Denver investment property as a short-term rental?
Generally not in Denver city limits. The City and County of Denver's STR ordinance restricts short-term rental operations (stays under 30 days) to a host's primary residence with annual registration. Non-primary-residence absentee STR operation is largely prohibited within Denver. Adjacent Jefferson County (Lakewood, Wheat Ridge, Arvada, Golden) has no equivalent restriction, Jefferson County properties can be operated as STRs without the primary-residence requirement. The typical Denver-investor STR strategy is to keep Denver-proper acquisitions as LTRs (fix-and-flip, small MF, ADU rental) and run any STR-loophole-eligible properties out of mountain feeder markets (Breckenridge, Steamboat Springs, Estes Park) or adjacent jurisdictions where the ordinance doesn't apply.
Does the Denver ADU expansion meaningfully affect cost segregation strategy?
Yes, and ADU additions are one of the more cost-seg-friendly Denver investment moves. The 2018 Denver ADU zoning amendment (expanded in 2023 to permit ADUs in all SFR zones citywide) unlocked detached and attached ADU construction across LoHi, Berkeley, Park Hill, and Sloan's Lake. New ADU construction costs add to your depreciable basis as a distinct asset, and a cost-seg study can identify 5/7/15-year components separately from the 27.5-year structure. ADU projects with $180K–$350K construction costs typically produce $35K–$80K of Year-1 federal-plus-state acceleration at top brackets. Note: ADUs in Denver city limits must be operated as LTRs to avoid the primary-residence STR restriction, but they fit cleanly within standard §469 rental treatment.
How does Colorado's federal conformity affect cost-seg savings for a Denver buyer?
Cleanly. Colorado computes state taxable income starting from federal taxable income and applies the flat 4.40% rate, there's no Colorado-specific bonus depreciation addback or modification for §168(k) acceleration. For a Denver owner taking $80,000 of accelerated reclassification at the 37% federal bracket, federal Year-1 savings is $29,600. Colorado Year-1 savings at 4.40% is $3,520. Both captured the same tax year, no addback, no decoupling math. Combined Year-1 acceleration: $33,120, or 41.4% of the accelerated reclassification dollars. This is materially cleaner than California (decoupled, only the federal portion accelerates in Year 1) and worse only than no-state-income-tax states (Texas, Florida, Tennessee, Nevada, Washington, Wyoming).
Why does cost segregation work particularly well on LoHi 1920s bungalow renovations?
Because the renovation cost pool drives the reclassification math more than the original structure. Original 1920s LoHi bungalow construction (basic stick-frame, plaster-on-lath, original plumbing, original knob-and-tube electrical) doesn't reclassify meaningfully, most of the original shell falls into the 27.5-year residential category. But these properties typically have $200K–$500K of post-2010 renovation layered on: full electrical upgrades with new panels and rewiring (significant 5-year portion), kitchen and bathroom gut-renovations (FF&E 5-year, fixtures 5-year), HVAC additions (5-year and 27.5-year mixed), deck and hardscape additions (15-year), and high-density FF&E from STR-furnishing-pattern renovations (5-year). The engine treats renovation_cost as a separate allocable pool with its own MACRS distribution, for a heavily renovated LoHi bungalow, that pool often contributes 60–80% of the total accelerated component.
Should I do cost-seg on a single Denver SFR rental, or wait until I have multiple properties?
Single-property cost seg works at Denver's typical price point ($550K+ purchase), the $495–$1,495 Cost Seg Smart fee is small enough that even moderate Year-1 federal-plus-state savings ($15K–$40K range) produce strong ROI on the study. But there's a multi-property compounding effect: portfolio investors running 3+ Denver acquisitions per year get more value per study because the marginal study fee is small against the cumulative deductions, and the §469 passive-loss treatment across the portfolio integrates more cleanly. For a first single-property buyer at the $550K–$850K Denver price band, the study makes sense as a standalone economic decision; for a portfolio operator with 3+ acquisitions annually, cost seg becomes a default part of every closing.
More general cost-seg questions answered at costsegsmart.com/faq/.
