BHO (Baseline Hillside Ordinance)
City of LA ordinance regulating size, grading, and access on hillside lots.
The Baseline Hillside Ordinance applies to City of LA single-family lots with average slopes of 15% or greater. It caps maximum floor area, grading quantity, and lot coverage based on slope band, and triggers haul-route review for any project that imports or exports more than 1,000 cubic yards of soil.
BHO compliance adds 6–12 weeks to plan check and typically 15–30% to detached ADU cost because of foundation and access constraints.
Related terms
- ADU (Accessory Dwelling Unit)A self-contained second home on a residential lot, with its own kitchen, bath, and entrance.
- LADBS (LA Dept. of Building & Safety)The City of LA's plan-check, permit, and inspection authority.
- Soils Report (Geotechnical Report)A licensed engineer's analysis of soil bearing capacity, expansion, and seismic risk.
People also ask
FAQ — BHO (Baseline Hillside Ordinance)
What does "BHO (Baseline Hillside Ordinance)" mean in plain English?
City of LA ordinance regulating size, grading, and access on hillside lots. Browse the full construction glossary for related terms.
Why does BHO (Baseline Hillside Ordinance) matter for a California ADU or remodel?
BHO (Baseline Hillside Ordinance) comes up in the zoning and land-use side of nearly every Greater LA and Bay Area project we touch. The Baseline Hillside Ordinance applies to City of LA single-family lots with average slopes of 15% or greater. Getting it right at design saves rework later — getting it wrong is one of the most common reasons permits stall. See how it lands in our five-phase process and the relevant field guides.
Where will I see BHO (Baseline Hillside Ordinance) on my own project?
Most owners run into BHO (Baseline Hillside Ordinance) during the design or plan-check phase — specifically inside schematic design or permit submittal. Your project manager flags it on the schedule, walks you through what the city expects, and confirms documentation is in place before the inspection that depends on it.
Does BHO (Baseline Hillside Ordinance) cost extra?
Sometimes — depends on whether it adds scope (a report, a structural detail, a fee) or just a paperwork step. Anything cost-impacting is itemized in your contract or change order, never buried in the invoice. Sanity-check your number with the ADU cost calculator and the 2026 cost report.
Who at Alpha Dream handles BHO (Baseline Hillside Ordinance)?
The project architect owns design-level decisions; the permit runner owns city interactions — see the California permit directory; the project manager owns field execution. You always know who to ask. Start a conversation on the contact page.
When does BHO (Baseline Hillside Ordinance) typically come up in the project schedule?
Most often during permit submittal or early construction. The full sequence is on the process page.
Is BHO (Baseline Hillside Ordinance) handled differently in LA vs the Bay Area?
Yes — local interpretation varies. The LA studio and Bay Area studio note the regional shifts on each city hub.
What documents prove compliance with BHO (Baseline Hillside Ordinance)?
City-specific — the California permit directory lists the form set per jurisdiction. Field journal entries show what actually clears plan check.
Which trades or consultants own BHO (Baseline Hillside Ordinance) on a typical job?
Architect, structural engineer, or Title 24 consultant — depends on the term. The process page maps roles across the five phases.
How does BHO (Baseline Hillside Ordinance) affect the project budget?
Direct line item in the contract when it triggers a report, detail, or fee. Pricing bands are in the 2026 cost report.
Has BHO (Baseline Hillside Ordinance) changed recently under California law?
California ADU and remodel law has shifted every legislative session since 2017. Material changes land first on the field journal; definitions update quarterly here.
Where can I read the underlying statute for BHO (Baseline Hillside Ordinance)?
Each glossary entry cites the relevant Gov Code, building code section, or city bulletin. The permit directorylinks the source portals.
Which ADU type is BHO (Baseline Hillside Ordinance) most relevant to?
Cross-references live on the ADU types index. The term often appears in detached ADU and JADU contexts most.
Can I send BHO (Baseline Hillside Ordinance) questions to your team?
Yes — use the contact page. We add the most-asked questions to the site-wide FAQ monthly.
What's a related term I should also read after BHO (Baseline Hillside Ordinance)?
Each entry cross-links 3–5 related terms. Browse the full set on the glossary index.
Plain EnglishOff-site · Leo replies tonight
Need "Bho" explained against your project?
- Pull up your plans, we'll mark them up live
- No jargon, no sales pitch
- Free, even if you never hire us
Free · Phone or Zoom