San Gabriel Valley · Zoning
Zoning rules that shape San Gabriel Valley ADUs
State ADU law sets the floor everywhere in California. San Gabriel Valley layers local rules on top — overlays, hillside ordinances, design districts. Here's what tends to control the envelope on a San Gabriel Valley parcel.
Local overlays and ordinances
- Pasadena RS / RM zones — state ADU law applies; Landmark Districts add design review.
- Glendale R1 — state law floor; ROW dedications occasionally required.
- Burbank R1 — straightforward ministerial review.
- Arcadia, South Pasadena: smaller departments, longer counter waits.
What state law guarantees
- Up to 1,200 sqft for a detached ADU on most R1 lots.
- Up to 500 sqft for a JADU inside the existing footprint.
- No parking requirement within ½ mile of major transit.
- 60-day ministerial review on a complete application.
How we map your lot
Before drawing, we pull the parcel against the county GIS, the city zoning map, and any overlay layers (HPOZ, hillside, coastal, fire). The first site walk tells us within an hour whether the project is ministerial or whether anything kicks it into discretionary review.
Foreman's notebook · San Gabriel Valley
What we know walking onto a San Gabriel Valley lot
- From Mid-City yard
- 26 min
- Jobs finished here
- 22
- Build window
- April–October. Santa Ana winds in Oct slow tile-setting.
Today's daylight window
Sunrise
5:51 AM
Golden hour
7:30 PM
Sunset
8:06 PM
Day length
14h 15m
Permit counter
Pasadena Permit Center
175 N Garfield Ave, Pasadena, CA 91101
Phone
(626) 744-4633
Hours
Mon–Thu 7:30am–5:30pm
Our typical wait: 8–12 weeks ministerial
Site
Mostly flat alluvium. Oak trees dictate the building envelope more than zoning.
Crane / staging
Full crane on most streets. Bungalow Heaven needs tree-protection plan first.
Crew spot
Copa Vida — Pasadena
City dossier · the 20 things we track
- Locals call it
- SGV / 626
- Architectural DNA
- Craftsman bungalow · Spanish revival · Greene & Greene
- Our signature spec
- Rough-cut cedar trim · clay tile · river rock veneer
- Fire hazard zone
- Moderate (foothills VHFHSZ)
- Nearest fault
- Raymond Fault · 0.8 mi
- Title 24 climate zone
- Title 24 Zone 9
- Median lot
- 7,100 sf
- Typical setbacks
- 5ft side · 15ft rear
- New 1BR ADU rents
- $2,500–$3,100 /mo
- Resale lift w/ ADU
- +9–13%
- Iconic landmark
- Rose Bowl · 2.4 mi
- Street sweeping
- Wed (Pasadena alternating)
- Trash / dumpster day
- Friday (Athens / city)
- Solar yield
- 1,730 kWh / kW · yr
- Avg summer high
- 91°F
- Avg winter low
- 46°F
- Lots inside an HOA
- 8%
- Nearest ER
- Huntington Health — Pasadena
- Jobsite radio
- AM 1300 Mandarin + KPCC 89.3
- Protected trees
- Coast live oak (>8" DBH) · CA sycamore · deodar cedar
- Crew lunch spot
- Lunasia Dim Sum — Alhambra
10 things we already know about this area
- Pasadena Historic Preservation overlay covers Bungalow Heaven + Garfield Heights.
- Landmark District ADUs go through Design Review — add 6–10 weeks.
- Arroyo Seco overlay restricts tree removal — every oak >8" DBH protected.
- South Pas + San Marino do their own plan check — slower than Pasadena city.
- Alhambra has fast online submittal; Monterey Park is paper-only on ADUs.
- Pasadena Water & Power service drop is faster than LADWP by 2–3 weeks.
- Pre-1940 craftsman framing — full-dimension 2x4s. Spec rough-cut on additions.
- Many SGV lots have detached garages with old GFCI — full sub-panel often required.
- South Pas walks the line on impervious coverage — drywell required on most ADUs.
- San Marino requires HOA-style architectural review on top of city permit.
Material yards we call here
- Pasadena Reclaimed — salvage · lumber
- Anawalt Lumber — Pasadena · lumber
- Ganahl Lumber — Pasadena · lumber
Recent jobs
- N Oakland Ave · Craftsman-matched detached 2BR
870sf · 24 weeks · 2 mo ago - Indiana Ave · Garage + workshop ADU
550sf · 17 weeks · 8 mo ago
"SGV asks you to match the original house. We carry sample 1920s trim profiles in the truck."
28 things we track for every San Gabriel Valley job
What changes when the lot is in San Gabriel Valley
Same plans drawn three miles apart can cost $80k different. These are the local conditions, ordinances, soils, utilities, and crew realities that decide the number. We update this from our own jobs and the city counter.
Regulation & permits
- Noise / construction hours
- Mon–Sat 7a–8p Pasadena · 7a–7p Arcadia · no Sun · Sierra Madre: 8a Sat
- Historic overlay
- Pasadena: Bungalow Heaven, Garfield Heights, Lower Arroyo · Mills Act available
- Parking / dumpster permit
- Each city different · Pasadena = 7 biz days, $185/wk · San Marino requires neighbor sign-off
- Demo diversion mandate
- Pasadena: 75% · Arcadia: 65% · Athens/Burrtec haul-off
- School impact fees
- PUSD: $4.79/sf · Arcadia USD: $5.34/sf · San Marino USD: $5.45/sf (highest in SGV)
- Prop 13 reassessment
- ADU under 750sf: no reassessment · Pasadena recent re-eval audit on permits
- Zoning trajectory
- Pasadena ADU-friendly · SB9 in most cities · Arcadia mansionization ordinance
- ADU pre-approved plans
- Pasadena ADU pre-approved plans (6 wk) · San Gabriel + Alhambra emerging
Site & geology
- Soil type
- Alluvial fan + decomposed granite — well-draining · post-tension on plastic clays in Alhambra
- Water table
- 60–120 ft typical · seasonal Arroyo Seco influence
- Foundation pier depth
- 8–12 ft typical · 14 ft on foothill alluvium
- Subsurface conflicts
- Old Pacific Electric ROW · abandoned wells under San Gabriel Blvd corridor
- Wildlife / habitat mitigation
- Bear in foothills (Arcadia, Sierra Madre) · raptor nests in heritage trees
- Seasonal risks
- Foothill fire (Eaton Canyon) Sep–Jan · debris flow after burn · 100°F summers
- Street / delivery access
- Mostly wide (36 ft) · Pasadena alleys often usable · concrete pump 90% of jobs
- Airport / flight-path noise
- BUR + EMT (El Monte) approach · helicopter from Pasadena PD
Utilities & energy
- Utility upgrade wait
- PWP (Pasadena): 6–10 wk 200A · SCE: 10–16 wk · Glendale Water & Power separate
- Seismic retrofit history
- ~45% of pre-1978 multifamily · Pasadena URM ordinance retrofit complete
- NEM 3.0 / solar export
- Pasadena PWP: separate NEM (better than SCE) · ~$0.10/kWh export · solar still ROIs in 6–8 yr
- Pool permit reality
- Common · 8–12 wk schedule · arroyo lots = special drainage detail · spa + pool 50% of asks
Culture & crew
- Local salvage / reclaimed
- Pasadena Architectural Salvage (Raymond Ave) · The Reclaimers (Eagle Rock)
- Color / palette rules
- Pasadena HPOZ palettes (Federal Std 595) · Bungalow Heaven = period-correct paint scheme
- Theft risk on jobsite
- Catalytic converters Alhambra/Monterey Park · tool theft moderate · gated estates safer
- Sub-contractor ecosystem
- Strong: Craftsman restoration, art-tile, plaster · Chinese-speaking crews (Alhambra/SG)
- Tree protection fines
- Pasadena landmark tree: $25k + 6:1 · San Marino oak: $15k + 4:1 · Arcadia: $5k
- Jobsite language
- Spanish + Mandarin + Cantonese · framing Spanish · finish/tile Mandarin in Alhambra/SG
Money & momentum
- Top cost surprises
- Historic review ($8–18k delay) · landmark tree protection fencing ($4–9k) · sewer lateral (PUSD area $6k)
- Permit boom indicator
- ADU +44% YoY · whole-house remodels +19% · Asian-buyer driven new builds in Arcadia
Sources: city counter notes, our own permit logs, CalRecycle, CA Title 24, DOGGR, CAL FIRE FHSZ, USGS Q-Fault, PG&E / SCE / LADWP rate sheets, school district fee schedules. Last reviewed by our PMs this quarter.
Zoning in La Sgv: we'll cost yours from comparable jobs on your zip.
- Pulled from real La Sgv permits in the last 18 months
- No 'national average' nonsense
- We hand you the comparable addresses
Free · 48-hour turnaround