“Lior is very personable and has many decades of construction experience. We appreciated his sincere evaluation of our project.”
Ann AnterasianHouzz · April 2019
ADU construction · Pasadena, CA
Pasadena ADUs for
Historic Streets and Deep Lots
Craftsman-era properties with rear garages built for conversion, landmark districts with their own review, and the city's own permit desk. We build ADUs Pasadena's way. CSLB #972213.
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CSLB LicensedLicense #972213
5.0 on Houzz17 verified reviews
Family-OwnedLicensed since 2010
24-Hour ResponseFree in-home estimate
Pasadena PermitsHPOZ aware · in-house
Why Hillstar
Why Pasadena Homeowners Choose Hillstar
Pasadena pairs some of the region's best ADU lots with some of its most careful review. Both deserve respect.
Pasadena's Permit Path
The city's Building & Safety Division reviews and inspects — LADBS and LA's plan programs don't reach here. Our drawings target Pasadena's code from the start.
Rear-Garage Goldmine
Early-1900s through mid-century lots often carry generous detached garages at the rear — prime conversion candidates inside their own footprint.
Landmark-District Careful
Bungalow Heaven, Madison Heights, Garfield Heights and their peers add design review on exterior work. We prepare those materials as part of the package.
Old-Infrastructure Honesty
Knob-and-tube survivals, small panels, and original drains appear during Pasadena demos more than anywhere in the Valley. We price them at design.
Foothill & Oak Provisions
The Hillside Development District and the city's oak ordinance shape foothill envelopes; both are handled at the drawing stage.
Single-Team Delivery
Feasibility through final inspection, one contract, one crew.
Our process
Building an ADU in Pasadena
Four stages matched to the city's review culture.
1
Property & District Check
Lot geometry, garage condition, landmark-district status, trees, and utilities verified first.
2
Design & City Submittal
Plans drawn for Pasadena's path — with design-review materials where the district requires them.
3
Construct
Our crew builds it; the city's inspections are scheduled and met by us.
4
Close Out
Final sign-off, walkthrough, and the written workmanship warranty.
Local conditions
Permits, Lots & What's Specific to Pasadena
Pasadena is its own city, with its own permit office and its own historic-preservation framework. State ADU law applies — but the local permit path, the landmark-district overlay, and the older housing stock combine to make Pasadena ADU work look meaningfully different from anything in the City of Los Angeles.
Permit jurisdiction
City of Pasadena Planning & Community Development — Building & Safety Division — issues every Pasadena ADU permit. LADBS does not. The LA City Standard ADU Plan Program is not accepted; designs are drawn for the Pasadena code path. Plan check, electrical, plumbing, and final inspection schedule directly with the city.
Lot & property patterns
Pasadena's housing stock skews early-1900s through mid-century, and many lots come with a generous existing detached garage at the rear — which makes the garage-conversion ADU path unusually clean here. Older infrastructure (knob-and-tube survivals, undersized panels, original cast-iron drains) shows up during demolition more often than in the post-war Valley; we price the contingency at quote.
Design overlays you'll see here
Pasadena's Landmark District designations — Bungalow Heaven, Madison Heights, Garfield Heights, Prospect Park, and others — apply additional design review on top of the standard plan check; exterior changes go through the city's design-review process. The Hillside Development District covers foothill parcels with grading and height rules. Pasadena's Oak Tree Ordinance protects oaks beyond LA's, and parts of the foothills sit inside California Fire Hazard Severity Zones, where Chapter 7A WUI compliance applies.
Design examples
ADU Design Examples
Examples of ADU styles and layouts.
Reviews
Homeowners on Working With Hillstar
Verified Houzz reviews from Hillstar Construction clients.
“Lior is a fantastic general contractor. He has tremendous work ethic and strong attention to detail.”
J. GlaserHouzz · June 2017
“Hillstar's crew was courteous, prompt, and worked hard to make every detail exactly what we wanted.”
Hillstar ClientHouzz · Verified
5.0 · 17 verified reviews on Houzz
FAQ
Pasadena ADU — FAQ
City permits, landmark districts, garage conversions, old-house systems, and honest budgets.
Who reviews ADU plans in Pasadena?
The City of Pasadena — Planning & Community Development's Building & Safety Division. It's a separate jurisdiction from Los Angeles with its own submittal standards, and the LA Standard Plan Program isn't accepted. State ADU law applies in full; the road runs through the city's own desk.
We're in Bungalow Heaven. Can we still add an ADU?
Yes — landmark-district status doesn't remove the ADU right. It adds design review on exterior work, so the unit's massing, materials, and street visibility get evaluated against the district's character. We design for that review from the first sketch and prepare the submission materials ourselves.
Why are garage conversions so common here?
Because Pasadena's older lots were built with real rear garages — often oversized by modern standards — and a conversion inside the existing footprint skips most setback rules while preserving the garden. Structural condition and ceiling height are the go/no-go checks, made at feasibility.
What old-house surprises should the budget expect?
The classics of pre-war construction: knob-and-tube remnants, panels at 60 or 100 amps, galvanized service, cast-iron drains. An ADU adds load to all of it, so our design phase tests these systems and the quote carries their upgrades as visible line items — before demolition, not after.
Do the foothills change anything?
North toward the mountains, parcels can fall in the Hillside Development District — grading and height provisions — and Pasadena's oak ordinance protects trees beyond LA's standard. Where either applies to your lot, it's engineered into the design rather than discovered at plan check.
Also serving Pasadena
Nearby ADU neighborhoods
Explore an ADU on Your Pasadena Lot
Free feasibility visit — district status, garage assessment, utilities, and a written plan.