ADU in Pasadena - One Fixed Price, Permits Handled
We handle the design, the engineering, and the city permit, then build it. One contract, one crew, one accountable point of contact. Free feasibility check on your lot before you commit.
Call to schedule your free estimate
Our ADU Services
From garage conversions and junior ADUs to brand-new detached cottages, we offer every service needed to plan, permit, and build your accessory dwelling unit with confidence.
ADU Design & Permitting
Professional adu design & permitting service. Licensed & insured with a satisfaction guarantee on every job.
ExploreGarage Conversion ADU
Professional garage conversion adu service. Licensed & insured with a satisfaction guarantee on every job.
ExploreNew Detached ADU
Professional new detached adu service. Licensed & insured with a satisfaction guarantee on every job.
ExploreJunior ADU & Interior Conversion
Professional junior adu & interior conversion service. Licensed & insured with a satisfaction guarantee on every job.
ExploreADU Site Prep & Utilities
Professional adu site prep & utilities service. Licensed & insured with a satisfaction guarantee on every job.
ExploreOur Work in Pasadena
A look at recent adu projects across Pasadena and surrounding areas.
ADUs Built the Way Your Home Deserves
Every ADU we build in Pasadena is treated like a custom home, not a production box. We select materials thoughtfully, frame with precision, and finish every surface with the same attention we'd give our own families' homes. That commitment to craft is what separates a beautiful, lasting ADU from one that feels like an afterthought.
Our team includes experienced designers, project managers, and tradespeople who take genuine pride in their work. When we hand you the keys, we want you to feel the difference - in the solid click of the door, the clean lines of the millwork, and the confidence that everything behind the walls was done right.
Explore Our Craftsmanship
A Partner You Can Count On From Day One
We know building an ADU is a significant investment, and we treat it that way. That means honest timelines, clear contracts, and a project manager who picks up the phone. We don't disappear after the contract is signed - we stay in close communication through every permit, every inspection, and every finish decision.
Pasadena homeowners choose us because they feel heard. We explain every step in plain language, surface challenges before they become surprises, and never pressure you into upgrades you don't need. Your trust is the foundation every great ADU is built on.
Meet the Team
What Homeowners Say
Projects across Pasadena and surrounding communities.
"The permit set and the build were one contract with one number. Our neighbours used two firms and spent a year watching them blame each other."
"They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
"Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
Your ADU, Built Right - Step by Step
We've refined every phase of the ADU journey so you always know what's happening next and your project stays on time.
Free Discovery Call
We start with a relaxed, no-pressure conversation to understand your goals, your lot, and your budget - so we can recommend the right ADU path for your Pasadena home.
Site Evaluation
Our team visits your property to assess setbacks, utilities, soil conditions, and zoning requirements, giving you a clear picture of what's buildable before you commit.
Custom ADU Design
Our in-house designers draft architectural plans tailored to your lifestyle and Pasadena's design guidelines, blending seamlessly with your existing home's character.
Permit Submission & Approval
We prepare and submit a complete permit package to the City of Pasadena, managing all back-and-forth with the building department so approvals happen as quickly as possible.
Site Prep & Utilities
Before a single framing nail goes in, we coordinate grading, trenching, and utility connections - water, sewer, gas, and electrical - so your build starts on solid ground.
Construction & Framing
Our skilled craftsmen bring your plans to life with quality materials and precise workmanship, keeping the job site clean, safe, and on schedule throughout the build.
Inspections & Quality Checks
We schedule and pass every city inspection milestone, conducting our own internal quality walkthroughs to catch and correct any detail before it becomes a problem.
Final Walkthrough & Handoff
We tour the finished ADU with you, explain all systems and warranties, and hand over a complete documentation package - so you're move-in ready with total peace of mind.
Quality You Can See in Every Corner
These are the six dimensions we refuse to compromise on, because your ADU should perform as beautifully as it looks.
Code-Compliant Craftsmanship
Every structural, electrical, and plumbing element meets or exceeds California building code, protecting your investment and keeping your family safe for decades.
Design Cohesion
We design ADUs that feel intentional alongside your main home, matching materials, rooflines, and finishes so your property looks curated, not cobbled together.
Permit-Ready Documentation
Our permit packages are thorough and accurate the first time, reducing city revision cycles and getting your project moving faster than the industry average.
Utility Integration
We engineer proper water, sewer, and electrical connections from the start, preventing the costly retrofit headaches that plague ADUs built without foresight.
Durable Material Selection
We source materials built for Southern California's climate - specifying finishes, insulation, and systems that hold up to Pasadena's heat, sun, and occasional freezes.
Transparent Project Management
You receive regular progress updates, clear timelines, and a single point of contact throughout your build, so you're never left wondering what's happening with your project.
Why Pasadena Builds With Us
Here's what makes our Pasadena ADU team the partner homeowners recommend to their neighbors.
Fast, Reliable Permitting
We know Pasadena's building department inside and out. Our permit packages are thorough and accurate, which means fewer revision cycles, faster approvals, and a project that starts on time.
True Design-Build Expertise
Architecture, engineering, and construction under one roof means fewer handoff errors, tighter coordination, and a final product that looks exactly like what you approved in the design phase.
Honest, Responsive Communication
You'll have a dedicated project manager who gives you straight answers, regular updates, and a clear picture of where your project stands - every single week.
Guaranteed Workmanship
We stand behind every ADU we build with a workmanship warranty, because we believe confidence in your investment shouldn't stop the moment we hand over the keys.
Frequently Asked Questions
Honest answers to the questions Pasadena homeowners ask us most before starting their ADU journey.
Ready to Build Your Pasadena ADU?
Let's turn your property's potential into a beautiful, income-generating, family-expanding space - starting with a free, no-pressure consultation from our local ADU team.
(626) 427-9813Get Your Free ADU Consultation
Tell us a little about your property and goals, and we'll reach out quickly to schedule your free site evaluation and design conversation.
ADU Service Across the Pasadena Area
We Are the Pasadena Team for Ellery.
Ellery was founded in 2015, the year California's ADU law changed and the permitting queue became the actual product. It is a design-build studio rather than a contractor: the drawings, the permit set and the build are one contract with one price, because the ADU projects that go wrong are almost always the ones where the designer and the builder can each blame the other.
Same training, same parts, same pricing practice, and the same 365-Day Done Right Promise - delivered by people who live here.
Visit Ellery →Part of the Haven Family.
Haven is a family of home-service brands held to one written standard, and Ellery is the adu company in it. One promise stands behind every trade, in every town.