Randal G. Winter Construction, Inc.
    (661) 799-8089Free Site Visit
    Additions & Remodels in Altadena
    Additions & Remodels in Altadena, Los Angeles County (unincorporated)

    More Space in Altadena. Without the Stress of Moving.

    We design and build room additions across Altadena and Los Angeles County (unincorporated), managing every step from permits to final inspection. One contractor, one process, zero chaos.

    44+
    Years in Business
    500+
    Projects Completed
    100%
    Licensed & Insured

    Free Site Visit

    We'll respond within 1 business day.

    Your information is private and will only be used to reach out about your project.

    44+ Years Experience
    Family-Owned & Operated
    Licensed, Bonded & Insured
    ICC Certified
    Full-Service Design-Build
    Free Consultation
    Additions & Remodels in Altadena, Los Angeles County (unincorporated)

    We Build in Altadena. We Know Altadena.

    We know Altadena block by block. From West Altadena, East Altadena, Meadows, Country Club area, Janes Village, and everywhere in between, we've worked on homes across Los Angeles County (unincorporated) for over 44+ years. Altadena is unincorporated LA County, and that one fact changes the entire permit process. Fire rebuilds here run through LA County Building & Safety and the Altadena One-Stop Center, not a city hall. We know the track, the fire-hardening code, and the like-for-like path back home.

    Permitting in Altadena has its own personality, and it directly affects your additions & remodels project. CRITICAL: Altadena is UNINCORPORATED Los Angeles County, not a city. All building permits are issued by the LA County Department of Public Works Building & Safety (not LADBS, not Pasadena), and land-use approvals come from LA County Regional Planning. Fire rebuilds route through the Altadena One-Stop Permit Center and the EPIC-LA portal. Non-like-for-like rebuilds are subject to the Altadena Community Standards District (CSD). The January 2025 Eaton Fire destroyed or damaged over 6,000 structures in Altadena, and rebuilding is ongoing and complex. Altadena sits in a Wildland-Urban Interface (WUI) zone, triggering Chapter 7A fire-hardening requirements. Like-for-like rebuilds are the fastest path and can modify up to 10% or 200 sq ft; larger redesigns face longer timelines under current zoning. Many upper-Altadena lots are on septic or private water utilities. A 44-year licensed GC who understands the LA County (not city) permit track is exactly what this rebuild market needs. Our ICC-certified team handles every layer of the approval process so your additions & remodels moves forward without surprises.

    When you hire us for your additions & remodels in Altadena, you're getting a contractor who understands the difference between a Craftsman or mid-century home and a tract build. We spec materials and methods that fit the home and the neighborhood, not a one-size-fits-all approach.

    Neighborhoods We Serve in Altadena

    West AltadenaEast AltadenaMeadowsCountry Club areaJanes VillageUpper Altadena / foothills
    Why Homeowners in Altadena Choose Us

    One Team. One Process. Zero Chaos.

    Room additions in Altadena go wrong when too many contractors are involved. We handle everything in-house: design, permitting, demolition, trade work, and finish. You have one point of contact from start to final walkthrough.

    1. Design-Build Under One Roof

    No coordinating between separate architects, engineers, and contractors. We handle design, planning, permitting, and construction for your Altadena addition, fully integrated from the first meeting.

    2. Clear Timelines, Honored Commitments

    Written agreements include start and completion expectations. We set realistic schedules and we stick to them, because your time matters.

    3. Skilled Specialists, Not Generalists

    Our team includes trade specialists in framing, foundation, roofing, plumbing, electrical, and finish carpentry. Every element of your addition handled by someone who does it every day.

    4. Quality You Can See and Feel

    We don't cut corners. Randy has trained tradespeople and written on what good construction looks like, and that standard is built into every addition we take on in Altadena.

    Additions & Remodels in Altadena
    44+
    Years of Craftsmanship
    How It Works

    Clear Steps. No Surprises.

    We've built hundreds of additions across Los Angeles County (unincorporated) over four decades. Here's how we run every single one, including yours in Altadena.

    01

    Free Site Visit

    We come to your home, walk the property, understand your goals, and give you honest feedback on what's feasible, at no cost.

    02

    Design & Estimate

    We develop a detailed scope, plans, and written estimate. No ballpark figures, you see the real numbers before anything begins.

    03

    Permits Pulled

    We handle all permit applications and approvals. Construction doesn't start until everything is properly permitted.

    04

    Build & Inspect

    Construction begins with your project manager on-site throughout. All inspections are scheduled and passed before we move to finish work.

    Our Work

    Additions We've Built Across Los Angeles County (unincorporated)

    Every addition in our portfolio was designed to blend seamlessly with the original home. Here's a look at some of our completed addition projects, including work in and around Altadena.

    Custom home and remodel project
    Home addition and remodel detail
    Custom home interior
    Request Free Estimate
    What Our Clients Say

    Real Projects. Real Homeowners.

    Common Questions

    Answers Before You Ask

    Get Started Today

    Request Your Free Site Visit in Altadena

    We'll come to your home in Altadena, walk the property, and give you an honest assessment of what's possible, at no cost and no obligation. Most homeowners leave the first visit with a clear picture of timeline, scope, and budget range.

    Call or text: (661) 799-8089
    Email: info@rgwinter.com
    Monday - Friday: 8:00 am - 4:30 pm; Sat/Sun Closed
    Nearest office: Corporate (28348 Constellation Road, Unit 810, Santa Clarita, CA 91355)

    Free Site Visit

    We'll respond within 1 business day.

    Your information is private and will only be used to reach out about your project.