Fast, Reliable Home Addition Contractor Across Calabasas
Planning a home addition in Calabasas means working with two approvals most homeowners never see coming: the city permit and the HOA architectural review. We’ve built enough additions here to know both processes inside out. A typical Calabasas room addition runs $285 – $425 per square foot, and a second-story addition runs $350 – $550 per square foot depending on Chapter 7A fire-hardening requirements and what we find when walls open. Call (254) 602-5618 for a written estimate before any work starts. Our crews know the 1980s tract homes on Park Granada, the gated lanes of The Oaks, and the ridge-line lots above Mulholland Highway. You won’t have to explain your neighborhood to us.
Why Lodgewick ADU Builders Is Calabasas’s Preferred Home Addition Contractor Company
Russ Delmar has built the Lodgewick name in Calabasas on one habit: putting every commitment in writing before a single nail is driven. That’s The Kingswell Way. Written price first, a defined arrival window, a clean job site, and a written guarantee on every project. If something isn’t right, our 365-Day Done Right Promise brings us back within the guarantee period on our dime. No phone tag, no “let me get back to you.” A live person answers our phones 24 hours a day.
Calabasas homeowners call us because we understand what their homes actually are: luxury tract houses from the 1980s and 1990s, built fast, sitting in fire zones, wrapped in HOA rules. We know what’s behind those stucco walls before we open them. That’s why our pricing for Calabasas additions includes written allowances for aluminum wiring, waterproofing failures, and Chapter 7A upgrades. We’ve seen it all on Park Sorrento, on Mulholland, and everywhere between. Our Home Addition Contractor team handles the full scope from framing to finish on every project.
Room Addition Contractor in Calabasas
A Room Addition Contractor in Calabasas does more than pour a slab and frame walls. California Building Code Chapter 7A applies to every new structure in this city’s Very High Fire Hazard Severity Zone, which means one-hour fire-rated exterior wall assemblies, ember-resistant vents, and Class A roofing are non-negotiable on even a simple bump-out. A ground-floor room addition in Calabasas typically runs $285 – $425 per square foot. That range accounts for fire-rated materials, HOA-compatible finishes like matching stucco color and tile roof profile, and the surprises hiding in 1980s framing.
Structural and Code Requirements
Calabasas sits against the Santa Monica Mountains where clay-rich soils shift with winter rain. We include a soils report and proper shear wall design in every scope. Skip that step and a five-year-old addition can start separating at the seam.
Working With Your Existing Footprint
Expanding your living room or adding a bedroom off the back of a 1992 Parkway Calabasas house means matching rooflines, eaves, and wall planes. The HOA will check. We photograph the existing facade, spec matching materials, and submit architectural drawings the review board can approve on the first pass.
Second Story Addition Contractor in Calabasas
A Second Story Addition Contractor in Calabasas has to solve two problems at once: supporting a new floor on walls never designed for the load, and meeting Chapter 7A fire code on every new vertical surface. Second-story additions in Calabasas run $350 – $550 per square foot. You’re paying for engineering, fire-hardened exterior assemblies, and often a temporary relocation because the roof comes off. The result is real square footage without giving up the yard your HOA landscape rules already govern.
Engineering and Load Path
Going up means your existing footings and first-floor framing carry more than they ever have. We bring in a structural engineer early to size beams, check the foundation, and design the load path. On a 1987 home in Calabasas Park, undersized headers are common. You don’t want a second story resting on one.
HOA Design Review for Vertical Additions
In gated communities like The Oaks of Calabasas, a second-story addition changes the home’s roofline and massing, which triggers closer architectural committee scrutiny. They review roofline, window placement, stucco color, and exterior fixtures. We prepare elevation drawings to their standard. That review board meets monthly, so starting the design review early keeps your project on schedule. If you’re weighing whether an addition or a detached ADU makes more sense for your lot, our advisors can walk through both options with real numbers for Calabasas. Many homeowners find a Home Addition Contractor in Calabasas who also builds ADUs is the most practical way to compare them side by side.
Trusted Brands We Service in Calabasas
Calabasas additions increasingly use panelized and prefabricated building systems to cut framing time on constrained lots and inside gated communities with strict working-hour rules. We build with components from Abodu, Cover, and Dvele. Each brand has different fire-rating documentation, which matters in Calabasas. Abodu’s steel-framed panels speed up second-story work. Dvele’s integrated assemblies help meet Chapter 7A without layered trade work. We spec the right system for your lot, your HOA’s finish requirements, and your project’s engineering needs. Using the same materials across framing, windows, and roofing means fewer supply delays even when a Santa Ana wind event shuts down canyon roads.
Common Home Addition Contractor Problems We See in Calabasas Homes
- Aluminum branch wiring in 1980s tract homes. Opening a wall on a Park Granada house from 1986 often reveals aluminum wiring that current code won’t allow to remain unprotected. If your contract doesn’t pre-allowance this, you eat the cost mid-project. We write a wiring-upgrade allowance into every Calabasas addition contract.
- Failed waterproofing at wet walls. Bathroom and kitchen additions routinely expose rotted sill plates and deteriorating moisture barriers where original builder-grade waterproofing failed. Full membrane replacement can add two to three weeks and several thousand dollars. We spot the signs during our pre-construction inspection and price it before we start.
- HOA architectural review timeline. The city of Calabasas can issue your permit in weeks under state ADU and addition mandates. The HOA architectural committee in The Oaks doesn’t work on the same clock. If they send back your stucco color or roof tile choice, ground-breaking moves by three to six months.
- Chapter 7A fire-hardening on every new surface. The Woolsey Fire didn’t just pass through Calabasas; it rewrote the building code here. Ember-resistant vents, dual-pane windows, and one-hour exterior wall assemblies are not optional upgrades. They’re required. An honest Calabasas estimate includes them on day one, not as a change order.
Pricing for Home Addition Contractor in Calabasas, CA
Here’s what we tell Calabasas homeowners in the first conversation. A single-story room addition runs $285 – $425 per square foot. A second-story addition runs $350 – $550 per square foot. Sunroom additions land between $220 – $350 per square foot depending on glazing and Chapter 7A glazing requirements. Bathroom additions run $300 – $450 per square foot because of plumbing, waterproofing, and finishes. Garage additions converting existing space to living area run $180 – $300 per square foot, but HOA requirements to preserve the original facade with faux garage doors can push that higher. Every one of those ranges includes the fire-rated wall assemblies and ember-resistant vents Calabasas requires. Written allowances for hidden conditions are built into the contract. Call (254) 602-5618 and we’ll give you a written price before you commit to anything.
We Also Serve Cities Near Calabasas
Our crews work throughout the Calabasas area, including Woodland Hills, West Hills, Topanga, and Canoga Park. Each city has its own HOA patterns, fire-zone maps, and housing stock quirks. We know them all. If you’re a homeowner in one of those nearby communities, we bring the same written pricing and 365-Day Done Right Promise to your project.
Serving Calabasas, CA - Our Local Coverage Area
We’re based in the Calabasas area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About Home Addition Contractor in Calabasas
Calabasas additions cost more because the city’s Very High Fire Hazard Severity Zone designation requires Chapter 7A ignition-resistant construction: one-hour fire-rated exterior wall assemblies, ember-resistant vents, Class A roofing, and dual-pane windows on every new structure. Those materials add $20 – $45 per square foot compared to flatland Valley cities where a standard stucco wall passes. On top of that, HOA architectural requirements in gated communities like The Oaks often mandate matching roof tile profiles and specific stucco finishes that cost more than builder-grade options. For an exact number on your lot and scope, call (254) 602-5618 and we’ll walk the property and write the estimate.
It depends on what we find inside the wall, but in many Calabasas tract homes built between 1983 and 1991 the answer is yes. That era frequently used aluminum branch wiring. When those aluminum runs are exposed during a room addition, current electrical code requires they be pigtailed with approved connectors or replaced with copper. We write a wiring-upgrade allowance into every Calabasas addition contract so the cost is approved before we ever touch the wall. It’s not a surprise, and it’s not a change order. If the wiring is clean copper, you don’t pay the allowance. Call (254) 602-5618 for a pre-construction inspection and we’ll tell you what your home has.
We treat the HOA review as a separate schedule track that runs parallel to the city permit. We prepare complete architectural drawings with elevation views, material specifications, color samples, and roof tile profiles before the first committee meeting. Then we submit. If the committee requests changes to stucco color or roofline, we revise and resubmit. The committee in communities like The Oaks typically meets once a month, so a revision can add thirty days. That’s why our Calabasas schedules always include HOA review time as a line item, not an afterthought. You’ll see it in writing in the contract. Then we keep the city permit moving so both approvals land as close together as possible.
A second-story addition requires structural engineering for the load path through your existing first-floor framing and foundation, which single-story additions on a slab don’t need. You’re also adding more vertical surface area, which means more Chapter 7A fire-rated wall assembly, more ember-resistant venting, and more Class A roofing material. HOA review gets more involved too, since the roofline and massing of the home change. Expect engineering reports, foundation verification, and often a temporary relocation since the roof comes off. We build all of that into the written price. Call (254) 602-5618 with your street address and we’ll tell you what a second story looks like on your specific house.
You approve it in writing before we fix it, and we price it against the allowance built into your original contract. Failed waterproofing at wet walls is one of the most common discoveries in Calabasas homes from the 1980s and 1990s. When we find it, we stop, document it with photos, give you a written scope and price, and get your approval before any repair work begins. If the repair falls within the written allowance you already approved, work continues without delay. That allowance is part of every Calabasas addition contract we write. You’re never handed an unapproved invoice at the end of the job. Call (254) 602-5618 before you break ground, and we’ll show you exactly how the allowance works in writing.
Written by Russ Delmar, Owner at Lodgewick ADU Builders, serving Calabasas as part of the Kingswell family of home-service companies since 2010.