Home Addition Contractor in Westlake Village - Design, Permits and Build Under One Contract

Fast, Reliable Home Addition Contractor Across Westlake Village

A home addition in Westlake Village runs $180,000 to $450,000 for most projects, with bathroom additions starting around $65,000 and bedroom additions typically landing between $95,000 and $160,000. The bigger variable here isn’t square footage – it’s what the HOA Architectural Review Committee will approve and what the walls reveal once they’re open. As a Home Addition Contractor serving Westlake Village, Lodgewick ADU Builders handles both tracks: the City of Westlake Village permit and the ARC sign-off that governs massing, roof pitch, and exterior materials. If you’re planning an addition and want a written price before anyone swings a hammer, call (254) 602-5618.

Call (254) 602-5618

Westlake Village is different from Thousand Oaks or Agoura Hills in one way that matters more than any other: nearly every neighborhood sits under an HOA with an Architectural Review Committee that holds real authority over what you can build. We’ve learned to submit renderings to the ARC before pulling the city permit, because in this city, the committee’s aesthetic standards effectively override what the setback math alone would allow. A homeowner who skips that step can watch a perfectly good permit application turn into a mandatory redesign.

Why Lodgewick ADU Builders Is Westlake Village’s Preferred Home Addition Contractor Company

Our Home Addition Contractor team has spent years working through the two-track approval process that defines Westlake Village construction. We know the First Neighborhood’s post-and-beam ranches, the lakefront enclaves around Westlake Lake, and the two-story traditionals off Lindero Canyon Road. That local knowledge shows up in the written price: when we quote a job, we’re quoting what actually happens on this city’s lots, not a generic Southern California number.

Westlake Village homeowners repeatedly tell us the same thing: they’ve been burned by a price that changed at the door or a crew that never showed. That’s why every Lodgewick project operates under The Kingswell Guarantee. A written price before work begins. A defined arrival window. A clean job site. And a written guarantee on every build – if something isn’t right within 365 days, we come back and make it right, free. Russ Delmar leads our crew, and he’s the one who signs off on that guarantee before we frame a single wall.

We also answer the phone. A live person, 24 hours a day, seven days a week. Not a voicemail loop, not a chatbot. When you’re mid-permit with the city and the ARC and you have a question about your addition, you’ll actually reach someone who can answer it.

Bathroom Addition Contractor in Westlake Village

A Bathroom Addition Contractor in Westlake Village typically handles primary-suite expansions, guest baths off family rooms, and full second-story bathroom additions on the city’s two-story traditionals. Most bathroom additions here run $65,000 to $110,000 depending on whether the job is a straightforward extension off existing plumbing or a new wet wall that requires re-routing drain lines through post-and-beam framing. Homes built between the late 1960s and mid-1980s often have cast-iron drain pipes that have to be replaced once the slab or floor is opened, and that discovery re-prices the plumbing scope before any tile goes up.

What drives cost in older Westlake Village homes

The age of the house. Most Westlake Village bathrooms sit in homes where the original plumbing is 40 to 55 years old. When we open a wall to tie in a new bathroom, we regularly find galvanized supply lines or cast-iron drains that won’t pass current code. We write allowances into the contract for exactly this – and any change gets priced and approved in writing before we touch it. No surprises at the door, ever.

Primary suite additions that pass the ARC

Adding a bathroom as part of a primary suite means the ARC will look at window placement, exterior finish, and how the new roofline reads from the street. We submit those renderings early, before the city sees the permit application. It saves months. It also saves the redesign cost that hits homeowners who pull the city permit first and find out later the committee won’t approve the massing.

Bedroom Addition Contractor in Westlake Village

A Bedroom Addition Contractor in Westlake Village handles exactly what the city’s housing stock demands: converting an attached garage into a legal bedroom, pushing out a ground-floor wall for a guest room, or adding a second-story bedroom suite to a ranch. Bedroom additions here run $95,000 to $160,000 for a ground-level build-out, while second-story work starts around $180,000 because the structural load path has to be re-engineered through the existing walls and foundation. Many of the city’s original homes were built on slab foundations with post-and-beam framing, which complicates interior wall placement more than a typical stick-built tract house.

Garage conversions with a panel upgrade

Westlake Village’s attached two- and three-car garages are the most common starting point for a bedroom addition. But the original 100-amp electrical panel – standard on homes built in the 1970s – almost always has to be upgraded to 200-amp service to support the new living space. That’s a $3,500 to $6,000 line item that belongs in the written quote from day one, not as a “discovery” after demolition starts.

Second-story additions and fire-zone requirements

Many Westlake Village parcels sit within or adjacent to a High Fire Hazard Severity Zone. When a bedroom addition creates new exterior wall area, the city’s permit triggers Chapter 7A ignition-resistant construction: specific exterior wall assemblies, ember-resistant vent covers, and Class A roofing. We factor those costs into the written price before the job starts, because a contractor who quotes without them is quoting a number that won’t survive first plan review.

Trusted Brands We Service in Westlake Village

We work with established prefab and panelized manufacturers that make sense for Westlake Village lots and fire-zone requirements: Cover, Dvele, and Boxabl. Each has strengths for particular sites – Dvele’s panelized envelope handles the Chapter 7A ignition-resistant calcs cleanly, Cover’s design process produces the ARC-ready renderings some of the lakefront committees demand, and Boxabl works well for compact accessory units where the HOA insists on a smaller footprint. For homeowners who need speed and predictability, we can source prefab components without the design drift that custom framing invites. We match the system to your lot, your budget, and what the ARC will actually approve.

Common Home Addition Contractor Problems We See in Westlake Village Homes

• Post-and-beam framing that relocates interior walls. The late-1960s and 1970s ranches in the First Neighborhood and around Westlake Lake often use post-and-beam construction, not conventional stud walls. A bedroom addition that assumes a simple stud partition can hit a structural beam and trigger a redesign that moves the wall, shifts the door, and re-prices the structural scope.
• 100-amp electrical service that won’t carry the new load. Most original Westlake Village homes have 100-amp panels. Add a bedroom with a mini-split, a bathroom with a heated floor, or a kitchenette, and the panel is done. The upgrade to 200-amp service should be in the written quote before work starts, not discovered mid-project.
• ARC denial on massing or roof pitch after the city permit is pulled. This is the most expensive mistake we see in Westlake Village. A homeowner pulls a City of Westlake Village building permit, starts talking to a contractor, and only later submits to the Architectural Review Committee. The ARC then demands changes to the roofline or the street-facing elevation that invalidate the original permit drawings and add weeks or months of redesign cost.
• Water intrusion at the existing roofline tie-in. Westlake Village’s winters bring sustained rain, and the seam where a new addition’s roof meets an original 50-year-old roofline is the first place water finds a path in. We detail the flashing and drainage at that tie-in before we frame it, and we put the waterproofing spec in the written contract.

Pricing for Home Addition Contractor in Westlake Village, CA

We Also Serve Cities Near Westlake Village

Our crews serve Westlake Village and the surrounding Conejo Valley communities, including Thousand Oaks, Agoura Hills, Oak Park, and Newbury Park. If you’re in a neighboring city and planning a home addition, the same Kingswell Guarantee applies: written price first, real arrival window, clean job site, written guarantee. Dispatch and scheduling are coordinated from the brand’s Los Angeles office, and crews work locally in each service area.

FAQs About Home Addition Contractor in Westlake Village