ADU & Guest House Construction Built Around Real Life
Accessory Dwelling Units — ADUs — have become one of the smartest investments a homeowner in Ventura County can make. Whether you're creating space for aging parents, building a rental unit for extra income, or giving your adult kids a place of their own without leaving the property, an ADU adds real value to your home and your life.
At Nicodemus Construction, we help homeowners navigate the full ADU process — from understanding what's allowed on your lot to handing you the keys to a fully finished, move-in-ready space. We've built attached ADUs, detached guest houses, and garage conversions across Oxnard, Ventura, Camarillo, and beyond. Every one of them was designed around the specific needs of the people who would use it.
Why ADUs Are Booming in Ventura County
California has made it easier than ever to build an ADU. Recent state legislation has streamlined permitting, reduced fees, and removed many of the barriers that used to make these projects difficult to get off the ground. In Ventura County specifically, cities like Oxnard, Camarillo, and the City of Ventura have updated their zoning codes to allow ADUs on most residential lots — even those that were previously restricted.
The result? More homeowners are building ADUs than ever before. And for good reason:
- Multi-generational living: Keep family close without sacrificing anyone's privacy
- Rental income: A well-built ADU in Ventura County can generate $1,500–$3,000+ per month
- Property value: An ADU typically adds significant equity to your home
- Flexible space: Home office, art studio, guest suite — your ADU can serve whatever purpose you need
Our ADU Construction Process
Building an ADU involves more moving parts than most homeowners expect. Permitting alone can be confusing — setback requirements, lot coverage limits, utility connections, fire access, and parking rules all come into play. That's why having an experienced builder matters. We handle the complexity so you don't have to.
1. Feasibility & Site Assessment
We start by visiting your property to assess what's possible. We'll look at lot size, setbacks, utility access, soil conditions, and zoning requirements specific to your city. Not every lot works for every type of ADU, and we'll be upfront about what makes sense for yours.
2. Design & Planning
Whether you want a 400-square-foot studio or an 1,100-square-foot two-bedroom unit, we'll help you design a layout that maximizes every inch. We work with architects and designers to create plans that feel like a real home — not an afterthought. Full kitchens, proper bathrooms, natural light, and smart storage are standard for our builds.
3. Permitting
We manage the entire permit process. We know the local building departments in Oxnard, Ventura, Camarillo, and Santa Barbara — the forms, the timelines, the plan check reviewers, and the common hang-ups. Our experience typically means faster approvals and fewer surprises.
4. Construction
From foundation to finish, our crews build to the same standard we hold for our custom homes. That means proper insulation, quality framing, durable finishes, and attention to detail on every surface. We keep the job site clean and communicate with you throughout the process so there are no mysteries about timeline or progress.
5. Final Inspection & Handoff
We coordinate all final inspections, ensure everything is to code, and walk you through the finished space before we hand it over. You'll move in — or move your tenant in — with complete confidence.
Types of ADUs We Build
- Detached ADUs: Standalone units in your backyard — maximum privacy and flexibility
- Attached ADUs: Built onto or into your existing home — often more cost-effective
- Garage conversions: Transform an underused garage into livable space without new construction footprint
- Junior ADUs (JADUs): Smaller units (up to 500 sq ft) carved from existing living space
- Two-story ADUs: Where zoning allows, we can build up to maximize square footage on smaller lots
What Our Clients Often Ask
How much does an ADU cost in Ventura County?
Costs vary depending on size, site conditions, and finishes, but most ADUs in Ventura County range from $150,000 to $350,000 for a fully permitted, move-in-ready unit. Garage conversions tend to be on the lower end. We provide detailed estimates before any work begins.
How long does it take to build an ADU?
The permitting process typically takes 4–8 weeks. Construction ranges from 3–6 months depending on scope. Total timeline from design to move-in is usually 6–10 months.
Do I need to live on the property?
California's current ADU laws have removed the owner-occupancy requirement for most ADU types, meaning you can rent both the primary home and the ADU. However, JADUs do still require owner occupancy. We'll help you understand the specific rules for your lot.
Let's Talk About Your ADU Project
Whether you've been thinking about an ADU for years or just started exploring the idea, we'd love to help you figure out what's possible. We'll assess your property, walk you through the options, and give you an honest estimate — no pressure, no sales pitch. Just clear, straightforward advice from a builder who's done this before.