Avoid $30k-$60k ADU Mistakes Before Construction Starts
Real case studies show how poor planning destroys budgets and timelines.
What Is ADU Planner Pro?
ADU Planner Pro is a strategic consulting service that helps homeowners and investors plan their ADU correctly before design and construction begin. Through one structured session, we identify risks, clarify budgets, validate feasibility, and create a smarter path forward.
✔ Feasibility Review
✔ Risk Analysis
✔ Budget Strategy
✔ ROI Planning
✔ Contractor Guidance
Missing Footings in Garage Conversion – City of Anaheim
Case Study
An investor planned to convert an 816 sqft unpermitted garage into a legal detached ADU in the City of Anaheim. The city approved the plans, assuming the existing slab contained structural footings. Before construction began, a recommendation was made to open the slab in one or two locations to verify the footings. The contractor that won the bid did not perform the verification. Once demolition began, it was discovered that the slab had no structural footings. The project failed inspection, a structural change order was issued, the contractor refused to proceed under the original contract price, legal discussions followed, and construction stopped for eight months.
Engineer structural revision: $1,500
Demolition of slab: $4,000
Excavation, forms, and new footings: $15,000
Subtotal structural correction: $20,500
Construction delay: 8 months
Estimated lost rental income ($3,000/month): $24,000
Estimated lawyer fees: $8,000 – $15,000
Total financial impact: $52,500 – $59,500+
Professional ADU strategy fee: $2,000
Cost to open slab and verify footing: $2,000
Total prevention cost: $4,000
This example illustrates only one structural risk within an ADU project. During permitting, structural design, utility coordination, and construction, multiple additional risk points can generate significant cost overruns if not identified early.
Rafael Pozas - ADU Strategy Consultant
Developer | General Contractor
Rafael Pozas is a California-based ADU strategist, developer, and licensed general contractor with over 25 years of experience in construction and real estate development across the United States and Brazil. He holds a Master’s Degree in International Business, bringing a strong financial, strategic, and global perspective to ADU planning and development.
As founder of Plus Home Construction, Rafael specializes in helping homeowners and investors plan, design, and build ADUs with a focus on risk prevention, cost control, and long-term return on investment.
Throughout his career, Rafael has overseen residential and development projects totaling more than 250,000 square feet, with deep expertise in feasibility analysis, permitting strategy, construction execution, and financial planning. His work across Southern California focuses on guiding clients through the most critical stage of ADU development where the majority of costly mistakes occur: before construction begins.
Through structured feasibility and strategy reviews, Rafael helps clients identify risks early, protect capital, avoid delays, and maximize rental income potential.
Portfolio & Credentials
Licensed General Contractor – California Founder, Plus Home Construction Master’s Degree in International Business 25+ Years in Construction & RE Development 250,000+ Sqft of Residential Projects Delivered ADU Strategy Consultant Across SCal Specialist in Feasibility, Permits & Risk Management
FAQ — ADU Planner Pro
1. What exactly is ADU Planner Pro, and how is it different from an architect or builder?
ADU Planner Pro provides independent guidance to help you decide if an ADU makes sense before you hire anyone. Unlike architects or builders, the focus is on feasibility, real costs, and risks—not selling design or construction services.
2. Do you help homeowners decide whether they should build an ADU, or just how to build one?
Both. In many cases, the most valuable outcome is confirming whether an ADU is the right move at all. Sometimes the best decision is to wait or not build—and that’s considered a success.
3. Is ADU Planner Pro independent, or are you trying to sell construction services?
ADU Planner Pro is advisory-first and independent. The consulting work is focused solely on helping you make an informed decision, with no obligation to hire any architect or builder.
4. How much the Strategy Session cost?
The strategy session cost $2,000.00 (flat fee). The consult reviews your property, zoning considerations, realistic cost ranges, city requirements, and potential red flags. You’ll leave with clarity on what’s possible, what to avoid, and what next steps make sense.
5. When is the right time to book an ADU Strategy consult?
The best time is before you spend money on design, plans, or contractor estimates. Most clients book a consult when they are planning an ADU in the next 6–12 months and want to avoid expensive mistakes.
6. Can you tell me if an ADU is allowed on my specific property?
Yes, the consult includes a feasibility review based on your city’s ADU rules and your property’s characteristics. While final approval always comes from the city, the goal is to identify likely issues early and reduce surprises.
7. Will you provide construction cost estimates or bids?
No formal bids are provided. Instead, you’ll receive realistic cost ranges based on real-world ADU experience, which helps you budget accurately and avoid misleading early estimates.
8. Do I have to build my ADU with you after the consult?
Not at all. You are free to work with any architect or builder you choose. The consult is designed to help you make a confident decision—nothing more. However, If you decide to build with ADU Planner Pro’s construction partner, Plus Home Construction, the full $2,000 flat fee will be credited back toward the construction contract.
9. What areas do you serve?
ADU Planner Pro works with homeowners and investors in Orange County, Los Angeles, and San Diego. The guidance is based on city-specific ADU rules and local experience.
10. Who is this service not a good fit for?
This service is not ideal for homeowners who are just casually exploring or looking for free advice. It’s best suited for those who own a property and want clear, professional guidance before making a major investment.
Planning an ADU? Starts with Strategy
Feasibility Review, Risk Analysis, Budget Strategy, ROI Planning