Frequently Asked Questions

A garage conversion in Aliso Viejo typically takes 4 to 6 months from permit approval to final inspection. A detached ADU runs 9 to 14 months depending on size, site conditions, and city review cycles. The two biggest schedule variables in Aliso Viejo are HOA design review (if your community requires it) and the City of Aliso Viejo's plan check queue, which fluctuates seasonally. We handle the permit submittal and all coordination with the city so you're not chasing status updates. We'll give you a phased timeline during the estimate.

It starts with a site visit and feasibility check, where we look at your lot, setbacks, utility access, and HOA constraints if any. Next we produce a design and a fixed written estimate. Once you approve, we engineer the plans, submit to the City of Aliso Viejo, and pull permits. Then construction begins: site work, foundation, framing, mechanicals, drywall, finishes, and landscaping restore. We finish with final inspections and hand you a complete permit package. You'll know what's happening and what's next at every stage.

Yes. We prepare and submit the full permit package to the City of Aliso Viejo, including site plans, structural drawings, energy calculations (Title 24), and any required fire sprinkler design. If your property falls under an HOA, we also assemble the design review submittal your association needs. Aliso Viejo enforces California's ADU laws, which limit how much the city can ask for, but local nuances still apply. We track everything through approval and post the permit card on site during construction.

If your home is in a planned community with an HOA, almost certainly yes. Many Aliso Viejo neighborhoods, including tracts around Town Center and the western hills, have design guidelines covering exterior finishes, rooflines, and sometimes even where the ADU can sit on the lot. California law limits how much power HOAs have over ADUs, but they can absolutely require design review. We help you understand your specific HOA's rules early so you don't fall in love with a plan that won't pass.

In most cases, yes, but expect additional engineering. Hillside lots common in neighborhoods like Ridgecrest and Vista Summit often require retaining walls, caissons or piers, stepped foundations, and more careful drainage design. That work adds cost and time to the project. It also makes the ADU more interesting: split-level floor plans, view-facing windows, and walkout yards. We've built on slopes throughout Aliso Viejo and know what the soils and the city will require before the first shovel hits dirt.

We can. If you've already chosen a prefab unit from Abodu or Cover, we can handle the site work, foundation, utility connections, and finish details that a factory-built module requires here in Aliso Viejo. If you're still deciding between prefab and stick-built, we'll walk you honestly through the tradeoffs: prefab speeds up framing but constrains design choices and ceiling heights, while stick-built fits odd lots and HOA design rules more flexibly. Either way, our fixed-price process applies to the work we perform.

We spec materials based on Aliso Viejo's coastal-influenced climate, HOA requirements, and your budget. Fiber cement products like James Hardie siding hold up well against the marine layer and summer heat without warping or fading, and they accept paint well for HOA-approved color palettes. For high-performance custom builds, a Dvele-style panelized wall system can deliver better insulation and air sealing than conventional framing. We also use standard stucco and board-and-batten where the design calls for it. You'll see exact products and warranties in your estimate.

For most Aliso Viejo properties, yes. James Hardie fiber cement outperforms wood and vinyl in fire resistance, moisture resistance, and dimensional stability, which matters more in canyon-adjacent areas of Aliso Viejo that face higher wildfire risk. It also holds paint longer, an advantage when your HOA enforces specific exterior colors. The upfront cost runs higher than basic stucco or engineered wood, but reduced maintenance and better insurance acceptance often offset that over a decade. We can show you side-by-side samples during your estimate.

Yes. Every professional working under our name is required to hold the license and insurance their state and trade requires. For ADU construction in Aliso Viejo, that means a California general building contractor license, workers' compensation coverage for any crew on your property, and general liability insurance. We're also insured and bonded, and we're happy to provide certificates of insurance before work begins. Your mortgage lender or HOA may ask for these documents, and we make them easy to get.

Talk to your homeowner's insurance agent before construction starts. Most policies cover the existing house during a remodel or addition, but you'll want to confirm coverage for the new structure while it's under construction and after it's complete. If the ADU will be a rental, you'll also need landlord coverage once it's occupied. Some Aliso Viejo homeowners with ADUs near wildfire interface zones find their insurer asks for defensible space documentation. We can point you toward what's needed, but your agent has the final word.

We pull all permits. The City of Aliso Viejo requires a building permit for any ADU project, and most require separate electrical, plumbing, and mechanical permits too. Depending on your site, there may also be grading permits or fire sprinkler permits. We handle every one of these: preparing the plans, submitting the application, paying the fees, scheduling inspections, and making any corrections the city requests. You'll get a copy of the approved permit and the final signed inspection card when the project closes.

If we're converting an attached structure and find an issue, like rotted framing, a cracked slab, or termite damage, we stop and document it immediately. You'll get photos, a clear explanation of what we found, and a written price for the fix before any additional work proceeds. Because we work on many aging Aliso Viejo homes from the 1970s and 1980s, these discoveries are common and rarely catastrophic. Often the fix is simpler than it sounds. Either way, you approve every dollar before we spend it.

Absolutely. Our office hours are Monday through Friday from 7:00 AM to 7:00 PM, and Sunday from 7:00 AM to 7:00 PM. We're closed Saturdays. When you call (855) 949-1913, you'll reach a live coordinator who can access your project file, answer scheduling questions, or connect you with the construction team. For non-urgent matters, leave a message outside those hours and we'll return your call on the next business day. You'll never wonder who to call about your project.

You can request changes, but understand that the timing matters. Changes made before framing or rough-in are easy to accommodate with minimal schedule impact. Changes after drywall goes up are possible but more expensive because they involve demo and rework. Every change goes through a written change order: what's changing, what it costs, and how it affects the schedule. You sign before we act. This discipline keeps your budget accurate and prevents the kind of small, drifting scope creep that breaks ADU timelines in Aliso Viejo.

Our ADUs carry a workmanship warranty covering construction defects, and manufacturer warranties apply to installed products like windows, roofing, siding, appliances, and HVAC equipment. The specific terms vary by component: a James Hardie siding install carries the manufacturer's material warranty plus our labor coverage, while a water heater or mini-split has its own brand warranty. We document every product installed at your Aliso Viejo property and provide a warranty packet at project close so you know exactly what's covered and who to call if something fails.

Our standard workmanship warranty covers construction defects for a period stated in your contract, typically one year on labor with extended coverage on structural elements like foundation and framing. Manufacturer warranties on materials and systems often run longer, sometimes 10 years or more depending on the product. California law requires specific implied warranties on new construction, and our written warranty meets or exceeds those requirements. You'll receive the full warranty language in your contract before signing, so there's no ambiguity.

Call (855) 949-1913 and describe the issue. We'll review your project file, check the applicable warranty, and send someone out to assess it. If it's covered under our workmanship warranty, we schedule the repair at no cost to you. If it's a product issue, we'll help you navigate the manufacturer's warranty claim and coordinate the repair or replacement. Our goal is that every ADU we build in Aliso Viejo performs for decades, and we stand behind the work even after the final check clears.

Our pricing is fixed once you sign the contract. That's a hard commitment: the number on the page is the number you pay, barring a written change order you approve. On schedule, we commit to a phased timeline and keep you informed if anything shifts. No contractor can guarantee exact completion dates on complex construction; inspections, weather, material lead times, and HOA reviews all move. But we can guarantee you'll know where the project stands at every stage, and that we'll do everything possible to hit the dates we give you.

Yes, in layers. California law provides statutory protections for new residential construction, including ADUs. Product manufacturers carry their own warranties, and those pass through to you as the homeowner. For example, a James Hardie installation carries both our workmanship coverage and Hardie's material warranty, which runs for decades under normal conditions. Structural elements like roof systems and windows typically carry the longest manufacturer coverage. We compile every warranty document into a single folder you receive at closeout.

Ask three questions: what does the workmanship warranty cover and for how long, are manufacturer warranties transferred to me, and what's the process for making a claim. Then ask for the answer in writing. A good contractor hands you a warranty page with clear terms, not vague promises. We provide our warranty language in the contract, and we log every installed product with its manufacturer warranty term so nothing falls through. If a contractor won't put warranty terms in writing, that's a signal to keep looking, even in a market like Aliso Viejo with many builder options.

Written by the team at Sunstone ADU Builders, serving Aliso Viejo, CA since 2011.