A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in San Juan Capistrano, CA
San Juan Capistrano isn’t a typical suburban market for ADUs and additions. Between the historic preservation rules, equestrian-zoned lots, and the mix of 1950s ranches and newer Mediterranean homes, most projects here need more design care and permitting patience than a comparable job in Mission Viejo or Lake Forest. We’re Lodgewick ADU Orange County, and we’ve worked through those layers enough to know what gets approved, what gets flagged, and what homeowners should budget for before they start. If you’re weighing a garage conversion, a detached ADU, or a room addition in San Juan Capistrano, call us at (350) 203-6060 for a free estimate and a written price before any work starts.
Why San Juan Capistrano Homes Are Different
The housing stock here tells the story. A large share of San Juan Capistrano homes are ranch-style builds from the 1950s through the 1970s, many on oversized lots that were originally platted for horses. Those lots are often bigger than what you’ll find in neighboring cities, which sounds great for an ADU, but the catch is that a lot of them sit in unincorporated pockets where septic systems still handle waste. Adding a second dwelling to a septic-served property triggers a percolation test and sometimes a system upgrade, which can add $15,000 to $40,000 before a single wall goes up. Even inside city limits, the architectural review process is stricter than most Orange County cities because of the Spanish Colonial Revival character the city protects. New ADUs and additions are routinely required to match the primary home’s roofline, window proportions, and finish materials, and in the Los Rios Historic District south of downtown, the review bar is higher still. Handmade clay roof tiles and custom wood windows in that district can push a project’s cost well past what the same square footage would run in Dana Point.
The climate also shapes how we build. Warm, dry summers with occasional Santa Ana wind events mean ADUs need real insulation and ventilation, not just code minimums, and hillside lots in the eastern part of the city carry fire-resistance requirements on exterior materials. None of this makes San Juan Capistrano a bad place to build. It just means the planning stage matters more here, and a written, fixed price matters more here, because the variables are real.
Our Main San Juan Capistrano Services
San Juan Capistrano homeowners call us most often about two things: adding square footage to an existing home and converting an underused garage into living space. Both routes have their own San Juan Capistrano pages with full detail, pricing, and local permitting notes.
Home Addition Contractor in San Juan Capistrano
Room additions in San Juan Capistrano usually fall into two camps: bump-outs and second-story work on older ranch homes, or larger ground-floor expansions on the newer Mediterranean-style lots in neighborhoods like Marbella and San Juan Hills. The design review process is the biggest variable. The city wants new rooflines to read as part of the original house, not as an attached afterthought, which affects everything from fascia height to stucco texture. On hillside lots along Del Obispo and Camino Las Ramblas, we also contend with slope setbacks and fire-resistance rules on exterior walls. Every addition we price includes the architectural review realities up front, not as a surprise change order. See the full breakdown at Home Addition Contractor in San Juan Capistrano.
Garage Conversion Contractor in San Juan Capistrano
A garage conversion is often the fastest path to a rentable unit or an in-law suite in San Juan Capistrano, especially on the older ranch lots where detached garages sit far from the main house. Those 1950s and 1960s garages usually need full electrical upgrades, insulation, and new slab work before they can legally become living space, and homes on septic will need the system evaluated for the added bedroom count. The upside is that conversions skip most of the new-structure review that a detached ADU triggers, which can shorten the permit timeline meaningfully. For the full San Juan Capistrano cost range and process, see Garage Conversion Contractor in San Juan Capistrano.
ADU Builders in San Juan Capistrano
Detached ADUs in San Juan Capistrano run the gamut from prefab units we place on a prepared foundation to fully custom builds designed to match a Spanish Colonial Revival primary home. Prefab options like Abodu and Cover work well on flat, accessible lots, while custom framing makes more sense on sloped or oddly shaped parcels, which San Juan Capistrano has plenty of. The city’s design guidelines mean an ADU’s exterior materials, window style, and roof pitch are reviewed against the main house, so we plan for that review from day one. Read the full San Juan Capistrano ADU guide at ADU Builders in San Juan Capistrano.
What happens when you call
- 1
A real person answersNo phone trees - you reach a local pro.
- 2
You get an upfront price rangeHonest numbers before anyone is dispatched.
- 3
A background-checked tech heads outLicensed & insured, dispatched right away.
- 4
You approve before work beginsNothing starts until you say go.
Brands We Service in San Juan Capistrano
We work hands-on with several ADU manufacturers and material systems, including Abodu, Cover, and Dvele. Each has different lead times and structural approaches, and the right choice depends on your lot, your budget, and San Juan Capistrano’s design review requirements. See what we install and service at our brands.
Pricing for ADU Company in San Juan Capistrano, CA
| Service | Typical range in San Juan Capistrano |
|---|---|
| Home addition (attached, ground floor) | $380 – $520 per sq ft |
| Home addition (second story) | $450 – $650 per sq ft |
| Detached ADU (prefab, 400 – 600 sq ft) | $180,000 – $310,000 |
| Detached ADU (custom, 400 – 600 sq ft) | $240,000 – $400,000 |
| Detached ADU (700 – 1,200 sq ft) | $320,000 – $620,000 |
| Garage conversion (attached, 400 sq ft) | $105,000 – $170,000 |
| Garage conversion (detached, 600 sq ft) | $140,000 – $220,000 |
| Garage conversion (full, 800+ sq ft) | $180,000 – $300,000 |
| Foundation and site work (new ADU) | $25,000 – $70,000 |
| Septic system evaluation or upgrade | $15,000 – $40,000 |
Two things push costs higher in San Juan Capistrano than in nearby cities: design review requirements for historic and Spanish Colonial Revival aesthetics, and septic work on the unincorporated equestrian lots. Every price we give is written, fixed, and includes the permit path and the materials specified. No change orders at the door.
Neighborhoods We Serve in San Juan Capistrano
We work across the full city, from the equestrian lots east of the 5 to the hillside subdivisions along Ortega Highway and the older ranch streets near Mission San Juan Capistrano.
- Los Rios Historic District
- Marbella
- San Juan Hills
- Mission Flats
- Hunt Club
Response time for a written estimate in San Juan Capistrano is typically within a few business days, and we schedule site visits around your availability, not the other way around.
Service Area – Cities Near San Juan Capistrano
Lodgewick ADU Orange County also serves homeowners in the communities around San Juan Capistrano. If you’re just over the city line, we cover Laguna Niguel, CA, Laguna Hills, CA, Lake Forest, CA, and Tustin, CA. Dispatch and scheduling are coordinated from our Los Angeles office, and crews serve San Juan Capistrano locally.
Serving San Juan Capistrano, CA - Our Local Coverage Area
We’re based in the San Juan Capistrano 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 ADU Company in San Juan Capistrano
We typically schedule a site visit and deliver a written, line-item estimate within a few business days of your call. The estimate is fixed, and you’ll have it in hand before you commit to anything. Call (350) 203-6060 to set one up.
Most ADUs and additions in San Juan Capistrano go through some level of design review, especially in historic districts or when the property has Spanish Colonial Revival character. We handle the submittal, meet with reviewers, and build around what the city approves. The design review path is baked into our written price.
No. The price we give you in writing before work begins is the price you pay, and it includes the permit filing, the materials we specified, and the labor. If something in the field reveals a real conflict with the city’s requirements, we address it in writing before any change is made, never after the fact.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What San Juan Capistrano Customers Say
"Detached unit in the backyard for rental income. They handled design and permits and gave me a real schedule. Came in close to on time and exactly on the written price."
- Benjamin Stahl"Converted our garage into a rental studio. The crew was respectful of the neighbors and kept the site clean. It's bringing in rent now and paid for itself faster than I expected."
- Grace Yoon"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills
