A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Rancho San Diego, CA
Lodgewick ADU San Diego builds accessory dwelling units, garage conversions, and home additions in Rancho San Diego. Most of the homes we work on here sit on generous 1970s – 1990s lots with detached garages or unused rear yards, which means ADU placement is different on nearly every street. The hot, dry climate and county-specific building rules also shape how we approach foundation work, cooling design, and materials. If you’re considering an ADU in Rancho San Diego and want a written price before anything starts, call (619) 376-2760.
Why Rancho San Diego Homes Are Different
The housing stock in Rancho San Diego is mostly wood-frame construction on concrete slabs, with a share of hillside custom homes that include daylight basements or large crawlspaces. That matters when you’re planning an ADU: a flat-lot conversion on a slab is a very different job than a hillside build that needs county grading review before a single footing goes in. Many properties in this unincorporated community have no HOA to answer to, but they do fall under San Diego County setback rules and hillside grading ordinances. We see expansive clay soils across much of the area, so foundation design often requires additional geotechnical review. The climate pushes cooling to the top of the priority list; Santa Ana wind events also make fire-resistant siding and ember-resistant venting worth planning for from day one. Russ Delmar, who leads our team, reviews every Rancho San Diego site plan with these conditions in mind before we quote a job.
Our Main Rancho San Diego Services
These are the three projects Rancho San Diego homeowners ask us about most. Each has its own dedicated page with local pricing, process details, and answers to the common “what will this cost me” questions.
Home Addition Contractor in Rancho San Diego
Adding square footage to a Rancho San Diego home usually means tying into the existing wood frame and slab foundation, and matching the roofline of a 1970s – 1990s ranch or two-story. We handle the structural connection, county permitting, and the finish work so the addition doesn’t look like an afterthought. Clay soil on many lots here can mean a deeper or wider footing than a typical San Diego plan would call for. For a full breakdown of what an addition costs in this area, see our Home Addition Contractor in Rancho San Diego page.
Garage Conversion Contractor in Rancho San Diego
Many Rancho San Diego homes have detached garages or extra RV parking, and those structures convert into livable space faster than a ground-up ADU build. The existing slab and roofline often need reinforcement, and we address cooling from the start because a converted garage in this climate becomes unusable without proper insulation and HVAC. Some conversions also trigger county parking or setback reviews. See Garage Conversion Contractor in Rancho San Diego for pricing and what the permit path looks like.
ADU Builders in Rancho San Diego
A ground-up ADU in Rancho San Diego is typically placed in a rear yard that currently does nothing but hold grass and maybe a shed. County setbacks, hillside grading rules, and clay soil conditions make every placement site-specific, so we evaluate the lot before quoting rather than offering a generic price. We work with prefab manufacturers where they fit, which can cut months off a build. Read our ADU Builders in Rancho San Diego page for a detailed cost breakdown and timeline expectations.
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 Rancho San Diego
We install and finish ADUs built by Abodu, Plant Prefab, and Tuff Shed, and we specify James Hardie siding on many Rancho San Diego projects because it handles the Santa Ana wind season better than most alternatives. Parts and materials for these brands are sourced through our local supply partners, which keeps lead times short. See our brands for the full list.
Pricing for ADU Company in Rancho San Diego, CA
| Service | Typical range in Rancho San Diego |
|---|---|
| Detached ADU (1 bed, 1 bath, ~500 sq ft) | $180,000 – $260,000 |
| Detached ADU (2 bed, 1 bath, ~750 sq ft) | $240,000 – $340,000 |
| Garage conversion to ADU (attached) | $95,000 – $150,000 |
| Garage conversion to ADU (detached) | $120,000 – $185,000 |
| JADU (junior ADU inside existing home) | $70,000 – $110,000 |
| Home addition (primary suite, ~400 sq ft) | $140,000 – $210,000 |
| Home addition (family room, ~300 sq ft) | $95,000 – $150,000 |
| Second-story addition (2 beds, 1 bath) | $250,000 – $380,000 |
| Prefab ADU (turnkey install, includes site work) | $160,000 – $230,000 |
Hillside lots and expansive clay soil push foundation costs higher in Rancho San Diego than in flatter parts of the county. Every Lodgewick project gets a written price before work starts, and that price does not change at the door.
Neighborhoods We Serve in Rancho San Diego
We work across the Rancho San Diego area, from the neighborhoods off Jamacha Road up to the hillside streets near the Cuyamaca College side. Response times for estimates in this area are typically within a day or two, depending on the season.
- Rancho San Diego Village
- Cottonwood
- Avocado Estates
- Steele Canyon area
- Millar Ranch Road corridor
Service Area – Cities Near Rancho San Diego
Lodgewick ADU San Diego serves Rancho San Diego and the surrounding East County communities. If you’re just over the border in San Diego, CA, down in Chula Vista, CA, west in La Mesa, CA, or up toward Poway, CA, the same written-price guarantee applies on every project.
Serving Rancho San Diego, CA - Our Local Coverage Area
We’re based in the Rancho San Diego 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 Rancho San Diego
Once a site plan is approved and permits are pulled, work typically begins within a few weeks. Scheduling depends on the season and the project type, but we’ll give you a written arrival window for every phase before work starts. Call (619) 376-2760 to check current availability for an estimate.
Yes. Rancho San Diego is unincorporated San Diego County, so projects go through county planning and building rather than a city hall. That means county setback rules, hillside grading review, and sometimes septic or drainage review. We handle the full permit package and don’t start work until it’s approved.
No. Your written price is the price, fixed before the first day of work. If site conditions reveal something unexpected, we bring it to you in writing before any additional work is approved. No surprise change orders at the end of the job. Call (619) 376-2760 to schedule a free estimate and get your number in writing.
If you’re ready to talk about an ADU, garage conversion, or home addition in Rancho San Diego, call Lodgewick ADU San Diego at (619) 376-2760 for a free, no-pressure estimate. We’ll give you a written price, answer your questions straight, and put the 365-Day Done Right Promise in writing on the spot.
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 Rancho San Diego Customers Say
"Built a backyard unit for my mother in law. They handled the permits, gave me a real timeline, and stuck to it within a few days. The written price is what we paid, which anyone who's done construction knows is rare."
- Dennis Fairchild"Quality work on a home addition. It did run a few weeks longer than the original estimate, mostly waiting on the city for inspections, which they explained. The build itself was done right."
- Marcus Delgado"Added a suite for my dad. They walked us through every cost before a hammer swung and stuck to it. The written price is what we paid, no change orders."
- Ingrid Salazar
