A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted ADU Builders for Torrance Homeowners
An accessory dwelling unit in Torrance typically costs between $180,000 and $420,000 for a detached build, with garage conversions running $90,000 to $180,000 depending on site conditions, foundation work, and finish level. Those are real numbers we put in writing before a single permit gets pulled. Reed Calloway leads Fielding ADU Torrance, and every project we take on follows The Garrison Code: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year.
We’re an independently owned member of the Garrison Partners family, founded in 2006, and we specialize in ADU construction, garage conversions, and room additions across Torrance and the South Bay. If you’ve already dealt with a contractor who missed the schedule or moved the price at the door, you know what we’re not going to do. Call (424) 358-3068 and a live person answers, anytime.
Key Takeaways
- Written price before any work starts – the number you approve is the number on the final invoice.
- 365-Day Done Right Promise: every ADU we build is backed in writing for a full year.
- Background-checked, uniformed crew on every Torrance job site.
- We work with leading prefab platforms (Abodu, Cover, Dvele, Mighty Buildings) plus conventional builds.
- Live person answers every call, 24/7. No voicemail, no callback queue.
If you’re comparing quotes or just starting to research whether your Torrance lot can even support an ADU, you can call and ask. We’ll tell you what we know. The estimate is free, and the conversation doesn’t come with a sales pitch.
Written by Reed Calloway, Owner at Fielding ADU Torrance, serving Torrance since 2006.
ADU Construction
ADU Construction is the full build process for an accessory dwelling unit on a Torrance property, from the first site visit through final inspection, and it costs $90,000 to $420,000 depending on whether you’re converting an existing garage or building a detached unit from the slab up. Fielding ADU Torrance handles the whole thing: plans, permits, foundation, framing, MEP rough-in, drywall, finishes, and the final sign-off with the city. We don’t sub out the headache to someone who ghosts you. Our crew is background-checked, uniformed, and on site when we say they’ll be.
Site Evaluation and Feasibility
Before we talk price, we walk your lot. Setbacks, sewer lateral location, existing panel capacity, and access for equipment all affect what’s buildable in Torrance. We measure and document before we quote, so the number holds.
Permit-Ready Construction
We pull permits through the City of Torrance, build to current California Residential Code, and schedule each inspection ourselves. The permit board gets signed off, and you get a copy of everything at closeout. No exceptions.
Detached ADU
A Detached ADU is a standalone living unit built in the backyard of a Torrance home, typically 400 to 1,200 square feet, running $180,000 to $420,000 before permit fees depending on size, utility runs, and foundation conditions. Detached units give you the most flexibility for rental income or multigenerational living because they share no walls with the main house. Fielding ADU Torrance builds them conventionally with James Hardie siding or as prefab and modular installs from Abodu, Cover, Dvele, and Mighty Buildings.
Foundation and Utility Trenching
Torrance soil varies by neighborhood. Some lots in South Torrance have expansive clay, others near the coast in Redondo Beach-adjacent areas sit on sandier ground. We handle the foundation type the soil calls for and trench utilities correctly the first time, so you’re not paying for rework later.
Prefab and Panelized Options
If your lot access is tight or you want to cut site time, a panelized or modular unit from Cover or Dvele can go from delivery to weathertight in weeks, not months. We handle the site work, foundation, utility connections, and finish details so the prefab shell becomes a finished home.
JADU
A JADU, or junior accessory dwelling unit, is a conversion of existing space inside your Torrance home, typically 500 square feet or less with its own entrance and a small kitchen, and it runs $60,000 to $130,000 depending on how much plumbing and electrical work the space needs. JADUs are the least expensive path to a legal rental unit because they use space you already have. Fielding ADU Torrance converts attached garages, bonus rooms, and underused floor area into code-compliant JADUs with a written price and a full year of written guarantee.
Garage and Room Conversions
Most Torrance JADUs come from attached garages, which already have the footprint and often the electrical service. We insulate, level floors, add the required egress, wire the kitchenette, and pull the permit. The work is done by the book, and the city inspects and signs off.
Separate Entrance Requirements
Torrance requires a JADU to have its own entrance and a bathroom. If your layout doesn’t support that cleanly, we’ll tell you during the estimate and lay out your options, including whether a full ADU makes more sense for your floor plan.
ADU Plans
ADU Plans are the architectural drawings and permit documents required before any Torrance ADU can be built, and they typically cost $8,000 to $25,000 depending on whether you need a full site survey, structural engineering, or Title 24 energy calculations. We produce or coordinate plans that meet City of Torrance planning and building requirements, including setbacks, height limits, and parking standards. The price for plans is included in our written construction quote when we build the unit, so you’re not paying a separate architect and hoping the drawings survive contact with a builder.
Planning Department Submittal
Torrance’s planning department reviews ADU applications for zoning compliance before building and safety reviews the structural package. We submit the plans, respond to plan check comments, and track the permit to issuance. You get status updates in plain English, not planning jargon.
Setback and Height Compliance
California state law now caps some local restrictions, but Torrance still enforces specific setbacks, lot coverage limits, and height rules. If your build needs a setback variance, we walk you through that written permission to build closer to the property line than the standard rule allows, and we handle the application.
ADU Contractor
An ADU Contractor is the licensed general contractor who carries the permit, manages the subs, and answers for the finished product, and in Torrance that role costs 15% to 20% of the total project value on top of labor and materials, which is built into our written quote. Fielding ADU Torrance is the ADU and room-addition specialist inside the Garrison Partners family, and we hold ourselves to The Garrison Standard: a written price upfront, permitted work done by the book, and a full year of written guarantee. Reed Calloway stays reachable on every job, and a live person answers our phone 24 hours a day, 7 days a week.
Single Point of Accountability
When you hire us, you’re not managing three subcontractors and a designer who don’t talk to each other. You deal with one crew, one schedule, one person to call when something changes. That structure is what keeps the price from drifting.
Change Order Discipline
If you change the finish package mid-build, we price the change in writing before we do the work. If the change is on us, because we missed something in the estimate, the correction is on us. The Garrison Code says the number you approve on day one is the number on the final invoice, and we mean it.
ADU Design
ADU Design is the process of turning your Torrance property’s constraints into a floor plan, elevations, and specification package that fits your budget, and design services typically run $5,000 to $15,000 when priced separately, though we fold design into the total project cost when we build. Fielding ADU Torrance designs for the way people actually live in a small space: clearances that work, storage that functions, a bathroom you can turn around in. We work with prefab and modular platforms like Abodu and Dvele when their factory designs match the lot, and we design conventional builds with James Hardie siding to match the main house.
Matching the Main House
Torrance has neighborhoods with strong architectural character, from the mid-century tracts in central Torrance to the newer builds up in the hills. We design the ADU to sit naturally on your lot, with roof pitches and finishes that read as part of the property rather than a box dropped in the yard.
Budget-Driven Design
The design phase is where cost gets controlled or lost. We price each design decision as it happens, so you know what that extra window or higher ceiling costs before you commit. No surprises at the end, because we never let the design run past what you approved.
Backyard ADU
A Backyard ADU is a detached accessory dwelling unit built in the rear yard of your Torrance property, and the cost typically runs $180,000 to $420,000 before permit fees depending on the foundation, utility distances, and finish level. It’s the option most homeowners choose when they want rental income or a long-term place for family that doesn’t share a wall with the main house. Fielding ADU Torrance builds backyard ADUs conventionally stick-framed or as modular units from Mighty Buildings and Plant Prefab, installed on a foundation we pour and connect to the utilities we trench.
Lot Access and Crane Coordination
If your backyard is behind a narrow gate, a factory-built module may need a crane. We survey the access before we quote, so the craning is in the price, not a surprise line item after excavation starts.
Utility Connections and Metering
Separate metering for a backyard rental unit means your tenant pays their own power and water. We handle the panel work, sub-metering, and sewer or septic connections as part of the build, all permitted and inspected in Torrance.
Brands We Service
We build and finish units from Abodu, Cover, Dvele, and Mighty Buildings, and we know how each platform’s shells arrive, what site work they require, and what finishes they need to meet Torrance code. Some units come in panels; some come as factory-finished modules with a crane. Our crew has trained on the connection details for these systems, so the on-site work matches the factory’s engineering.
We also build conventional ADUs, garage conversions, and room additions using James Hardie siding and Tuff Shed-style structures where the budget calls for it. Whether you have a prefab unit in mind or a stick-built plan, we can match the right build method to your budget and lot. If you’re working with one of these brands already, we can take over the site work and finish; if you’re deciding, we can lay out your options honestly.
Signs You Need a Pro Right Now
- Your contractor stopped returning calls. If the permit is pulled and the site is sitting quiet, you have an exposed foundation or partially framed walls in Torrance’s coastal air. The longer a build sits unfinished, the more weather damage accrues, and the city may flag an abandoned permit. Call us and we’ll assess where the work stands and what it takes to finish it.
- You got a quote that moved after you signed. A written price that changes at the door is not an estimate, it’s a tactic. If your current builder is asking for more money before the work that was agreed is done, we can review your contract and your site and tell you what a fair finish cost actually is.
- The city wrote you a stop-work notice or correction. Torrance code enforcement doesn’t send warnings twice. Ignoring a correction notice can mean fines and, eventually, a lien on your property. We can pull the records, fix what’s non-compliant, and get the permit cleared.
- Your ADU plans got rejected twice. Plan check rejections burn time and money. If your architect or designer can’t get through Torrance’s planning department, we bring plans that have passed before and handle the resubmittal ourselves. We know what the city looks for, including setbacks, parking, and energy compliance.
- You’re hoping to rent by a date that’s already slipping. Every month an ADU isn’t finished in Torrance is a month of rent you don’t collect, at rates that currently run $2,400 to $3,200 for a one-bedroom unit. If your current builder’s schedule is fiction, call us and we’ll give you a real one, in writing.
Our Process, Step by Step
- 1
Free site walk and feasibility check. We come out to your Torrance property, measure the lot, check access, look at your electrical panel, and identify any site conditions that will shape the build. You get a plain-English summary of what’s possible and what it will cost, with no obligation to proceed.
- 2
Written price and scope. Before any work starts, we hand you a written price covering the full scope: plans, permits, labor, materials, finishes, and site work. The number you approve is the number on the final invoice. If anything changes later, the change is priced in writing and approved by you first.
- 3
Plans, permits, and scheduling. We produce or coordinate the ADU Plans, submit to the City of Torrance, and track the permit to issuance. You get a schedule with actual dates, and the crew shows up in the window we name. Background-checked, uniformed, and identifiable.
- 4
Construction and inspections. We build to code, schedule every city inspection, and walk the site with you at key milestones so you can see the work. No change orders happen without your signature. The permit board gets signed off, and you get copies of everything.
- 5
Closeout and the 365-Day Done Right Promise. When the final inspection passes, we do a punch list walk with you, hand over the keys and the paperwork, and the written one-year guarantee begins. If anything fails inside that year, we come back and make it right at no charge. That’s the Garrison Standard.
We’ve been building to this standard since 2006, and it’s not a marketing line. It’s how we run every job, from a garage conversion in Inglewood to a detached ADU in Compton to a backyard unit here in Torrance.
How Much Does ADU Builders Cost in Torrance?
A typical detached ADU in Torrance runs $180,000 to $420,000, while a garage conversion to a JADU or full ADU runs $90,000 to $180,000. Prefab and modular units from Abodu, Cover, or Dvele land in the middle to upper end of those ranges depending on the model, site prep, and utility distances. Here’s how the numbers break down:
- Site work and foundation: $25,000 to $60,000, depending on soil, grading, and access.
- Plans and permitting: $8,000 to $25,000 including architecture, engineering, and Title 24.
- Framing and shell: $40,000 to $120,000 for stick-built; less for panelized prefab.
- Rough MEP (electrical, plumbing, HVAC): $30,000 to $70,000.
- Interior finishes: $35,000 to $90,000 depending on fixtures, flooring, and cabinetry.
- Utility connections and site finish: $15,000 to $40,000.
What drives the price most is the foundation condition and the utility run distance. A lot in South Torrance with clay soil and a sewer lateral 80 feet from the build site costs more than a flat lot with utilities close. What shouldn’t drive the price up after you sign is the contractor’s mood. Our written price holds. The free estimate covers the full scope, with labor, materials, and permits itemized, so you can compare apples to apples. Call (424) 358-3068 and we’ll schedule the site walk. You’ll have real numbers within days, not weeks.
Our Service Area Near Torrance
Fielding ADU Torrance serves the South Bay and surrounding communities, including Redondo Beach, Harbor City, Lomita, Palos Verdes Estates, Rolling Hills Estates, West Carson, and the nearby cities of Inglewood and Compton through our Inglewood ADU team and Compton ADU team. If you’re in Paramount, Lennox, or Florence-Graham, we cross those borders regularly. For a full look at what we do, start at our home page or explore ADU Builders in Torrance for more local detail. Typical response time for a site visit in Torrance is within a few business days, and the quote follows fast after we walk the lot.
Serving Torrance, CA - Our Local Coverage Area
We’re based in the Torrance area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About ADU Builders in Torrance
An ADU builder is a licensed general contractor who designs, permits, and constructs accessory dwelling units, including detached backyard units, garage conversions, and JADUs. In Torrance, the builder carries the permit, manages every trade, and answers for the finished product. We handle the whole job from site walk to final inspection, with a written price before any work starts.
A garage conversion or JADU typically takes 4 to 7 months from permit submittal to final inspection. A detached ADU usually runs 8 to 14 months depending on site work, foundation type, and whether you’re building stick-frame or installing a prefab unit. Permit review times in Torrance vary by workload, and we track that for you. Call (424) 358-3068 and we’ll give you a realistic schedule for your specific property.
Garage conversions and JADUs run $90,000 to $180,000, and detached ADUs run $180,000 to $420,000 before permit fees. The spread depends on foundation work, utility distances, finish level, and whether you choose a prefab platform like Abodu or a conventional build. Our written quote itemizes every cost so you know exactly where your money goes.
Yes, we build and finish units from Abodu, Cover, Dvele, and Mighty Buildings, and we handle the site work, foundation, utility connections, and interior finish for each. If you’ve already bought a unit or are comparing platforms, we can give you straight answers about which system fits your Torrance lot and budget.
We’re not an emergency contractor in the storm-damage sense, but if your build has stalled, your contractor walked off, or the city posted a correction, call us and we’ll respond quickly. A live person answers our phone 24 hours a day, 7 days a week, and we’ll assess what it takes to get your project moving again. The estimate to finish someone else’s half-done work is free.
Every ADU we build is covered by the 365-Day Done Right Promise, a written guarantee that spells out exactly what’s covered, how long it runs, and how we make it right if something fails. If the work fails inside that year, we return and correct the defect at no charge. The guarantee is on paper, not implied, and it’s part of The Garrison Standard.
Have your property’s parcel number or address ready, know roughly where the utility panel and sewer line sit, and think about how you’ll use the unit: rental income, family housing, or a home office. We measure the lot, check access, and look at the existing electrical service. You don’t need to have plans drawn, and the visit is free.
Schedule Your ADU Builders Service in Torrance Today
Call (424) 358-3068 to schedule a free site walk and written estimate. A live person answers, day or night. You’ll get real numbers for your Torrance ADU before you commit to anything, and the price we put in writing is the price you’ll pay at the end. No pressure, no obligation, no surprises.
Written by Reed Calloway, Owner at Fielding ADU Torrance, serving Torrance since 2006.
