A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateFast, Reliable ADU Builders Across Citrus
ADU construction in Citrus runs on Los Angeles County rules, not city rules. That one fact changes setbacks, septic requirements, electrical service, and cost. Most Citrus homes are 1950s to 1970s ranchers on 5,000 to 7,500 square foot R-1 lots, often with a detached garage or carport that looks like an easy conversion but hides older wiring and cast-iron waste lines. Our ADU Builders team has worked these lots enough to know where the money gets spent before it gets wasted. If you’re weighing a backyard unit, a garage conversion, or a junior ADU inside the house, call Reed Calloway and the Fielding team at (559) 238-9583. We’ll tell you what’s possible and what it costs, in writing, before you commit to plans.
Why Fielding ADU West Covina Is Citrus’s Preferred ADU Builders Company
Fielding ADU West Covina is an independently owned and operated member of the Garrison Partners family, building to The Garrison Standard since 2006. That standard is simple and it is written down: show up in the window, price in writing, by the book, leave it clean, stand behind it for a year. Citrus homeowners who have already been through one bad contractor tend to ask fewer questions about our philosophy and more about whether we actually do what the paper says. We do.
Every project in Citrus gets a written price before any work starts. Not an estimate that drifts. Not a change order at the door. The number you approve is the number on the final invoice. Our crew members are background-checked and arrive in uniform, so you know exactly who is on your property. And when you call (559) 238-9583, a live person answers. No voicemail, no callback queue, at noon or midnight.
Reed Calloway runs the Fielding ADU West Covina operation and handles Citrus projects directly. Dispatch and scheduling are coordinated from the brand’s Los Angeles office, but the crews working your lot are the same ones who know the county setback rules and the local inspectors. That matters when a plan review comment comes back and you need someone who has answered it before.
ADU Plans in Citrus
ADU Plans in Citrus mean something specific: a drawing set that accounts for Los Angeles County zoning, the existing lot’s setbacks, the sewer or septic location, and the electrical service capacity before a single wall is framed. We scope this upfront because on Citrus lots, the plan determines whether the project is a $180,000 detached unit or a $260,000 one. The difference is usually buried underground, not in the finishes.
Garage Footprint Conversions
Most Citrus garages sit 5 feet or less from the side property line. County zoning requires a 5-foot side and 10-foot rear yard setback for new detached structures. Keeping the ADU inside the existing garage footprint means no variance, no public hearing, and a faster plan check. These conversions typically run $140,000 to $210,000 in Citrus depending on foundation work, ceiling height, and the condition of the existing slab.
Junior ADU Strategy
A junior ADU inside the primary home avoids the setback conversation entirely. For Citrus homes where the garage is too far gone or the rear yard is too tight, converting an attached bedroom or family room into a JADU with its own kitchenette and entry often runs $80,000 to $130,000. The county treats it differently than a detached unit, and the plan is simpler because you’re not adding a new structure.
ADU Contractor in Citrus
An ADU Contractor in Citrus has to decide early whether the project is a straightforward garage conversion or a site-intensive build requiring trenching, utility upgrades, and septic coordination. We start every Citrus project with the same triage: where is the electrical panel, where is the waste line, and how far is the proposed ADU from both. Those three answers set the price more than any finish selection.
Electrical Service Upgrades
The typical Citrus home still has a 100-amp panel inside the main house. A detached ADU with a mini-split, range, and water heater needs its own feeder, and that often means a new 200-amp service at the main panel plus a trench across the driveway or yard. On Citrus lots where the garage sits 30 to 60 feet from the house, that trench alone adds $6,000 to $12,000. We price it before plans are locked, not after the slab is poured.
Septic and Setback Reality
Citrus sits in unincorporated Los Angeles County, and a meaningful share of the acreage properties rely on septic systems, not sewer. County health code sets minimum distances between a septic tank, its leach field, and any new dwelling. If the proposed ADU location violates those distances, the project either moves or requires an engineered septic upgrade. We have watched quotes arrive at $40,000 over budget because nobody checked this before the plans were drawn. We check it first.
Trusted Brands We Service in Citrus
We work with the major prefab and modular platforms Citrus homeowners are already researching: Abodu, Cover, and Dvele, plus conventional builds using James Hardie siding and Tuff Shed-style structures for shop conversions and accessory buildings. Prefab works well on open Citrus acreage where the unit arrives on a truck and gets set with a crane. Conventional framing suits tight infill lots where the county’s setback rules force a custom footprint. We stock common hardware and coordinate the brand’s factory specs with county plan review, which is where prefab projects usually stall. Call (559) 238-9583 and we’ll tell you which method fits your lot and budget, with real numbers.
Common ADU Builders Problems We See in Citrus Homes
- Electrical service that ends at the house, not the garage. The original 100-amp panel is inside the home, and the detached garage was never wired for a dwelling. Running a new 200-amp feeder across a 30 to 60 foot driveway is one of the most under-bid items we see in Citrus.
- Cast-iron waste lines with hard water scale. Citrus receives imported water that leaves mineral deposits inside old piping. A 60-year-old cast-iron line can look fine on camera and fail under the added load of a new bathroom and kitchen. We sleeve or replace them when the trench is already open.
- Expansive clay soils under the slab. Citrus’s wet-dry cycles cause the local clay to shrink and swell. A standard slab-on-grade foundation poured without accounting for that movement cracks. We specify reinforcement and soil prep that match the lot, not a template.
- Setbacks that quietly kill the design. The 5-foot side and 10-foot rear yard rules mean many Citrus backyards simply cannot fit a detached ADU where the homeowner pictured it. We flag this on the first visit, before anyone spends money on drawings.
Pricing for ADU Builders in Citrus, CA
Here are the numbers we quote most often in Citrus, before permit fees and utility connection charges. A garage conversion within the existing footprint: $140,000 to $210,000. A junior ADU inside the primary home: $80,000 to $130,000. A new detached 480 to 600 square foot ADU in the rear yard: $190,000 to $280,000, and the high end includes the electrical service upgrade and foundation work the lot actually needs. Prefab units from Abodu or Cover typically land between $220,000 and $320,000 once site work, utility connections, and plan review are included. Septic upgrades, long trenching runs, and expansive soil remediation push toward the top of each range. Every quote is written, line-itemed, and fixed before work starts. Call (559) 238-9583 for your free estimate.
On a dead-end street near Citrus Avenue and Route 66, our crew converted a 1960s detached two-car garage into a 480-square-foot ADU. The original 100-amp panel could not support the new mini-split and induction range, so we trenched a new 200-amp service across the 30-foot driveway, and the cast-iron waste line had to be sleeved after we found scale buildup from the hard water. We kept the ADU within the old garage footprint to avoid triggering county side-yard setbacks, and the project passed final inspection without a variance. That is the Citrus project in microcosm: the house looks simple, the underground work is where the money goes.
On larger Citrus acreage, the math changes. Septic and well setbacks from Los Angeles County health code can force the ADU to a different corner of the lot entirely. Long material hauls and equipment access across open ground add grading, compaction, and sometimes a gravel or paved approach. Outbuildings and shops converted to ADUs still need a compliant kitchen and bath, which means water supply, waste, and power to a structure that was never built for any of it. We scope all of it before quoting, because the quote means nothing if it was built on a walkthrough that ignored the ground under the building.
We Also Serve Cities Near Citrus
Fielding ADU West Covina serves the neighborhoods around Citrus, including West Covina, Diamond Bar, Covina, and Hacienda Heights. If you’re a few blocks outside the county line, call anyway. Our ADU Builders in Citrus work spans the area, and we’ll tell you whether your address falls under county or city rules.
Serving Citrus, CA - Our Local Coverage Area
We’re based in the Citrus 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 Builders in Citrus
Los Angeles County requires a 5-foot side yard setback and a 10-foot rear yard setback for new detached ADUs. If your Citrus garage already sits within those distances, converting it inside the existing footprint avoids the setback requirement entirely and skips the variance process. If you want to build beyond the garage footprint, the county may require a variance hearing, which adds time and cost. Call (559) 238-9583 and we’ll check your lot against the county’s current setback rules before you spend anything on plans.
Yes, but the county health department sets minimum distances between the septic tank, the leach field, and any new dwelling. If your proposed ADU location sits too close, you either relocate the ADU or pay for an engineered septic upgrade, which can add $20,000 to $40,000. We verify septic locations early in the scoping phase so the quote reflects the lot you actually own, not a hypothetical.
Most Citrus ADUs require a 200-amp service upgrade at the main panel because the existing 100-amp panels on 1950s to 1970s homes cannot carry a new dwelling’s load. The cost runs higher in Citrus because the main panel is typically inside the house while the ADU sits 30 to 60 feet away, meaning a trenched feeder across the driveway or yard. That trenching, plus the new panel and permits, usually adds $6,000 to $12,000 to the project.
Yes, prefab and modular ADUs from Abodu, Cover, Dvele, and similar platforms are permitted in Los Angeles County when they meet state and county building standards. The catch on Citrus acreage is site work: crane access, foundation and soil prep for expansive clay, and utility trenching all still apply. The unit price is only part of the total; the site work is where the Citrus-specific costs land.
If the outbuilding is already connected to an approved septic system or sewer line, and the county confirms the existing system can handle the added bedroom, kitchen, and bath load, you may avoid an upgrade. If the structure was never plumbed, you’re adding a new connection, and the septic setback rules apply. We pull the county records and do a site walk before quoting, so the number you approve reflects what the outbuilding actually needs.
Call Reed Calloway and the Fielding ADU West Covina team at (559) 238-9583 for a free, written estimate on your Citrus ADU. We’ll walk the lot, check the setbacks, the panel, and the waste line, and hand you a fixed price before any work starts. Every project is backed by The Garrison Standard for 365 days. If it is not done right, we come back and make it right at no charge.
Written by Reed Calloway, Owner at Fielding ADU West Covina, serving Citrus and the surrounding Los Angeles County area.
