







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 El Segundo
Building an accessory dwelling unit in El Segundo means working within a 5.5-square-mile city that enforces a hard 35-foot height limit and runs one of the most thorough plan-check departments in the South Bay. That’s not a hurdle. It’s the reason you want a builder who has already pulled permits here and knows what clears on the first pass. Fielding ADU Builders handles detached backyard units, garage conversions, and room additions across El Segundo, from Smoky Hollow to the tree streets east of Sepulveda. Call (361) 315-4177 for a free, written estimate before any work begins.
Why Fielding ADU Builders Is El Segundo’s Preferred ADU Builders Company

We are an ADU Builders company that operates on The Garrison Standard: a written price before any work starts, permitted construction done by the book, and a one-year written guarantee on every project. Reed Calloway leads the team, and the same standard has anchored our parent organization, Garrison Partners, since 2006. For El Segundo homeowners, that means the number you approve on day one is the number on the final invoice. No change orders slipped in at rough framing. No permit board left blank.
Our crews arrive in uniform, background-checked before they step onto your property. We know what the El Segundo Building Safety Division asks for on ADU submittals, and we price utility work – panel upgrades, sewer laterals, gas line extensions – into the scope before you sign. Homeowners on ADU Builders in El Segundo projects get direct answers about height limits, setback variances, and plan-check timelines, because we have already worked through all three here.
Backyard ADU in El Segundo
A backyard ADU in El Segundo is a detached one-story unit – typically 400 to 800 square feet – built in the rear yard of a single-family lot. Most El Segundo lots run 4,500 to 6,000 square feet, which leaves enough room for a studio or one-bedroom unit without sacrificing the whole yard. A standard one-story backyard ADU here runs $275,000 to $410,000 before permit and utility fees. Two-story units are technically allowed under the 35-foot height limit but routinely trigger neighbor-notice and privacy review, which adds months to the permit calendar.
One-Story Design and the Height Limit
Because El Segundo caps structures at 35 feet and lots sit close together, a two-story ADU can block a neighbor’s sightline and stall at plan check. Most homeowners choose a single-story layout to keep the project in the standard over-the-counter path.
Utility Hookup and Lot Access
Older El Segundo homes – many built between 1940 and 1970 – often need a service panel upgrade or sewer lateral replacement before an ADU can be connected. We scope those costs in writing at the estimate, so they do not appear as a surprise change order later.
ADU Construction in El Segundo

ADU construction in El Segundo follows a specific sequence: as-built measurement, architectural and structural drawings, plan-check submittal, utility coordination, foundation and framing, mechanical and finish work, then final inspection. Our team handles every phase in-house, and the project lead you meet at the first walkthrough stays on the job through the final sign-off. A detached 600-square-foot unit typically takes 6 to 9 months from first walkthrough to final inspection in El Segundo, with plan-check review consuming 4 to 10 weeks of that timeline depending on the city’s current volume.
Permit Path and Inspections
El Segundo’s plan-check process reviews ADU submittals for setback compliance, height, parking replacement, and utility sizing. We pull all permits, schedule every inspection, and keep the permit board current. Reed Calloway signs off on the scope before submittal so the drawings match what is actually built.
Fixed Price, Written Scope
We hand you a line-item price in writing before any work starts. The Garrison Code governs how we operate on every El Segundo job: show up in the window, price in writing, build by the book, leave it clean, stand behind it for a full year. If something fails inside 365 days, we come back and correct it at no charge.
Trusted Brands We Service in El Segundo
El Segundo homeowners researching ADU options usually come across the same names we already work with. We install and finish prefab and modular ADUs from Abodu, Cover, and Dvele, and we also build conventional stick-framed units with James Hardie siding. If you want a factory-built unit shipped to your lot, we handle the site prep, foundation, utility connections, and finish work. If you want a custom build, we frame it to match your house. The right method depends on your budget, lot shape, and how fast you need occupancy. We carry no brand loyalty – we carry what fits the job.
Common ADU Builders Problems We See in El Segundo Homes
- Two-story ADU quoted without checking the 35-foot height limit. A second story can push the roofline over the limit or trigger neighbor-notice review. We red-flag this in the estimate, before you spend money on drawings that will stall.
- Plan-check delays that blow up the calendar. El Segundo’s plan-check is thorough. A submittal with missing details gets bounced and re-queued. We submit complete sets the first time and track the review weekly.
- Utility upgrades left out of the price. Panel, sewer lateral, and gas line work is common on El Segundo’s older housing stock. Unscoped contractors add it as a change order. We put it in the written price.
- Setback variance surprises on small lots. A detached ADU closer to the property line than the standard rule allows needs a variance – the city’s written permission to build closer. We check this before quoting so the price reflects the real plan.
Pricing for ADU Builders in El Segundo, CA
A detached one-story ADU in El Segundo runs $275,000 to $410,000 before permit and utility fees. A garage conversion lands between $120,000 and $200,000 depending on foundation condition and whether the existing slab needs structural work. A prefab ADU from Abodu or Cover typically runs $250,000 to $350,000 installed, including site work. What moves the number: lot access, utility upgrades, the plan-check path, and whether the design stays under the 35-foot height limit without a variance. Every Fielding quote is written and itemized. Call (361) 315-4177 to schedule a free estimate and get your number in writing.
We Also Serve Cities Near El Segundo
Fielding ADU Builders works across the South Bay and surrounding communities. We serve El Segundo plus Manhattan Beach, Hawthorne, Inglewood, and Hermosa Beach. If you live one block over the city line, the same crew, the same written price, and the same one-year guarantee apply.
Serving El Segundo, CA - Our Local Coverage Area
We’re based in the El Segundo 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 El Segundo
Yes, El Segundo allows a two-story ADU, but the structure must stay under the city’s 35-foot height limit and may require neighbor-notice and privacy review. Most homeowners choose a one-story design to avoid the extra plan-check time. Call (361) 315-4177 and we will tell you which path your lot qualifies for.
An ADU permit in El Segundo typically takes 4 to 10 weeks for plan-check review, depending on the city’s current workload. A complete, code-compliant submittal clears faster than one that gets bounced for corrections. We submit full sets the first time and track the review weekly so your calendar does not slip without explanation.
The cost of an ADU in El Segundo is driven by lot access, utility upgrades, foundation work, and whether the design needs a setback variance. A 600-square-foot one-story unit with a simple utility tie-in costs less than a unit that requires a panel upgrade, sewer lateral replacement, and a variance. Get an exact written quote at (361) 315-4177.
No, a separate address is optional for an El Segundo ADU, and a separate utility meter is only required if you want to bill tenants independently. Common practice is to run a subpanel from the main house and include utilities in the rent. We will confirm what the city needs for your specific setup during the estimate.
Yes, we build ADUs on small and irregularly shaped El Segundo lots, including lots under 5,000 square feet where the standard 4-foot side and rear setbacks leave limited buildable area. A one-story design with a compact footprint is the usual solution. Call (361) 315-4177 and we will measure your lot and tell you exactly what fits.
On a standard 5,000-square-foot lot off Eucalyptus Drive in the Smoky Hollow area, our crew pulled an old concrete driveway to pour a new footing for a 600-square-foot detached one-story ADU, then framed it with James Hardie cement siding to match the house. The homeowner had originally asked for a two-story layout, but our tech redlined it to a single story after confirming the 35-foot height limit and view issues, keeping it in the standard over-the-counter path. Final inspection cleared on the first pass.
Ready to get your El Segundo ADU scoped and priced in writing? Call (361) 315-4177. We answer live, 24 hours a day, 7 days a week, and the estimate is free.
Written by Reed Calloway, Owner at Fielding ADU Builders, serving El Segundo through the Garrison Partners family since 2006.



