Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
Before
After
Before
After
Before
AfterFast, Reliable Home Additions & ADU Across Maywood
Home additions and ADU construction in Maywood run anywhere from $45,000 for a modest garage conversion up to $220,000 for a fully detached new unit, and the single biggest variable isn’t lumber or drywall. It’s permitting. Maywood doesn’t run its own building department – the city contracts all plan review and inspections to Los Angeles County Building and Safety, a legacy of the 2010 fiscal crisis. That means every ADU permit in the 90270 ZIP moves through LA County’s regional office, with timelines and inspector jurisdictions that differ from what your neighbor in Bell or Huntington Park deals with. We’ve been pulling permits through that system long enough to know where projects stall and how to keep them moving. Call (877) 610-1318 and we’ll walk you through what your specific lot will require.
Why Barrett & Sons Construction Is Maywood’s Preferred Home Additions & ADU Company
Tom Barrett started this company in 1998, and his sons run the crews. That’s not a marketing line – the name on the truck is the name that answers the phone. When we bid a job in Maywood, Tom or one of his sons walks the site personally, and the person who shakes your hand is the person who’ll be on site when the backhoe shows up. Our Home Additions & ADU team has worked on enough tight lots in Maywood to know what a 30-foot-wide parcel actually means for material staging and neighbor relations.
Maywood’s housing stock is mostly small postwar bungalows and two-to-four-unit buildings from the 1940s through 1960s, sitting on 25-to-40-foot lots with almost no setback. That’s the reality we plan around. Permits get pulled, inspections get signed, and every change order arrives in writing before work proceeds. The 90-Day Done Right Promise is printed on every contract we write – if something isn’t right, Tom comes back and fixes it, one call.
Our Home Additions & ADU Services in Maywood
ADU Design & Permitting
Every ADU in Maywood moves through LA County Building and Safety, not a local counter. We prepare plans that anticipate what county reviewers actually flag – and what they don’t. Foundation details matter here because the LA Basin alluvial soils under Maywood carry liquefaction potential in a seismic event, and the county knows it. We design for it from day one so your plan set doesn’t bounce back for a geotechnical revision three weeks in. Design, permitting, and construction coordination all move under one roof.
Garage Conversion ADU
Converting an existing garage is usually the fastest path to rentable square footage in Maywood. On a 30-foot-wide lot near the city’s southwestern edge, we converted a detached garage into a 500-square-foot ADU for a family needing multigenerational space. Our crew staged materials in the driveway apron only after receiving written permission from the abutting property owner, and we scheduled rough-in inspections through LA County Building and Safety with two-week lead times. Shoring the load-bearing wall against the shared property line while maintaining dust control and a 7:30 a.m. start time kept neighbors cooperative through final sign-off. That’s how jobs on dense lots succeed – planning, not luck. Garage conversions in Maywood typically run $30,000 to $80,000 depending on foundation condition and utility runs.
New Detached ADU
Building detached means you’re working from the dirt up, and in Maywood that almost always means working within a few feet of at least one neighbor’s structure. We survey property lines, check for existing encroachments, and address drainage grading early – the flat, heavily paved landscape here has minimal permeable surface, so stormwater routing has to be engineered, not assumed. A new detached ADU in Maywood generally runs $90,000 to $220,000, with foundation work and utility trenching accounting for a meaningful share.
Junior ADU & Interior Conversion
Junior ADUs make sense on Maywood lots where there’s simply no room to add square footage outward. Converting an attached bedroom, enclosed porch, or underused interior space into a permitted JADU keeps you within the existing footprint – critical when the structure already sits close to the lot line. These projects move faster through LA County review because they usually involve fewer structural changes, but they still touch the same asbestos and lead-paint concerns common in 1940s-to-1960s Maywood homes. We coordinate abatement before any wall comes down.
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.
Trusted Brands We Service in Maywood
We install and stand behind products from manufacturers whose names you can look up. For Maywood projects we regularly specify Simonton windows where replacement glazing is part of an addition, and Ply Gem or PGT products where coastal-adjacent wind ratings or impact resistance matter. When trim, flashing, or a specific window sash fails during construction or within the warranty period, we’re close enough to Maywood to get parts ordered and swapped without stalling the job. No mystery brands off the back of a van. If we wouldn’t put it on Tom’s own house, we won’t put it on yours.
Common Home Additions & ADU Problems We See in Maywood Homes
- Assuming a Maywood permit can be pulled over the counter locally. It can’t. Everything runs through LA County’s regional office, and missing their required review timelines because someone assumed otherwise can stall a project by weeks. We factor county review windows into every schedule we give you.
- Underestimating staging constraints on sub-40-foot lots. There’s often nowhere to put a dumpster, a material drop, or a portable toilet without encroaching on a neighbor’s driveway or the public right-of-way. Unapproved placement triggers stop-work orders. We arrange written staging permissions before the first delivery.
- Skipping a party-wall survey or written notice before excavation near a shared wall. On Maywood’s dense parcels, shared walls and shared property lines are the norm, not the exception. Digging without notice leads to neighbor disputes, code complaints, and delays that could have been avoided with a $500 survey and a conversation.
- Discovering asbestos or lead paint mid-project. The 1940s-to-1960s housing stock throughout Maywood routinely contains asbestos in drywall, floor tile, and duct wrap, plus lead paint on original surfaces. We test before we open walls and coordinate abatement so you’re not hit with a surprise discovery change order.
Pricing for Home Additions & ADU in Maywood, CA
Here’s what we’re seeing for Home Additions & ADU in Maywood right now:
| Project Type | Typical Range |
|---|---|
| Home Addition | $45,000 - $130,000 |
| ADU Construction | $90,000 - $220,000 |
| Garage Conversion | $30,000 - $80,000 |
What moves the number most in Maywood is access. A detached ADU on a 35-foot lot with no alley side access means hand-carrying materials or crane work, and that labor shows up in the quote. Foundation scope matters too – the alluvial soil and liquefaction potential under this part of the LA Basin means some projects require deeper footings or retrofit work. We give you a written, line-item estimate before you sign, and every scope change arrives as a written change order before work proceeds. No surprises at the end. Call (877) 610-1318 for a free estimate on your specific lot.
We Also Serve Cities Near Maywood
Our crews work throughout southeast Los Angeles County, including Maywood and the surrounding communities of Bell, Cudahy, Commerce, and Huntington Park. If you’re just outside the 90270 ZIP and considering an ADU or addition, the same crew and the same 90-Day Done Right Promise applies.
Serving Maywood, CA - Our Local Coverage Area
We’re based in the Maywood 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 - Home Additions & ADU in Maywood
Plan on LA County Building and Safety’s review timelines, which typically run longer than cities that operate their own counters. Maywood contracts all building permits and inspections to the county – a result of the city’s 2010 fiscal collapse – so there’s no local desk to walk into. We submit early, anticipate reviewer comments, and schedule inspections with the county’s regional office rather than a city inspector. Most Maywood ADU projects clear permitting in 6 to 12 weeks depending on scope, and we budget that into your schedule before you sign. Call (877) 610-1318 and we’ll give you a realistic timeline for your specific project.
Yes, in most cases. A 30-foot-wide lot restricts your footprint and your setbacks, but detached ADUs are routinely permitted on Maywood parcels this size. The real constraint is access – how do crews, materials, and equipment reach the build site without trampling a neighbor’s property. We’ve completed detached work on lots this narrow using driveway-apron staging with written neighbor permission. Expect the design to be shaped by what LA County will approve within your side and rear setbacks. Call (877) 610-1318 and we’ll survey your lot before you draft plans.
We stage on the driveway apron or the street parking lane, and only after getting written permission from any abutting property owner and confirming right-of-way rules with the city and county. On the 500-square-foot garage conversion we completed near Maywood’s southwestern edge, all materials lived in the driveway apron on a schedule we’d agreed in writing with the neighbor. Nothing sits on a neighbor’s property without a signature. That’s a rule, not a courtesy. The staging plan is part of your written estimate so you can see exactly how the site will run.
If your project involves excavation, shoring, or structural work within a few feet of a shared wall or property line, you need a party-wall survey and written notice to the neighbor before work starts. Skipping this on a Maywood lot creates disputes and code complaints that stall the job – and it’s almost always avoidable. We handle the survey and the notice as part of the pre-construction scope. The cost is small compared to a stopped project. We’ll walk you through exactly what’s needed when we walk your lot.
Typical construction hours in Maywood run from 7:00 a.m. to 6:00 p.m. on weekdays, with more restrictive weekend rules depending on the scope and the county’s enforcement posture. We start crews at 7:30 a.m. on tight lots as a courtesy to neighbors – the extra half hour buys goodwill that pays off when a neighbor signs off on staging access. We post the work schedule on site and give adjacent property owners Tom’s direct number if something feels off. Call (877) 610-1318 and we’ll walk you through the work-hour rules that apply to your specific street.
Ready to talk about your project? Call Barrett & Sons Construction at (877) 610-1318 for a free, no-obligation estimate on your Maywood home addition or ADU. Tom or one of his sons will walk the site, write you a real number, and put the permit path in writing.
Written by Tom Barrett, Owner at Barrett & Sons Construction, serving Maywood and southeast Los Angeles County since 1998.