Free written scope consultation - allowances, timeline, and change-order rules on paper before a single trade is scheduled
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AfterFast, Reliable Home Additions & ADU Across Maywood
A home addition or ADU in Maywood typically runs $45,000-$130,000, with garage conversions starting around $30,000 and full detached ADUs reaching $220,000. Most projects take 4-8 months from permit to final inspection, though Maywood’s unique permitting path through LA County DPW can add weeks to the front end. Call (424) 567-7009 to schedule your free estimate.
We serve Maywood from our Los Angeles office, with crews running daily to the 90270 zip and surrounding blocks. Maywood’s density - 27,000 people in 1.1 square miles - means we’ve learned to work in tight lots, zero-lot-line conditions, and the small wood-frame bungalows that dominate the housing stock here. Our Home Additions & ADU team has handled the LA County DPW permit workflow enough times to know where the delays hide.
Why Rowan Construction Group Long Beach Is Maywood’s Preferred Home Additions & ADU Company
We’ve delivered over 4,000 projects since 2007, every one with a written price before work started and a documented photo record when the crew left. In Maywood specifically, that discipline matters more than usual - the city’s contracted building-and-safety functions to LA County since 2010, and many contractors who work Bell Gardens or Downey aren’t set up for the county permit path.
Our 365-Day Done Right Promise applies here like everywhere else: if it is not done right, Rowan makes it right, backed by The Haven Standard, not a handshake. Under Clause 1, the price is written before anyone starts. No change proceeds without a signed change order, which is why our projects finish within a few percent of the agreed number.
Background-checked, uniformed technicians. A live person answering calls 24/7. And a Free Second Opinion on any written estimate - bring a competitor’s quote and we’ll review it line by line at no charge.
Grant Rowan has built the company’s reputation on documentation, not enthusiasm. Customers in Maywood get the same.
Our Home Additions & ADU Services in Maywood
Garage Conversion ADU
This is the most requested ADU type in Maywood, and the most complicated. The city’s high proportion of already-converted garages - many done decades ago without permits - means we almost always start with a records search through LA County DPW. On a garage conversion ADU near the 4700 block of Maywood Avenue, our crew opened the old converted garage and found single-wall framing and a stem-wall foundation with almost no anchor bolts - the structure was never permitted. Before we could pull a single new permit through LA County DPW, we had to run a records search, then legalize or demo the existing structure, and only then started framing the ADU with a shear-wall retrofit and stainless fasteners on the new roof deck, since the salt-laden air off the coast eats plain steel within a few years. Typical range in Maywood: $30,000-$80,000.
New Detached ADU
Detached ADUs in Maywood fight for every square foot. Lot coverage maximums on 4,000-square-foot parcels leave little margin, and setback limits are tighter than in neighboring Downey or Whittier. We design to the inch, specifying coastal-grade hardware even on inland sites - the salt air reaches Maywood, and the summer heat in the low-to-mid 90s°F accelerates corrosion once it starts. Shear-wall compliance and foundation retrofitting are standard scope, not optional, given the active fault systems in the Southeast LA basin. Typical range: $90,000-$220,000.
Room Additions
Room additions on Maywood’s 1920s-1950s bungalows routinely uncover knob-and-tube or early Romex wiring, single-wall framing, and stem-wall foundations with minimal anchor bolts. We price for discovery, not hope. The written scope includes a contingency line for seismic retrofitting, and the change-order process - signed before any additional work proceeds - keeps the final number transparent. Typical range: $45,000-$130,000.
Junior ADU & Interior Conversion
Junior ADUs work in Maywood when the existing structure has enough square footage and separate entrance potential. We assess the foundation, the electrical panel capacity, and the sewer lateral - all common bottlenecks in pre-1950s stock - before quoting. The price is flat, written, and includes the LA County DPW permit fees we can predict.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Before
AfterTrusted Brands We Service in Maywood
We source across fifty-plus vetted brands, giving the written quote honest numbers rather than inflated ones. For Maywood’s climate conditions - salt air, summer heat, seismic exposure - we frequently specify Atlas roofing components for their corrosion resistance, Tamko underlayments rated for extended UV exposure during county permit delays, and Boral siding products that handle thermal cycling without the maintenance burden of untreated wood. PGT windows come up on coastal-exposed elevations where we want laminated glass and marine-grade hardware. We stock local inventory for these brands, so material lead times don’t extend a project already waiting on LA County DPW.
Common Home Additions & ADU Problems We See in Maywood Homes
- Unpermitted prior conversions discovered mid-scope. A homeowner requests a room addition or ADU, and we find the existing “garage” was converted in the 1980s without permits. The first billable phase becomes a records search with LA County DPW and a legalization or demo plan before new permitted work can proceed.
- Foundation and framing that predate modern seismic standards. Single-wall framing and stem-wall foundations with minimal anchor bolts on 1920s-1950s bungalows mean any addition needs a shear-wall and anchor-bolt retrofit, not just new framing. We price this into the initial scope, not as a surprise.
- Coastal-spec hardware skipped to save money. Plain steel fasteners, untreated fence posts, and non-marine-grade railings on Maywood additions fail within a decade from salt air, even though the summer heat hides the corrosion until it’s structural. We specify stainless or hot-dip hardware and document it in the photo record.
- Electrical and sewer capacity from another era. Knob-and-tube or early Romex wiring, plus undersized sewer laterals, are common in Maywood’s housing stock. We assess these before quoting, because upgrading a 100-amp panel or replacing a sewer lateral is not a change order - it’s part of making the addition legal and functional.
Pricing for Home Additions & ADU in Maywood, CA
Here’s what a typical project runs in Maywood’s market:
| Project Type | Price Range |
|---|---|
| Home Addition | $45,000-$130,000 |
| ADU Construction | $90,000-$220,000 |
| Garage Conversion | $30,000-$80,000 |
What moves the number: the condition of the existing structure (unpermitted conversions add a legalization phase), the need for seismic retrofitting, material spec (coastal-grade hardware costs more upfront, plain steel costs more later), and the LA County DPW permit timeline. We deliver a flat written price with a written scope before any work starts - every time. Call (424) 567-7009 for your free estimate.
We Also Serve Cities Near Maywood
Our crews work throughout Southeast LA, including Home Additions & ADU in Maywood and neighboring Bell Gardens, Downey, Pico Rivera, and Whittier. Each city has its own permit desk or county workflow, and we maintain the relationships to navigate them without delay.
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
Yes, but the unpermitted conversion must be legalized or demolished before LA County DPW will issue new permits for the ADU. We start with a records search to determine what exists in county files, then build a legalization or demo plan into the project scope. Call (424) 567-7009 and we’ll assess your specific situation at no charge - estimates are free.
Three factors: the LA County DPW permit workflow adds administrative time; the high probability of unpermitted existing structures triggers a legalization phase; and the pre-1950s housing stock routinely needs seismic retrofitting, electrical upgrades, and foundation work that newer cities don’t require. The written quote includes these items so the final number stays within a few percent of the agreed price. Call (424) 567-7009 for a line-item estimate.
Yes. Maywood sits close enough to the coast that salt-laden air reaches the city, and the summer heat in the low-to-mid 90s°F accelerates corrosion once it starts. We specify stainless or hot-dip fasteners, marine-grade hardware on exposed railings, and sealed joints on decking - not because it looks better on a spec sheet, but because we’ve replaced plain steel that failed within eight years on jobs where the previous contractor cut that corner. The price gap between coastal-spec and inland-spec is typically 8-15% on hardware and finishes, and it shows up in the written quote as a line item you can see.
All permits run through LA County DPW, not a local city desk, since Maywood contracted out building and safety in 2010. Required permits typically include building, electrical, plumbing, and mechanical - and if the existing garage conversion was never permitted, a legalization or demolition permit precedes them. We handle the submittal, the corrections, and the inspection scheduling as part of our standard scope. Call (424) 567-7009 to start the records search.
From signed contract to final inspection, typically 4-8 months. The LA County DPW permit phase adds 4-8 weeks compared to cities with their own planning desks, and unpermitted existing structures can extend that by several weeks for legalization. We build this timeline into the written schedule, with milestones you can track. Call (424) 567-7009 for a project-specific timeline - estimates are free.
Written by Grant Rowan, Owner at Rowan Construction Group, serving Maywood since 2007.