Fast, Reliable Home Addition Contractor Across Maywood
A home addition in Maywood costs between $95,000 and $220,000 for most projects, with bathroom additions starting around $45,000 and bedroom additions typically running $70,000 to $140,000. We’re Seedling ADU Builders, and we work on the tight lots and alley-facing garages that define this city. If you’re planning a room addition, second story, or garage conversion on a 30-foot-wide lot, call (707) 383-5338. We’ll give you a written price before any work starts.

Why Seedling ADU Builders Is Maywood’s Preferred Home Addition Contractor Company
Maywood homeowners keep calling us back because we understand something most contractors don’t: this city permits through LA County, not city hall. That single fact changes timelines, paperwork, and plan-check feedback. Our crews know the LA County Department of Public Works portal, and we submit Maywood addition plans correctly the first time, so your project doesn’t stall in a county reviewer queue while a Bell or Huntington Park contractor figures out which website to use.
Every Seedling job in Maywood comes with a written price before tools arrive, the 365-Day Done Right Promise in writing, and the Cedarwell Care Promise on every visit: shoe covers, drop cloths, pet-safe products where there’s a choice, and a photo of the clean-up before the crew leaves. Ben Ortega, our owner, personally reviews Maywood project plans before submission. When a Maywood homeowner calls, a live person answers, not a voicemail tree.
Bathroom Addition Contractor in Maywood
A bathroom addition in Maywood typically runs $45,000 to $85,000, and the first question is almost never about tile. It’s about where the drain line can go on a 25-to-35-foot-wide lot with an 80-year-old foundation. Maywood’s 1920s to 1950s bungalows weren’t built with a spare bathroom in mind, so we usually tie into the existing sewer lateral at the rear of the house, where the alley gives us access without tearing up the front yard.
Working With Tight Side-Yard Clearances
Many Maywood homes have three to five feet of side-yard clearance. That means a bathroom addition often grows into the rear of the lot instead of the side. We design for that from day one, so your plans don’t come back from county plan check with a setback violation stamped across the first page.
Plumbing, Venting, and Neighborhood Noise
Adding a bath means cutting into the slab or running new DWV lines under the house. We coordinate with neighbors on shared walls before the hammering starts, and we stage pipe and fixtures in the alley rather than blocking the street. Maywood’s density means your neighbor is close. We treat that as a fact to design around, not a problem to ignore.
Bedroom Addition Contractor in Maywood
A bedroom addition in Maywood costs $70,000 to $140,000 for a ground-floor build, and the deciding factor is usually whether the lot can absorb the square footage without triggering a variance. Maywood’s housing stock leans heavily on wood-frame bungalows from the 1920s through 1950s. We’ve converted more than a few rear garages into primary suite additions, and nearly all of them needed a panel upgrade and a foundation assessment before framing could begin.
Growing Without Leaving the Lot
Families add bedrooms when a second child arrives, when an aging parent moves in, or when the house simply runs out of quiet corners. On Maywood’s narrow lots, the rear of the property is where the room usually goes. We survey the alley access, check the existing detached garage slab, and tell you in writing whether that 1940s foundation can carry a bedroom or needs new footings.
Quiet Work Near Kids and Pets
If the addition connects to a child’s room or shares a wall with a neighbor’s nursery, we plan the loudest cuts for mid-morning and use quiet tools where the job allows. The Cedarwell Care Promise means drop cloths inside the house and a clean-up photo before we leave each day. Your kids’ sleep schedule matters, and our crews work like it.
Trusted Brands We Service in Maywood
We work with the prefab and modular brands serious ADU buyers research before calling anyone: Cover, Dvele, and Boxabl. For Maywood homeowners converting an alley-facing garage into a bedroom and bathroom addition, a Cover or Dvele prefab unit can shorten on-site framing time, which matters when your lot has no staging room and every day of alley parking is a conversation with a neighbor. We stock the connection materials and finishing components those systems need, so you’re not waiting on a factory shipment while your addition sits half-done.

Common Home Addition Contractor Problems We See in Maywood Homes
- Permits filed through the wrong jurisdiction. Contractors who work Bell or Huntington Park often assume Maywood runs its own Building and Safety. It doesn’t. We submit through the LA County Department of Public Works portal from day one, so your plans land in the right queue the first time.
- Setback violations on 30-foot lots. A design that works on a 50-foot lot will fail plan check here. We measure side-yard clearances before we draw, so the county reviewer doesn’t kick your plans back for a footprint that simply can’t fit.
- Street staging that draws code-enforcement attention. Maywood’s streets are tight, and leaving materials on the sidewalk blocks neighbors and invites complaints. We stage from the rear alley wherever possible and keep the street clear. It’s slower to move materials, but it keeps the project moving.
- Age-related surprises in 1940s garages. A rear garage conversion often hides undersized electrical panels, cracked foundation footings, and old knob-and-tube wiring. We inspect those early, quote them in writing, and don’t let a “surprise” line item appear after crews arrive.
Pricing for Home Addition Contractor in Maywood, CA
Here’s what Maywood homeowners can expect to budget:
- Bathroom addition: $45,000 – $85,000
- Bedroom addition (ground floor): $70,000 – $140,000
- Second story addition: $150,000 – $280,000
- Sunroom addition: $50,000 – $110,000
- Garage conversion to living space: $80,000 – $180,000
- Bump-out addition: $40,000 – $90,000
What moves the number: foundation work on a 1940s slab, sewer line distance, panel upgrade requirements, and whether the rear alley gives us enough access for equipment. Every Maywood project gets a written price before work starts, with no line items added after crews show up. Call (707) 383-5338 for a free estimate, and we’ll walk the lot with you.
We Also Serve Cities Near Maywood
Our crews work throughout the Gateway Cities. Along with Maywood, we serve Bell, Huntington Park, Bell Gardens, and South Gate. The permitting difference matters in every one of these cities, and our team knows which jurisdiction handles your plans before we knock on your door. See our Home Addition Contractor page for the full scope of what we build.
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 About Home Addition Contractor in Maywood
Maywood’s building and safety services are contracted to LA County, so plans go through the county portal instead of a local city hall. County plan-check fees and reviewer queues apply, which can add two to four weeks compared to Bell or Huntington Park, where city hall handles permitting in-house. We factor that timeline into your schedule from the first meeting, and we file through the correct portal so the wait is the county’s, not a refiling delay. Call (707) 383-5338 and we’ll map out a realistic permit timeline for your specific lot.
Yes. Most Maywood additions on lots this width are designed to grow toward the rear of the property, not the side. We work within the city’s setback requirements and use the alley for access and staging, which keeps the street clear and the neighbors on side. On a 30-foot-wide lot off Slauson Avenue, we converted a 1940s detached garage into a bedroom and bathroom by staging materials in the alley and coordinating with the abutting neighbor before framing started. The project closed without a single neighbor complaint. Call (707) 383-5338 and we’ll measure your lot before we draw anything.
Yes, and we do it for you. When your addition touches a party wall or comes within a few feet of a neighbor’s property line, we contact that neighbor before framing begins. It takes a conversation, not a permit, but it prevents the kind of friction that can stall a job. Maywood’s lots are close, and a neighbor who understands the schedule is a neighbor who doesn’t file a complaint. Call (707) 383-5338 and we’ll handle that notification as part of your written project plan.
Expect a foundation assessment, an electrical panel upgrade, and possibly new footings. Maywood’s rear garages from that era were built for cars, not bedrooms, and the slab often doesn’t meet current living-space standards. We inspect that early, price it in writing, and don’t surprise you with a foundation line item after the project starts. If the shell is sound, we can often convert it faster using prefab systems from Cover or Dvele, which shortens on-site framing time on a tight lot. Call (707) 383-5338 for a garage assessment and a written quote.
Alley access usually lowers the price. When we can stage materials and equipment in the rear alley, we don’t need street permits, don’t block neighbors, and don’t waste crew time hauling materials through the house. Rear-alley access is standard for Maywood’s 1920s-to-1950s bungalow lots, and we design our work sequence around it. If your lot has no alley access, the estimate adjusts for street staging and walk-back hauling. Call (707) 383-5338 and we’ll price both scenarios in writing before you commit to anything.
Get a Written Price for Your Maywood Home Addition
If you’re planning a home addition in Maywood, start with a walkthrough. We’ll measure the lot, check the alley access, look at the garage foundation, and tell you what a bedroom or bathroom addition will cost before any work begins. Every Seedling project comes with the 365-Day Done Right Promise and the Cedarwell Care Promise: shoe covers, drop cloths, pet-safe products, and a clean-up photo before we leave each day. Call (707) 383-5338 to schedule your free estimate.
Written by Ben Ortega, Owner at Seedling ADU Builders.