A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Home Addition Contractor for Long Beach Homeowners
Adding square footage to a Long Beach home means making real decisions about your family’s daily life: where the kids will sleep while walls come down, how the dog stays safe around an open foundation, and whether the final bill will match the first quote. Seedling ADU Long Beach builds room additions, second stories, sunrooms, and garage additions with a written price before any work begins, so the number you approve is the number you pay. Our Long Beach Home Addition Contractor team handles every detail. Ben Ortega leads our Long Beach team, and every job is covered by the 365-Day Done Right Promise: if it’s not done right, we make it right. Call (562) 362-4592 and a live person answers, any hour, any day.
Sunroom Addition
A Sunroom Addition in Long Beach gives you a light-filled room that works as a playroom, reading nook, or breakfast space without the full cost of a conventional room addition. Coastal humidity and afternoon marine layer mean window flashing and sill waterproofing have to be done correctly the first time, which is exactly the kind of detail we handle every week in neighborhoods like Los Altos, Bixby Knolls, and Belmont Shore. A sunroom addition in Long Beach typically runs $22,000 to $55,000 depending on glazing choices, foundation work, and whether you want heating and cooling extended into the space.
Three-Season vs. Four-Season
Most Long Beach homes do well with a three-season sunroom, but if you want the room usable in December and January, we add insulation and a dedicated HVAC zone. We’ll show you the cost difference on paper before you decide.
Foundation and Glazing Choices
A sunroom on a slab costs less than one over a raised foundation, and single-pane windows cost far less than low-E double panes. We walk through the tradeoffs with you and write the price down before any materials are ordered.
Room Addition Contractor
A Room Addition Contractor in Long Beach handles the design, permitting, foundation, framing, and finish work for adding a new room to your existing home, whether that’s a family room, home office, or expanded living area. Following our Home Addition Contractor Maintenance Checklist for Long Beach Homeowners helps protect your investment long-term. In Long Beach, single-story room additions typically cost $180 to $320 per square foot depending on foundation conditions, roofline complexity, and finish level. We pull permits through the Long Beach Development Services department and schedule inspections the same week work is ready, so you’re never waiting on paperwork to keep the project moving.
Slab-on-Grade in Long Beach
Many Long Beach homes built in the 1940s through 1960s sit on raised foundations, which changes how we tie in new framing. We inspect the existing floor system first and match the new addition to what’s already there, rather than forcing a standard plan onto an older home.
Tying into Existing Rooflines
A room addition that follows your current roof slope looks like it’s always been there. We frame and flash the transition point carefully, and use matching roofing material so the seam doesn’t become a leak point after the first winter storm.
Second Story Addition Contractor
A Second Story Addition Contractor in Long Beach builds upward instead of outward, adding bedrooms or a primary suite above your existing footprint. This makes sense when your lot is too small to expand sideways, which is common in Long Beach neighborhoods like Bluff Park, Rose Park, and the Wrigley area where lots are narrow and setbacks are tight. A second story addition in Long Beach typically costs $220 to $400 per square foot because it requires structural reinforcement of the first floor, stair placement, and re-roofing. We handle the structural engineering and the construction under one written price.
Stair Placement and Flow
The stair location determines how much usable space you gain upstairs, and a poorly placed stair eats into both floors. We lay out at least two stair options in the design phase and walk you through how each one changes the flow of the home.
Living Through the Build
For many Long Beach families, living in the home during a second story addition is the biggest concern. The Cedarwell Care Promise applies every day: shoe covers and drop cloths inside, a photo of the clean-up before the crew leaves, and a live person on the phone 24/7 if you have a question at 7 p.m. on a Thursday.
Garage Addition Contractors
Garage Addition Contractors in Long Beach convert attached or detached garages into conditioned living space, or build a new garage with living space above it. We also serve nearby areas through Signal Hill Home Addition Contractor services. In Long Beach, a garage-to-bedroom conversion runs $45,000 to $90,000, while a new garage with a room above typically costs $140,000 to $220,000. We handle the slab inspection, electrical panel upgrade if needed, and the insulation and drywall work that turns a bare garage into a comfortable room.
Detached Garage Conversions
A detached garage in a Long Beach backyard gives you separation and quiet, but it also means a longer electrical run and new interior wall framing. We price the trenching and panel work up front so there’s no surprise electrician invoice mid-project.
Attached Garage Conversions
An attached garage converts faster and costs less per square foot because the structure already shares a wall with the house. The tradeoff is that you’ll give up parking, which matters on streets where permit parking is already tight.
Bathroom Addition Contractor
A Bathroom Addition Contractor in Long Beach adds a full or half bath where one doesn’t exist, solving the morning rush in a two-bedroom home or giving guests a place that isn’t the family bathroom. In Long Beach, a new full bathroom addition runs $18,000 to $38,000 depending on fixture grade, tile choices, and whether we’re adding plumbing to an exterior wall or an interior chase. We waterproof every shower pan and wet area to code, and we use pet-safe products where there’s a choice.
Plumbing Runs and Wall Openings
New bathrooms need a dedicated drain and vent stack, which sometimes means opening a wall in an adjacent room. We tell you exactly which walls get opened before work starts, and we protect the surrounding floors with drop cloths on every visit.
Ventilation and Moisture
Long Beach’s coastal air means bathrooms dry more slowly here than inland, so we size the exhaust fan to the room volume and run the duct to the exterior properly. Skipping this step leads to peeling paint and mold inside three years, and we’d rather do it right the first time.
Bedroom Addition Contractor
A Bedroom Addition Contractor in Long Beach adds a code-compliant sleeping room, which means egress window, closet, and proper smoke detector connectivity. A single bedroom addition in Long Beach typically costs $25,000 to $60,000 depending on whether the room is on an exterior wall, needs foundation work, or requires an upgraded electrical panel. We build the room to pass Long Beach inspection the first time, then hand you the final sign-off before the crew packs up.
Egress and Code Requirements
Long Beach requires a specific minimum window opening for any room used as a bedroom, and the window must be reachable without a ladder. We size the window and the well correctly during design so the inspector has nothing to flag.
Sound Separation
If the new bedroom sits next to a busy street or a shared wall with the kitchen, we add insulation between studs to keep noise down at night. It’s a small cost that makes a real difference for kids’ sleep schedules, and we include it in the written price.
Brands We Service
Seedling ADU Long Beach works hands-on with James Hardie fiber cement siding on many of our room additions and second stories because it holds up against Long Beach salt air better than wood lap siding. We order pre-cut trim and panel pieces to reduce on-site cutting, which keeps dust down inside the home during the finish phase.
For garage and ADU projects, we work with Abodu and Plant Prefab units, which arrive pre-built and get set on site in a fraction of the time of stick framing. That means less disruption to your yard and fewer days with a construction crew in your space. Whether your project uses James Hardie, Abodu, Plant Prefab, or any other quality material, we can help.
Signs You Need a Pro Right Now
- Cracked or sloping foundation in the area you want to build on. Long Beach sits on sandy soil and older homes settle unevenly. A pro can tell you whether the existing slab can take new weight or needs reinforcement before framing starts.
- Your electrical panel is full or older than 30 years. Adding a room usually means new circuits, and an overloaded panel is a fire risk. We check panel capacity during the estimate and include any upgrade in the written price.
- Water stains on interior walls near the proposed addition. Stains mean moisture is already getting in somewhere, and adding on without fixing the source traps the problem behind new drywall. A pro locates the leak first.
- Your lot slopes more than six inches across the building area. Sloped lots need stepped footings or retaining work, and guessing wrong leads to cracked walls within two years. We survey the grade before pricing.
- You’ve been quoted a square footage price without a site visit. A real contractor walks the property, checks the roof, the panel, the foundation, and the sewer line before writing a number. Anyone quoting sight unseen is guessing.
Our Process, Step by Step
- 1
Phone consultation and site visit. You call (562) 362-4592, a live person answers, and we schedule a walk-through at your Long Beach home. We look at the foundation, roof, panel, and site access, and we listen to what you actually need the room for.
- 2
Written proposal. Within a few days, you receive a written price covering design, permits, materials, labor, and clean-up. No allowances that balloon later, no change orders for things we should have caught during the site visit.
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Permit drawings and approval. We prepare the plans and submit them to Long Beach Development Services. We handle plan check comments and schedule inspections as the work progresses, so you never have to call the city yourself.
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Construction and daily care. Crews show up in uniform, background-checked, with shoe covers and drop cloths for every visit inside the home. We photograph the clean-up before we leave each day, and we’ll work around nap schedules and school hours where we can.
- 5
Final walk-through and sign-off. We walk the finished addition with you room by room, address anything you flag, and hand over your inspection sign-off card. Then the 365-Day Done Right Promise starts: if something isn’t right within the first year, we come back and make it right.
How Much Does a Home Addition Cost in Long Beach?
A typical single-story room addition in Long Beach runs $180 to $320 per square foot, a second story addition runs $220 to $400 per square foot, and a full bathroom addition runs $18,000 to $38,000. A sunroom addition runs $22,000 to $55,000, while a garage conversion runs $45,000 to $90,000 depending on what’s already inside the garage and whether you need a panel upgrade. Bedroom additions typically land between $25,000 and $60,000 for a code-compliant sleeping room with an egress window.
What moves the price up or down: foundation type (slab versus raised), roofline complexity, finish level (builder grade versus custom tile and millwork), and whether the project triggers an electrical panel upgrade or new sewer line connection. Older Long Beach homes with knob-and-tube wiring will cost more to bring up to code, and that’s not a corner to cut. How to avoid overpaying: get a written price that includes all permits, materials, labor, and clean-up, then compare it line item by line item. If a quote has a large “allowance” for finishes, ask what happens when the allowance runs out. Our free estimate includes a full walk-through of your home and a written price before you commit to anything. Call (562) 362-4592 and you’ll talk to a person, not a voicemail tree.
Our Service Area Near Long Beach
Seedling ADU Long Beach serves homeowners throughout Long Beach including Bixby Knolls, Los Altos, Belmont Shore, Bluff Park, Rose Park, and Wrigley, and we also work in Garden Grove, Carson, Norwalk, Cypress, Bell Gardens, Cudahy, West Carson, Santa Fe Springs, East Rancho Dominguez, West Athens, and Signal Hill. Building permits and setback rules vary in each city, so we always check local requirements before we write your proposal. If you’re in one of these cities and wondering whether your home can support the addition you have in mind, call us and we’ll tell you what we can see from a site visit.
Serving Long Beach, CA - Our Local Coverage Area
We’re based in the Long Beach area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
Frequently Asked Questions About Home Addition Contractor in Long Beach
A home addition contractor designs, permits, and builds new living space attached to your existing home, including room additions, second stories, sunrooms, and garage conversions. We also offer our Home Addition Contractor in Carson for projects just outside Long Beach. We handle the structural calculations, the Long Beach Development Services permit process, and the construction from foundation to finish trim. You get one written price for the whole project and one point of contact, Ben Ortega, throughout the build.
A single-story room addition typically takes 8 to 14 weeks once permits are approved, while a second story addition runs 4 to 6 months. The permitting process in Long Beach adds 3 to 8 weeks depending on plan check volume, and we submit plans the week you approve the proposal. The fastest way to shorten your timeline is to approve the written price quickly, because we order materials the day after you sign.
In Long Beach, home additions run $180 to $400 per square foot depending on whether you’re building a single story room, a second story, or a garage conversion. A bathroom addition runs $18,000 to $38,000, a sunroom $22,000 to $55,000, and a bedroom addition $25,000 to $60,000. Call (562) 362-4592 for a written price on your specific project, no obligation.
Yes, we pull every permit required for your project through Long Beach Development Services, and we schedule and attend every inspection. Working without a permit risks a stop-work order, fines, and problems when you sell the home later. The permit number and the final inspection sign-off are yours to keep after the project closes, and the 365-Day Done Right Promise only applies to permitted work done by our crew.
No, the price in your written proposal is the price you pay unless you ask us to change the scope of work yourself. If we discover something during construction that we should have seen during the site visit, that’s on us, not you. Change orders only happen when you decide you want an upgrade or an extra feature.
The 365-Day Done Right Promise covers every home addition, garage conversion, and ADU we build in Long Beach, in writing. If something is not done right within the first year, we come back and make it right at no charge. That includes things like drywall cracks from settlement, a sticking door, or a window that leaks during a winter storm.
You don’t need to move furniture out of every room, but we recommend clearing a three-foot path to the work area and moving valuables away from walls that will be opened. We bring shoe covers and drop cloths for every visit, and we photograph the clean-up before the crew leaves each day. Kids and pets should stay out of the work zone, and we’ll tell you which rooms are off-limits each morning before work starts. Call (562) 362-4592 for an exact quote, estimates are free.
Schedule Your Home Addition Contractor Service in Long Beach Today
If you’re ready to add a sunroom, bedroom, bathroom, or second story to your Long Beach home, call (562) 362-4592. You’ll reach a live person who can schedule your free site visit and written estimate, and you’ll have a real price in hand before any work begins. The crew shows up in uniform, protects your floors, and leaves your home clean at the end of every day. Backed by the 365-Day Done Right Promise, in writing.
Written by Ben Ortega, Owner at Seedling ADU Long Beach, serving Long Beach since our first ADU and home addition build in the city.
