A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateTrusted Room Addition Contractor for Long Beach Homeowners
Adding square footage to a Long Beach home is the fastest way to get more living space without packing up and moving. The problem most homeowners run into is a contractor who gives a rough verbal number, disappears for three weeks, then returns with a change order that’s double the original quote. Benson ADU Long Beach does it differently. Led by Troy Eastman, our team puts a written price in front of you before any work starts, so you know exactly what the room addition costs from day one. Call (562) 362-3885 and you’ll get a live person, not a voicemail maze.
Sunroom Builders
Sunroom Builders specialize in glass-heavy additions that flood a home with natural light while adding usable living space for most of the year. In Long Beach’s coastal climate, a sunroom makes sense as a reading nook, plant room, or breakfast space, and it typically costs less per square foot than a fully insulated stick-built addition. Benson ADU Long Beach works with a Long Beach Room Addition Contractor to design and build sunrooms as part of our broader room addition service, with written pricing before the first board is cut.
Prefab Sunroom Panels
We build with panelized systems from brands like Tuff Shed, which means fewer days of open framing on your property and a tighter construction window. The panels arrive pre-measured and pre-cut, reducing material waste and keeping the job site cleaner.
Glazing and Thermal Comfort
Long Beach afternoons can push a poorly glazed sunroom past 90 degrees by 2 PM. We spec low-E glass and adequate ventilation on every sunroom to keep the space comfortable without running your AC bill through the roof.
Room Additions
Room Additions are ground-up expansions of your home’s footprint: a new bedroom, a larger kitchen, a second living area, or a dedicated home office built onto the existing structure. Long Beach lots range from compact Belmont Shore parcels to wider Rancho Estates properties, and the addition needs to respect setbacks and floor-area-ratio limits on every one of them. For nearby areas, a Signal Hill Room Addition Contractor can address similar zoning requirements. Benson ADU Long Beach handles the design, permits, and build, and you get a written price before anything is signed.
Site-Built vs. Prefab Approach
Some additions are best framed on site, especially when matching an older home’s roofline. Others come together faster with prefab wall and floor panels from Plant Prefab, which we’re authorized to source and install.
Matching Existing Architecture
The best room addition in Long Beach looks like it was always there. That means matching stucco texture, roof pitch, window style, and trim details, not just bolting a box onto the side of the house. Troy Eastman’s team has been doing exactly that since 2006.
Modular Home Addition
Modular Home Addition construction brings factory-built modules to your Long Beach property and assembles them on a prepared foundation, usually in a fraction of the time a fully site-built addition takes. This approach works well for whole-room additions, upstairs pop-outs, and accessory structures where you want factory precision and better cost certainty. Benson ADU Long Beach sources modular components from brands including Plant Prefab and Boxabl, and we handle every step from foundation to finish. If you’re near the coast, our Room Addition Contractor in Seal Beach offers the same end-to-end service.
Factory Quality Control
Modules are built indoors under controlled conditions, which means framing stays dry, cuts are precise, and inspections happen at the factory before the unit ever ships. That translates to fewer surprises on your job site.
Crane and Site Logistics
Most Long Beach neighborhoods have tight access lanes and overhead utility clearance issues. We survey the site, confirm truck and crane access, and coordinate with the city before scheduling any module delivery. If your lot can’t accommodate a full module, we’ll tell you upfront and recommend a site-built or panelized alternative.
Home Addition Plans
Home Addition Plans are the stamped architectural drawings required before any room addition gets a building permit in Long Beach. Without them, nothing happens: no foundation, no framing, no final inspection. Benson ADU Long Beach produces complete plan sets – floor plan, elevations, structural details, window and door schedules – as part of every project, and the drawings are included in your written quote.
From Rough Sketch to Stamped Set
We start with a walking conversation about how you actually use your space. Then we draft, revise with you, and submit for approval. By the time permits are issued, you’ve already approved every room dimension and wall placement in writing.
Prefab Plan Compatibility
If you’re leaning toward a prefab or modular addition, the plans must reflect the manufacturer’s engineering data for the specific brand we’re using, whether that’s Abodu, Plant Prefab, or Boxabl. We coordinate directly with the factory engineering team so the plan set doesn’t require a do-over at plan check.
In Law Suite Builders
In Law Suite Builders create self-contained living quarters attached to or near the main house, designed for an aging parent, adult child, or long-term guest who wants independence without leaving the property. A proper in-law suite includes its own entrance, a kitchenette or full kitchen, a bathroom, and usually a sitting area. Benson ADU Long Beach designs and builds in-law suites that comply with California’s ADU standards, and the price is locked in writing before work begins.
Privacy and Separate Access
The defining feature of any in-law suite is a private entrance. We orient suites to face a side yard or rear garden so occupants come and go without walking through the main house, and we can add sound-rated wall assemblies so two households share one property without sharing every conversation.
Universal Design Basics
We recommend wider door openings, zero-threshold showers, and lever handles as standard on in-law suites, whether or not the occupant currently uses a mobility aid. It costs a small amount during construction and saves a costly retrofit later.
ADU Conversion
ADU Conversion turns existing square footage – a garage, a basement, a pool house, or an oversized utility room – into a legal, rentable dwelling unit with its own address and utilities. In Long Beach, garage conversions are the most common path because the structure already has a slab, walls, and a roof. Benson ADU Long Beach converts garages and other existing structures into full ADUs with permits pulled and inspections passed.
Garage-to-ADU Conversions
A typical detached two-car garage in Long Beach converts into a 400 to 500 square foot one-bedroom ADU. We handle removing or replacing the garage door, upgrading the slab for living space, running new electrical and plumbing, and finishing the interior to match the main house.
JADU Considerations
A JADU – junior accessory dwelling unit – is a conversion within the footprint of the existing house, capped at 500 square feet. It can share the main home’s sewer line and water service, which trims costs, but it cannot be rented separately if the owner doesn’t live on site. We’ll walk you through which conversion path makes financial sense for your specific Long Beach property.
Brands We Service
We’re authorized to build with Plant Prefab, a California company whose panelized and modular systems are engineered for seismic zones like ours. Their wall panels arrive with windows pre-installed and wiring chases pre-cut, which cuts on-site framing time significantly. We also work with Abodu, whose pre-approved ADU designs can compress the permitting timeline on qualifying Long Beach lots. And for sunrooms, offices, and backyard structures, Tuff Shed’s Prestige line gives us a durable steel-reinforced frame to build from. If you already have a brand preference, bring it up on the call – if it’s one of these, Troy Eastman’s team can build it. If it’s not, we’ll be straight with you about what will and won’t work on your site.
Whether you have a James Hardie clad addition in mind, a prefab unit from Abodu, or any other make or system, we can help.
Signs You Need a Pro Right Now
- Your family has outgrown the floor plan. Kids sharing a room, a home office squeezed into a hallway, or a dining table that seats four when you are six. These are structural problems that furniture rearranging won’t fix.
- You’ve been told your lot can’t support an addition. Many Long Beach lots have odd shapes or modest setbacks. A contractor who regularly works with the city’s planning department may see options a handyman won’t.
- You’re renting out space informally. An unpermitted garage apartment or converted room creates liability and insurance risk. A legal ADU conversion fixes that and adds resale value.
- You got a verbal estimate that seems too good to be true. It usually is. Written pricing, line-item allowances, and a signed scope of work are the only things that protect you when the project starts.
- An aging parent needs to move closer. Caregiving from across town wears everyone down. An in-law suite on your property gives them independence and you proximity – and it’s cheaper than assisted living in LA County.
Our Process, Step by Step
- 1
The first call. You call (562) 362-3885 and speak to a live person at Benson ADU Long Beach. We ask about your property, your goals, and your rough budget. You get a ballpark range on that first call, in writing via email if you want it.
- 2
Site walk and feasibility. Troy Eastman or a senior project manager visits the property, measures the existing structure, checks access, and reviews utility locations. We also check Long Beach zoning and setback requirements so there are no surprises later.
- 3
Written proposal with plans. You receive a written price, a scope of work, and preliminary drawings. This is not an estimate – it is the number we will build to unless you change the scope. Every allowance is spelled out.
- 4
Permits and scheduling. We prepare and submit the plan set, manage plan check, and pull permits. Once the permit is issued, we give you a start date and a live tracking link so you can follow progress from your phone.
- 5
Build, inspect, and finish. Our uniformed, background-checked crews complete the work with inspections at every required stage. Before final payment, we walk the addition with you, fix anything on the punch list, and hand over your written 365-Day Done Right Promise.
How Much Does Room Addition Contractor Cost in Long Beach?
A room addition in Long Beach generally runs $250 to $450 per square foot for site-built work, depending on finish level, foundation type, and whether the addition includes a bathroom or kitchen. A simple 200 square foot bedroom addition usually lands between $50,000 and $90,000. A 400 to 500 square foot garage ADU conversion typically falls between $120,000 and $180,000. Sunrooms run lower – roughly $150 to $300 per square foot in our market – because they carry less insulation and mechanical work. In-law suites with a full kitchen and bath usually start around $100,000 and climb from there.
What moves the price: whether you’re on a raised foundation or slab, how close the addition sits to your existing electrical panel, the finish level you choose, and whether the city requires any drainage or sewer upgrades. What should not move the price once work starts: anything covered in your written scope. Benson ADU Long Beach includes architectural plans, permits, and project management in your quoted number. No change orders appear unless you ask for a change. A free estimate from us means a written number you can actually budget against – call (562) 362-3885 and you’ll have it in hand.
Our Service Area Near Long Beach
Benson ADU Long Beach serves homeowners throughout Long Beach and nearby communities including Lakewood, Signal Hill, Seal Beach, Cerritos, Artesia, La Mirada, Bell, La Palma, and West Rancho Dominguez. Most site visits within this area happen within a few business days of your call. If you’re weighing options, take a look at our home page for a broader overview, or compare notes on our Room Addition Contractor in Downey and Room Addition Contractor in Buena Park pages. We’re also the team behind Room Addition Contractor in Long Beach – this page you’re reading right now.
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 Room Addition Contractor in Long Beach
A room addition contractor is a licensed builder who manages the design, permitting, and construction of new square footage added to an existing home. The job includes foundation work, framing, roofing, electrical, plumbing, and finish work, all coordinated with local building inspections. Benson ADU Long Beach does this as a single point of contact so you’re not juggling four subcontractors yourself. Call (562) 362-3885 and we’ll explain exactly how your specific addition would come together.
Most room additions in Long Beach take 3 to 6 months from contract signing to final inspection, with permits taking 4 to 10 weeks of that timeline. Prefab and modular components can compress the construction phase, sometimes cutting a month or more off site-built framing time. The city’s plan check workload is the biggest variable. We’ll give you a realistic schedule in writing once your plans are submitted, not before.
Expect to pay $250 to $450 per square foot for a site-built room addition in Long Beach, with simpler bedroom additions starting around $50,000 and full in-law suites running $100,000 to $200,000 depending on size and finishes. Factors that move the number include foundation conditions, fixture selections, and permit requirements. Benson ADU Long Beach gives you a written price before any work starts – call (562) 362-3885 for your exact quote.
Yes. We’re authorized to build with Plant Prefab, Abodu, and Tuff Shed, all of which are brands we regularly spec for room additions, ADUs, and backyard structures. Each brand has specific engineering and foundation requirements we’re familiar with, so we can coordinate directly with the factory. If your project fits one of their systems, we’ll tell you on the first call.
Room additions are planned construction, not emergency work, so we don’t offer same-day starts. What we do offer is a written quote with a defined start date once permits clear, so your project doesn’t languish. If you have a pressing need like a family member moving in, mention it on the call and we’ll prioritize your plan set where the city allows it.
Every project carries our 365-Day Done Right Promise: if any covered work isn’t right within a full year, we make it right at no charge. That promise is written into your contract, not delivered verbally. It covers workmanship and materials installed by our crews. We also provide a free second visit if any covered repair fails within the warranty period, and our workmanship warranty is backed by the Relay Home Co. family, founded in 2006.
Start by clarifying what you want the space to do: house a family member, generate rent, create a workspace, or add resale value. Then gather your property’s parcel number, any past plans or surveys, and your target budget range. Call (562) 362-3885 for a free estimate – we’ll take it from there and you’ll have a written price before any commitment is required.
Schedule Your Room Addition Contractor Service in Long Beach Today
Ready to get a written price instead of another verbal ballpark? Call Benson ADU Long Beach at (562) 362-3885 for a free, no-obligation estimate. A live person answers around the clock, every day of the year. You’ll get straight answers, a clear plan, and a price in writing before any work starts.
Written by Troy Eastman, Owner at Benson ADU Long Beach, serving Long Beach since 2006.
