A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Hayward, CA
An ADU (accessory dwelling unit) is a second, smaller home built on the same lot as your main house, and in Hayward it’s become the most practical way to add living space without buying a new property. Most Hayward lots have the room, and the city’s stock of 1950s-1970s ranch homes sits on large, flat parcels that are genuinely well-suited to detached units. What makes Hayward jobs different is what’s under the surface: older electrical panels, original foundations, and the Hayward Fault running close enough that seismic retrofit requirements shape nearly every build. If you’re weighing an ADU, a garage conversion, or a home addition, call us at (707) 760-0502. We’ll give you a written price before any work starts.
Why Hayward Homes Are Different
Hayward’s housing stock is dominated by single-story ranch and bungalow homes built between the 1950s and 1970s. That’s good news for ADUs in one important way: the lots tend to be wide and flat, so a detached unit in the backyard usually has a sensible place to go. What we find on nearly every older Hayward property is a wood-frame structure over a crawl space, which simplifies some parts of the build. The complications tend to come from the age of the systems. Many homes still run on original 100-amp electrical panels, and an ADU with a kitchen, laundry, and mini-split heating typically means a panel upgrade before the unit can pass inspection.
The climate shapes material choices here more than most homeowners expect. Hayward gets cool, foggy summers and mild, wet winters, so insulation and moisture management aren’t optional extras. We spec wall assemblies and ventilation for the marine layer as much as for the occasional heat spike. And because the Hayward Fault is close, the city’s design standards treat seismic performance as a first-order concern, not a checkbox. A detached ADU here may need reinforced foundation details and specific strapping that a builder in, say, the Central Valley would never have to think about. Russ Delmar walks every Hayward homeowner through what their lot actually requires before we quote anything.
Our Main Hayward Services
These are the three jobs Hayward homeowners call us about most. Each has its own page with pricing, timelines, and the specific Hayward conditions that affect that type of project.
Home Addition Contractor in Hayward
A home addition in Hayward usually means extending a ranch home outward, or converting part of an existing footprint into a larger, more useful room. The work ties into the original home’s roofline, foundation, and electrical system, so the age of the house shapes the scope. We often find original 1950s framing that’s still solid but needs selective reinforcement to meet current seismic code, and crawl-space access makes foundation work more straightforward than it is on slab construction. If you’re thinking about adding a primary suite, a family room, or a larger kitchen, the details are on our Home Addition Contractor in Hayward page.
Garage Conversion Contractor in Hayward
Hayward has a lot of original detached garages from the 1950s sitting at the back of deep lots, and many of them are stronger candidates for conversion than people realize. The catch is what we find once we open the walls: obsolete knob-and-tube wiring, unpermitted add-ons from previous owners, and slab floors that were never meant to hold living space. A garage conversion in Hayward means bringing the building up to current residential code, which can include insulating, replacing the electrical, and sometimes reinforcing the slab. That work is all covered on our Garage Conversion Contractor in Hayward page.
ADU Builders in Hayward
Detached ADUs are the fastest-growing request we get from Hayward homeowners. The city’s large, flat lots and mid-century lot lines create genuinely good conditions for a backyard unit, but Hayward’s design standards and seismic requirements have to be engineered into the job from day one. We’ve built units using Plant Prefab and Abodu systems, matched to the lot, budget, and whether the homeowner wants a fast prefab timeline or a fully custom build. The full breakdown of costs, permitting realities, and what’s buildable on your specific parcel is on our ADU Builders in Hayward page.
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.
Brands We Service in Hayward
We work with established ADU manufacturers and materials suppliers including Plant Prefab, Abodu, Tuff Shed, and James Hardie. The right brand for a Hayward lot depends on access for delivery, the foundation approach, and how much of the finish you want handled off-site. See our brands for more on what we recommend and why.
Pricing for ADU Company in Hayward, CA
| Service | Typical range in Hayward |
|---|---|
| Detached ADU (full build) | $180,000 – $285,000 |
| Prefab ADU (installed) | $145,000 – $230,000 |
| Garage conversion to ADU | $95,000 – $165,000 |
| Home addition (primary suite) | $120,000 – $190,000 |
| Home addition (family room) | $95,000 – $155,000 |
| Home addition (kitchen expansion) | $80,000 – $140,000 |
| Electrical panel upgrade (100A to 200A) | $3,500 – $6,500 |
| Foundation reinforcement for ADU | $12,000 – $28,000 |
| Site prep and utility trenching | $8,000 – $18,000 |
Prices in Hayward push higher when the lot needs significant grading, when the existing panel is undersized, or when the city’s seismic retrofit requirements trigger additional foundation engineering. Whatever the number ends up being, you’ll see it in writing before we start, and that written price does not change at the door. Call (707) 760-0502 for a free estimate.
Neighborhoods We Serve in Hayward
We work across the full Hayward area, from the flatlands near downtown to the hillside streets on the east side where retaining walls and slope conditions change the build. Each neighborhood has its own rhythm for permits and site access.
- Glen Eden
- Burbank
- Mt. Eden
- Tennyson-Alquire
- Fairview
Most Hayward estimates are scheduled within a few days of your call, and full proposals with written pricing follow shortly after the site visit.
Service Area – Cities Near Hayward
While this page covers Hayward, our crews also serve the surrounding East Bay communities. If you’re in San Lorenzo, CA, San Leandro, CA, Moraga, CA, or Oakland, CA, the local conditions and pricing do shift, so give us a call and we’ll point you to the right page or talk through your project directly.
Serving Hayward, CA - Our Local Coverage Area
We’re based in the Hayward 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 ADU Company in Hayward
Yes. Every ADU, garage conversion, and home addition in Hayward requires city permits, and the city’s seismic retrofit standards mean the plans have to be engineered, not drawn on a napkin. We handle the permit package and coordinate inspections. Call (707) 760-0502 and we’ll walk you through what your specific project triggers.
Plan on six to twelve months from design to move-in for a custom detached ADU in Hayward. Prefab units can shorten the on-site phase significantly, often to three or four months once permits are issued. Permitting time varies with city workload, so the earlier we start plans, the better.
No. We provide a written price before any work begins, and that number doesn’t change at the door. If Hayward’s inspection process reveals a required change outside the original scope, we put the new number in writing before doing that work. Call (707) 760-0502 to get your project priced.
If you’re ready to talk about an ADU, a garage conversion, or a home addition in Hayward, call Lodgewick ADU San Francisco at (707) 760-0502. We’ll schedule a free estimate and put your price in writing.
What happens when you call
- 1A real person answersNo phone trees - talk to a local adu pro.
- 2You get an upfront price rangeHonest numbers before anyone is dispatched. No surprises.
- 3We come out and measureLicensed & insured, at a time that suits you - the visit and the quote are both free.
- 4You get the price in writingLine-itemed, yours to keep, and nothing starts until you say go.
What Hayward Customers Say
"The ADU came out beautiful and the permitting, which terrified me, was handled start to finish. They kept me updated every week so I was never wondering what was happening."
- Shauna Mills"Turned our detached garage into a little guest house. Clean crew, respectful of the neighbors, and no mystery charges at the end. Love how it turned out."
- Carmela Fontes"I was nervous about adding on but they walked me through every step and every cost before we started. No surprise change orders halfway through like I'd heard horror stories about."
- Eleanor Pratt
