A free site visit, a check of what your lot allows and a written, line-item price.
Get your free estimateADU Company in Morgan Hill, CA
Most Morgan Hill homeowners who call us about an ADU are working with a lot between 6,000 and 10,000 square feet, a house built sometime between the 1970s and early 2000s, and a backyard that’s never held anything more than a lawn. That’s actually a good starting point. Morgan Hill’s ADU landscape is shaped by its position in Santa Clara County’s unincorporated fringe: many properties sit just outside city limits but still fall under county ADU rules, and we see far more greenfield detached-ADU construction on open rear yards than the garage conversions and basement apartments common in older Silicon Valley cities. That changes how we plan foundations, drainage, and site access. Call (669) 444-4530 for a free estimate on your Morgan Hill property.
Why Morgan Hill Homes Are Different
Morgan Hill’s hot, dry summers, with temperatures regularly in the 90s and sometimes triple digits, mean a detached ADU needs real ventilation, sun-shading, and usually air conditioning. Not as an upgrade, as a baseline. The cool, wet winters are the other half of the equation: drainage and foundation moisture control matter here, especially for slab-on-grade construction. Skip either and you’ll feel it in the first year.
The soil is the detail that separates a Morgan Hill-specific bid from a generic one. Many Morgan Hill backyards have expansive clay soil that shrinks and swells dramatically with the seasons. Detached ADU foundations on this soil often need deeper piers or a post-tension slab to avoid cracking. A contractor from nearby Gilroy or San Jose might overlook that on a quick bid, and the homeowner pays for it later in drywall cracks and sticking doors. We don’t bid Morgan Hill work without accounting for it.
Housing stock plays a role too. Lots in the 6,000 to 10,000 square foot range, single-family homes from the 1970s through early 2000s, and a growing number of newer subdivisions. That means most Morgan Hill ADU jobs are detached units in open rear yards, not attached conversions. Setbacks, the required gap between your new structure and the property line, are usually workable, but every lot has its own read. We walk the site before we put a dollar figure in writing.
Our Main Morgan Hill Services
Morgan Hill homeowners typically call us about three things: adding a full ADU in the backyard, extending the existing home, or converting underused space into a proper room addition. Each gets its own Morgan Hill page linked below.
Home Addition Contractor in Morgan Hill
A home addition in Morgan Hill usually means extending the existing footprint, not building a separate structure. These projects follow the same soil and drainage rules as ADUs, but they also tie into the existing roofline, electrical panel, and foundation. In Morgan Hill’s clay soil, we check whether the original slab or foundation can support new load before we commit to a number. It’s slower up front and saves real money later. See Home Addition Contractor in Morgan Hill for full pricing and process.
ADU Builders in Morgan Hill
Detached ADUs are the most common project we plan in Morgan Hill, and most of them are greenfield builds on open rear yards. The county’s ADU rules for unincorporated fringe properties, combined with Morgan Hill’s climate and clay soil, shape everything from foundation type to window shading. We work with prefab and modular systems where they fit, including Abodu, Cover, and Dvele, and we’ll tell you honestly when a panelized build saves time versus when a stick-built unit is the better call for your lot. See ADU Builders in Morgan Hill for full scope and cost.
Room Addition Contractor in Morgan Hill
A room addition means converting existing space, a garage, a bonus room, an unfinished area, into livable square footage. In Morgan Hill, where housing stock runs from the 1970s to newer subdivisions, these jobs are less common than detached ADUs but they come up regularly in older neighborhoods. The work often includes insulation, HVAC runs, and bringing the space up to current energy code. See Room Addition Contractor in Morgan Hill for what’s included and what it costs in Morgan Hill.
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 Morgan Hill
We have direct experience with leading ADU product lines including Abodu, Cover, Dvele, and James Hardie exterior systems. That experience means honest guidance on which product fits your Morgan Hill lot and budget, plus faster turnaround when we already know the system. See our brands for the full list.
Pricing for ADU Company in Morgan Hill, CA
| Service | Typical range in Morgan Hill |
|---|---|
| Detached ADU, 400 – 600 sq ft (prefab, no site work) | $180,000 – $235,000 |
| Detached ADU, 400 – 600 sq ft (stick-built) | $210,000 – $280,000 |
| Detached ADU, 600 – 800 sq ft (stick-built) | $260,000 – $320,000 |
| Detached ADU, 800 – 1,000 sq ft | $310,000 – $380,000 |
| Garage conversion to ADU, 400 – 600 sq ft | $140,000 – $195,000 |
| Prefab ADU foundation and site prep only | $35,000 – $70,000 |
| Home addition, 400 – 600 sq ft | $175,000 – $270,000 |
| Home addition, 600 – 1,000 sq ft | $250,000 – $375,000 |
| Room addition / conversion, 200 – 400 sq ft | $95,000 – $165,000 |
What pushes price up in Morgan Hill is usually soil: expansive clay means deeper piers or a post-tension slab, and that’s a real line item. Site access and utility distance also move the number. Whatever the bid, you get one written price before any work begins, no surprise invoices later.
Neighborhoods We Serve in Morgan Hill
We plan and build across Morgan Hill, including the older subdivisions near downtown, the newer communities on the east side, and the large-lot unincorporated properties that sit just outside city limits. Our crews stage locally, so scheduling a walkthrough is usually a matter of days, not weeks.
- Downtown Morgan Hill
- Jackson Oaks
- Paradise Valley
- San Pedro Terrace
- Coyote Valley fringe
Service Area – Cities Near Morgan Hill
Our Morgan Hill crews also cover nearby parts of the South Bay and Santa Cruz mountains. If you’re in San Jose, CA, Santa Clara, CA, Ben Lomond, CA, or Cupertino, CA, we can help there too. Each city has its own page with local pricing and details.
Serving Morgan Hill, CA - Our Local Coverage Area
We’re based in the Morgan Hill 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 Morgan Hill
Yes. Morgan Hill has a mix of city permits and county permits depending on whether your property is inside city limits or on the unincorporated fringe. We identify which jurisdiction applies, prepare the submittal package, and pull permits. Inspections are scheduled with the same office. Call (669) 444-4530 and we’ll check your parcel before you commit to anything.
Most detached ADUs in Morgan Hill run 6 to 10 months from permit submittal to final inspection. Prefab units compress the timeline once the foundation is done; custom stick-built plans add design time up front. Morgan Hill’s clay soil can add a week or two to foundation engineering if deeper piers are required. We’ll give you a written schedule with your written price.
Yes. We cover both incorporated Morgan Hill and the surrounding unincorporated Santa Clara County parcels, including areas on the city’s fringe where county ADU rules apply. If you’re not sure which jurisdiction your lot falls under, call (669) 444-4530 with your address and we’ll verify it free.
If you’re planning an ADU, home addition, or room addition in Morgan Hill, start with a free site walk and a written price. Call (669) 444-4530 or visit our home page to learn more about how we work.
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 Morgan Hill Customers Say
"Backyard ADU for my mother. The project manager showed ID and walked me through the permit steps, the foundation plan, and the schedule. Moved her in on time."
- Margaret C."Detached unit with a small kitchen and bath. Windows and finishes were nicer than I expected for the budget."
- Philip S."Garage conversion into a studio. They framed the insulation, added a mini split, and matched the siding. Inspectors passed everything on the first visit."
- Andrew K.
