ADU in Clovis, CA
ADU design and permitting in Clovis runs $12,000-$28,000 for drawings, structural engineering, Title 24 energy calculations, and permit submission, before construction ever begins. That range covers the full permit set for a detached unit, a garage conversion, or a junior ADU, and it reflects the single biggest variable in Clovis: whether your HOA’s architectural committee decides to complicate the elevations. Call (971) 497-2402 and we’ll walk you through the exact deliverables line by line, in writing, before any commitment.
Why Clovis Homes Are Different
Clovis splits into two housing generations that demand two different ADU strategies. North of Shaw Avenue, the dominant stock is the 1990s-2010s two-story stucco tract home with a three-car garage, almost always inside an HOA-governed master-planned community like Harlan Ranch or Loma Vista. Those homes present the “ghost garage” problem: state law voids the old CC&R parking mandate that required three covered spaces, but the architectural committee still controls the front elevation, so a garage conversion often requires installing a non-functional garage door over the converted wall to satisfy design review. The second Clovis housing type, concentrated near Old Town Clovis, is the 1950s-1970s ranch on larger lots. Those properties are easier for detached ADUs from a setback standpoint, but their electrical panels, typically 100 amps, rarely support a second dwelling without an upgrade.
Climate drives the design conversation in every Clovis project. Summer highs of 105-112°F mean an undersized mini-split on a standalone ADU fails fast, because a detached structure has no shared thermal mass with the main house. And the San Joaquin Valley Air Pollution Control District’s particulate standards mean whole-house ventilation and filtration for a new unit gets more scrutiny here than almost anywhere else in California. We size for the valley, not for a generic California climate zone.
Our Main Clovis Services
Two ADU paths dominate in Clovis: converting the three-car garage that’s already under your roofline, or building a new detached unit in the rear yard. Both have their own economics, their own permit timelines, and their own HOA exposure.
Garage Conversion ADU in Clovis
The three-car garage is the most frequent ADU starting point in Clovis because the structure already exists. The catch is nearly always the HOA architectural committee, not the city. In Harlan Ranch, Loma Vista, and similar north Clovis communities, the CC&Rs were written before California’s ADU reform laws, and the committees still enforce exterior appearance rules. The standard workaround is “ghost garage” finishing: a non-functional garage door over the converted front wall that satisfies design review while the interior becomes a legal dwelling. We handle that negotiation as part of the permit set. Full details on Garage Conversion ADU in Clovis.
New Detached ADU in Clovis
Detached ADUs in Clovis make the most sense on the larger 1950s-1970s lots near Old Town Clovis, where side and rear setbacks leave room for a real structure. North Clovis tract lots are tighter, but a well-placed detached unit behind the existing home still works when the HOA approves a rear-yard structure. The design decisions that matter most here are HVAC sizing for a standalone envelope and the foundation type, because Clovis soils vary from compacted clay to sandy loam. We cover the full scope on the New Detached ADU in Clovis 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.
ADU Design & Permitting in Clovis
Design and permitting in Clovis is where most ADU projects stall, and it’s usually not at City Hall. The City of Clovis permit path is well-defined, but the parallel HOA architectural review in master-planned communities north of Shaw is not. A permit set that sails through the city can sit in front of an HOA committee for weeks if the elevations don’t match the tract’s original stucco and roofline character. We run both tracks simultaneously from day one, and every client receives the full permit set, written scope, and documented photo record before construction starts. This is the core of what we do, and it’s covered in detail on our ADU Design & Permitting page.
Site Assessment
Signs you need it
You’re not sure whether the ADU fits in the rear yard, whether the existing panel can carry the load, or whether the HOA will even allow the structure you want.
What it costs in Clovis
A full site assessment in Clovis runs $1,500-$3,500, including soil review, utility locating, and HOA CC&R analysis.
How we do it
We document existing conditions, pull the HOA governing documents, check panel capacity and soil type, and hand you a written feasibility summary with the numbers attached.
ADU Design & Blueprints
Signs you need it
You have a rough idea of what you want but no drawings that would survive either the city’s plan check or an HOA design review.
What it costs in Clovis
Full architectural drawings and structural engineering for a Clovis ADU run $6,000-$14,000, depending on whether it’s a conversion or a detached structure.
How we do it
We draft the architectural set, coordinate structural and Title 24 work, and run the elevations through an internal HOA-style review before submission, because a Clovis committee will reject what a coastal city would approve.
Permit Application
Signs you need it
You’ve heard enough permit horror stories, or you’ve already been through one round of plan check corrections and you’re tired of being the messenger.
What it costs in Clovis
Permit application and plan check coordination in Clovis typically runs $4,500-$10,500 as a standalone service, or is included when we handle the full design-build scope.
How we do it
We file the full set with the City of Clovis, respond to every plan check comment in writing, and track the permit through issuance, including the parallel HOA submittal.
What ADU Design & Permitting Costs in Clovis
| Item | Typical range in Clovis |
|---|---|
| Site assessment with HOA CC&R review | $1,500-$3,500 |
| Architectural drawings & structural engineering | $6,000-$14,000 |
| Permit application & plan check coordination | $4,500-$10,500 |
Will the HOA in Clovis actually block my ADU?
State law bars HOAs from outright prohibiting ADUs, but architectural review is still allowed and can add weeks or months. A “ghost garage” elevation detail is the standard Clovis workaround. Call (971) 497-2402 for a written review of your CC&Rs.
How long does Clovis design and permitting take?
City plan check typically runs 8-14 weeks; HOA review can add another 4-10 weeks if it runs parallel instead of before submittal. A complete plan set shortens both. Estimates are free.
Junior ADU & Interior Conversion in Clovis
Junior ADUs and interior conversions in Clovis cost $60,000-$140,000 all-in, drawings through final inspection, which is the most affordable path to a legal second dwelling in the city because the structure already exists. The trade-off is that a JADU or interior conversion is capped at 500 square feet and typically shares the main home’s utilities, so an undersized panel in a 1990s tract home north of Shaw is often the first upgrade. We cover the full scope, including panel replacement and all permit documentation, on the Junior ADU & Interior Conversion page.
Room-to-ADU Conversion
Signs you need it
You have a large bedroom, a bonus room, or a finished sunroom that sits empty most of the year and you want it to generate rental income.
What it costs in Clovis
A room-to-ADU conversion in Clovis typically runs $60,000-$110,000, depending on bathroom addition, kitchenette scope, and panel work.
How we do it
We wall off the space, add the required kitchenette and bath, upgrade the panel if needed, and file the permit set so the square footage becomes a legal JADU.
Attached Addition ADU
Signs you need it
Your home has no unused interior space to convert, but the lot is too tight for a detached unit, so an attached addition is the only viable path.
What it costs in Clovis
Attached addition ADUs in Clovis run $180-$280 per square foot, so a 500-square-foot unit lands between $90,000 and $140,000.
How we do it
We extend the existing footprint, match the stucco and roofline to the tract elevation, and integrate the HVAC load into the home’s existing system so the valley summers don’t overwhelm a single mini-split.
What Junior ADU & Interior Conversion Costs in Clovis
| Item | Typical range in Clovis |
|---|---|
| Room-to-ADU conversion | $60,000-$110,000 |
| Attached addition ADU (per sq ft) | $180-$280 |
| Electrical panel upgrade (100A to 200A) | $4,000-$7,000 |
Can I rent out a JADU in Clovis?
Yes, a permitted JADU is a legal rental unit in Clovis, and the written permit set is what protects that income stream. Call (971) 497-2402 for a written price before work starts.
Does my 1990s panel need to be upgraded for a JADU?
Usually, yes. Most 1990s tract homes in north Clovis have 100-amp panels, and a JADU with a kitchenette and mini-split typically requires 200 amps. We quote the upgrade with the conversion.
ADU Site Prep & Utilities in Clovis
Site prep and utilities for a Clovis ADU run $15,000-$40,000, and the biggest variable is almost never the ADU itself: it’s the existing panel, the sewer lateral, and the soil under your rear yard. In the 1990s tract homes north of Shaw, the panel is the recurring bottleneck; in the older ranch-style properties near Old Town Clovis, the sewer lateral and the electrical service drop are the usual unknowns. We write the scope after we see the site, not before, and every client receives the documented photo record from the first visit. Details live on the ADU Site Prep & Utilities page.
Electrical Panel Upgrade
Signs you need it
Your panel is 100 amps, your home was built before 2000, or you’ve already tripped a breaker just running the AC and a space heater.
What it costs in Clovis
A 100-to-200-amp panel upgrade in Clovis runs $4,000-$7,000, including the new panel, breakers, and the city inspection.
How we do it
We replace the panel, coordinate the utility disconnect with the local provider, and schedule the City of Clovis electrical inspection so the ADU subpanel has clean capacity.
Plumbing Lateral
Signs you need it
Your home is pre-1980 and still on its original clay or cast-iron sewer lateral, or you have repeated slow drains and root intrusion in the rear yard.
What it costs in Clovis
Replacing or extending a sewer lateral for a Clovis ADU runs $6,000-$14,000, depending on run length and whether trenchless methods are viable.
How we do it
We camera the existing line, determine whether the ADU can tie into the existing lateral or needs its own run, and handle the trench and the connection to the main.
What ADU Site Prep & Utilities Costs in Clovis
| Item | Typical range in Clovis |
|---|---|
| Electrical panel upgrade (100A to 200A) | $4,000-$7,000 |
| Sewer lateral extension or replacement | $6,000-$14,000 |
| Foundation & grading (new detached site) | $5,000-$19,000 |
Will my old Clovis ranch home need a full rewire for an ADU?
Not usually. A panel upgrade plus a dedicated subpanel for the ADU is the standard fix, but aluminum wiring from the 1960s will need to be addressed. Call (971) 497-2402 for an exact written quote.
Can you tie my new ADU into the existing sewer line?
Often yes, if the existing lateral has capacity and is in good shape. We camera the line first and show you the footage on site. Estimates are free, and the scope is locked in writing at signing.
Brands We Service in Clovis
We specify and coordinate prefab and modular systems from Abodu, Cover, Dvele, and Mighty Buildings within the same single contract as the site work and utilities. Turnaround on prefab panels depends on the factory schedule, but the site prep and foundation are handled locally by our crews in Clovis. See our brands for the full list.
Pricing for ADU in Clovis, CA
| Service | Typical range in Clovis |
|---|---|
| Site assessment with HOA CC&R review | $1,500-$3,500 |
| Architectural drawings & structural engineering | $6,000-$14,000 |
| Permit application & plan check coordination | $4,500-$10,500 |
| Room-to-ADU conversion | $60,000-$110,000 |
| Attached addition ADU (per sq ft) | $180-$280 |
| Electrical panel upgrade (100A to 200A) | $4,000-$7,000 |
| Sewer lateral extension or replacement | $6,000-$14,000 |
| Foundation & grading (new detached site) | $5,000-$19,000 |
In Clovis, two factors push prices up faster than anywhere else in the valley: HOA architectural review cycles and summer HVAC sizing on a standalone structure. Every project gets a written price before any work starts, per Haven Standard Clause 1, and that price is locked at signing: no door-side upsells, no scope creep.
Neighborhoods We Serve in Clovis
We work in every Clovis neighborhood, but most of our projects land in the master-planned communities north of Shaw and the older ranch-style streets near Old Town.
- Harlan Ranch
- Loma Vista
- Old Town Clovis
- Buchanan Estates
- Quail Lakes
Response time across Clovis is typically same-day or next-day for site assessments and written quotes.
Service Area - Cities Near Clovis
Beyond Clovis, we work throughout the Central Valley. Our dispatch and scheduling are coordinated from the Fresno, Central Valley office, and crews serve Clovis locally. See our coverage in Fresno, CA, Madera, CA, Reedley, CA, and Hanford, CA.
Serving Clovis, CA - Our Local Coverage Area
We’re based in the Clovis 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 in Clovis
Yes. The City of Clovis issues the building permit, and if you live in an HOA-governed community like Harlan Ranch or Loma Vista, the architectural committee must also sign off on exterior elevations. State law limits what the HOA can prohibit, but design review is still required. We run both tracks together.
Plan check typically runs 8-14 weeks, HOA review can add 4-10 weeks, and construction runs 4-8 months for a garage conversion and 6-10 months for a detached unit. The permit set quality drives the timeline more than anything else.
Yes, that’s Haven Standard Clause 1, and it’s not negotiable: every Clovis project gets a written line-item price before any work starts. Call (971) 497-2402 for a free site assessment and a written quote.
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 Clovis Customers Say
"The rental income has covered the payment since the second month. They were realistic about the numbers rather than optimistic."
- Odette N."They walked us through setbacks and utility capacity before we paid anything, and told us one of our two options was not going to get approved."
- Mireille T."Every allowance was itemised at the start, so the finish selections did not turn into a surprise at the end."
- Benedict H.