Golden State ADUs designs, engineers, permits, and builds accessory dwelling units (ADUs) for Placerville homeowners as one accountable team. You hire one ADU builder, sign one contract, and work with one group of people from the first property walkthrough through final inspection. We are licensed and bonded (LIS. #1125656), every ADU we build carries a 10-year structural integrity warranty and a 1-year fit-and-finish warranty, and we are trusted by 100+ happy customers across the greater Sacramento region.
An accessory dwelling unit is a legal second house on your property, and getting one approved means working through zoning, permits, and building codes that change by jurisdiction. In Placerville, the first question is not floor plans or where the ADU sits in the backyard. It is whether your property falls inside city limits or in unincorporated El Dorado County. The City tells applicants to verify that the job address is within Placerville city limits before applying for a City building permit, and that single answer determines your permit office, your review path, and your fees. We confirm it before we draw anything.
Start with a free 1-hour walkthrough of your property. No obligation, no pressure, just a clear read on what is possible. Book a consultation or call (916) 909-2387.
Our ADU Design, Permits and ADU Construction Services in Placerville
We own all three phases in-house. Architectural design, structural and civil engineering, permits, and field construction come from one team, so nothing gets handed to an outside firm and nothing falls between two companies. Here is what that covers on a Placerville ADU project, and you can see the full scope on our ADU services page.
ADU Design and Space Planning
Your ADU gets designed around how you actually plan to use the space. We draw custom ADUs rather than dropping a stock plan onto a lot, working through layouts from studios to 3-bedroom configurations, each with a full kitchen and bathroom, using high-quality materials selected for the finish level you want. Our in-house design and engineering arm, Golden State Design & Engineering, handles the architectural work. Exterior design matters here: Placerville requires new ADU exterior work to incorporate the primary dwelling’s exterior appearance, architectural features, building materials, window style and roof slopes, subject to stated exceptions. We design to that standard from the start, so the finished ADU reads as part of the house rather than an add-on parked in the backyard.
ADU Options in Placerville: Detached, Attached ADUs and Garage Conversions
Most Placerville homeowners choose between a few ADU options, and the right one usually comes down to your property and your price range. The benefits land differently for every household. Some owners want rental income or passive income from a backyard unit. Others want a guest house close enough for a parent to stay independent, and some simply need additional living space for a family that outgrew the house. ADU housing is one of California’s more practical answers to the affordable housing shortage, and a well-built unit adds long term value to the property at the same time.
- Detached ADU: a separate structure placed elsewhere on the property, with full privacy for a renter or family member. ADUs are typically limited to 1,200 square feet.
- Attached ADU: built as an extension of the primary residence, often the more economical option when utilities are already close. Code can tie the maximum size of attached ADUs to your primary home’s size, which we confirm against current rules before design.
- Garage conversion ADU: reusing an existing garage footprint, which can simplify site work on a sloped parcel and keep excavation off the budget. An ADU garage conversion sits closer to remodeling than to ground-up construction, and we confirm parking requirements with the City during feasibility.
- ADU with garage: new living space built alongside covered parking when the property has room for both.
- Junior ADU (JADU): created within the existing space of the main house and limited to 500 square feet.
We will tell you which of these your property actually supports before you fall in love with one.
Permits and Code Compliance, Done for You
Permits, paperwork, compliance, done for you. An ADU in Placerville requires a building permit, and zoning rules dictate setbacks and height limits that have to be resolved on paper before submittal. Most homeowners are not aware of how many separate items a complete submittal involves. We handle the whole package:
- Jurisdiction verification: City of Placerville or El Dorado County
- The scaled site plan, floor plan and architectural elevations Placerville requires with an ADU application
- Separate address assignment, which every Placerville ADU needs through the City’s address-assignment process
- The ADU deed restriction, which City guidance requires be recorded with the El Dorado County Recorder-Clerk before permit issuance
- Grading permits when your scope triggers one
- Fire review coordination with the El Dorado County Fire Protection District, which the City contracts with for fire-safety services
Plan on roughly one to two months of agency review once a complete application is in, with corrections handled by us rather than landed on you.
Structural and Civil Engineering for Sloped Placerville Properties
The engineering is where Placerville ADU budgets are won or lost. Sloped terrain increases both ADU construction cost and complexity, and Placerville’s development guide describes local soils as hilly-upland soils that are often stony and medium-to-shallow over bedrock, with expansive clay known to occur in the city. Our in-house structural and civil engineers design the foundation, the drainage, and the erosion control for your actual property. Placerville’s ADU guidance calls for engineering of retaining walls 48 inches or more in height measured from the bottom of the footing to the top of the wall, and a grading permit is generally required when work involves at least two feet of cut or fill or at least 50 cubic yards of graded material. Utility extensions from the main house belong in that same conversation.
ADU Construction and Interior Finishes
We build your ADU with quality, care, and on-time delivery. The building process moves through foundation, framing, rough trades, and finishes under on-site project management and daily quality oversight, with expert craftsmanship where it shows most. Interior design bundles are available if you want curated furniture layouts, material selections, and finishing details handled with the build. After final inspection and handover, our construction administration team stays reachable. Every project carries the 10-year structural integrity warranty and the 1-year fit-and-finish warranty.
Why Placerville Homeowners Choose Golden State ADUs as Their ADU Builder
One company, one contract, one accountable team from feasibility through final inspection, with no separate architect, engineer, and builder for you to coordinate. When something needs to change on a Placerville hillside property, the designer, the engineer, and the field crew are already in the same conversation. The advantages show up in the schedule and in the finished unit, because high quality ADUs come from professionals who answer to each other instead of to three different contracts. Here is the proof behind that.
One Team From Feasibility to Final Inspection
Design, engineering, permits, and construction all sit under one roof at Golden State ADUs, so we manage the entire process. That matters most at the beginning: ADUs require navigation of local zoning, permits, and building codes, and in Placerville the City tells applicants to verify that the job address is within city limits before applying for a City building permit. We run that check, read the site conditions, and confirm the path forward before asking you to commit to a design or a deposit. No homeowner should pay for drawings aimed at the wrong permit counter.
Licensed, Bonded and Warrantied: Vetting Any ADU Builder
We are licensed and bonded under LIS. #1125656, and every ADU we build carries a 10-year structural integrity warranty and a 1-year fit-and-finish warranty. We have 18 Google reviews and are trusted by 100+ happy customers. California generally requires builders performing ADU work to hold a B-General Building contractor license, and homeowners comparing trusted ADU builders should expect verified licensing and insurance documentation without hesitation when they ask. Ask us. We will send it.
Fair, Transparent Pricing With Assumptions in Writing
Your ADU cost breakdown separates the unit itself from the site work, because in Placerville those are two very different numbers. We itemize design and construction, then list excavation, retaining, drainage, utility extensions, and permit fees as their own lines with the assumptions written down. At the strategy session we apply value engineering, showing clients where a design change saves real money and where it only moves cost somewhere else. Your contract includes a defined payment schedule and construction milestones. We do not quote a fixed price before we understand your property, and we would rather tell you a parcel is a poor candidate than sell you a surprise.
Responsive Communication You Don’t Have to Chase
You get a named point of contact and regular project updates without having to ask twice. We respond quickly to calls and emails, and you will know what happened last week and what happens next. Being left in the dark is the most common complaint homeowners bring us from past projects, and it is the easiest one to solve.
Ready for a straight answer about your property? Schedule a meeting or call (916) 909-2387.
How Building an ADU in Placerville Works, Step by Step
Five steps, start to keys, and our job is to keep that stretch stress free for you. Typical planning guidance for building an ADU is 3 to 5 months for plans and permits and 3 to 4 months for construction, which puts most ADU projects in the range of 5 to 11 months overall. Those are typical ranges based on our work in cities throughout California, not guarantees, and your site conditions move the timeline.
Step 1: Free Consultation and 1-Hour Property Walkthrough
The first step is a free consultation at your property. We confirm jurisdiction first, since parcels outside Placerville city limits are served by the El Dorado County Planning and Building Department rather than the City Building Division. Then we walk slope, access, utilities, setbacks, fire exposure, and historic status. You leave the hour knowing whether an ADU on your property is realistic and roughly what building an ADU there would involve.
Step 2: Design and Engineering
We develop your floor plan, then design the exterior to incorporate the primary dwelling’s appearance, architectural features, materials, window style and roof slopes as Placerville requires. Structural and civil engineering runs alongside the architecture, not after it. You review an itemized ADU cost breakdown and value-engineering options before anything goes to a permit counter.
Step 3: Permit Submittal and Approvals
We submit to the City of Placerville Development Services Department, Building Division at 3101 Center Street, or to El Dorado County if your property sits outside city limits. Placerville requires a complete ADU application to be approved or denied within 60 days when an existing single-family house is on the lot, unless the applicant voluntarily requests more time. That clock starts at a complete application, which is the part most homeowners underestimate. We handle corrections, the separate address, and the deed restriction. Note that the ADU ordinance was amended by Ordinance 1732 on January 27, 2026, so we build to current code.
Step 4: ADU Construction
Foundation, framing, rough trades, finishes. We schedule around the City of Placerville’s field inspections, which are conducted on Tuesdays and Wednesdays only, so sequencing gets planned rather than improvised. You receive weekly updates and a site that stays organized.
Step 5: Final Inspection and Handover
Final inspection, then a walkthrough with you, then keys. You receive your warranty documents and a punch list closed out. Our construction administration team stays available after move-in for questions, adjustments, and anything covered under warranty.
What Makes Placerville ADU Housing Different
Four conditions shape nearly every Placerville ADU project. Recognize your property in these and you will understand why a generic square-foot quote rarely survives contact with a foothill lot.
City Limits or El Dorado County: Know Before You Design
A Placerville mailing address does not confirm which agency issues your ADU permits. The City tells applicants to verify that the job address is within Placerville city limits before applying for a City building permit. Inside city limits, permits come through the City of Placerville Development Services Department, Building Division at 3101 Center Street. Outside them, the El Dorado County Planning and Building Department handles it, with its own requirements that an ADU builder working this area needs to know. Inside the city, the current ADU ordinance was amended by Ordinance 1732 on January 27, 2026, and the building-service fee schedule effective February 9, 2026 uses a valuation-based tiered fee for major projects, with plan review charged at 50% of the building-permit fee plus a $132 processing charge. Advice written before those dates may be out of date.
Ridges, Ravines and Foothill Soils
Placerville’s General Plan describes residential streets as following ridges and ravines, with properties ranging from very small in-town parcels to large rural acreage, and single-family zoning minimums run from 6,000 square feet to five acres depending on the district. The City reports that much of Placerville’s developable vacant single-family land has an average slope greater than 10%. Sloped terrain increases ADU construction cost and complexity, and local soils are described as hilly-upland soils, often stony and medium-to-shallow over bedrock, with expansive clay known to occur in the city.
That is why a detached ADU placed 20 feet behind your house can price very differently from the same unit on flat ground. A grading permit is generally required when work involves at least two feet of cut or fill or at least 50 cubic yards of graded material. Not every Placerville backyard needs rock excavation, a retaining wall, or a soils report. Some do. We find out which yours is before you commit.
Older Houses, Historic Districts and Exterior Design Rules
Placerville reported 3,095 detached single-family houses out of 4,715 total housing units in 2019, and using 2013 to 2017 ACS data the City reported that roughly 73% of housing units were at least 30 years old. Older houses mean we check electrical-service capacity, sewer routing, and water connections early, since utility upgrades are a real ADU cost driver.
The City officially recognizes four residential historic districts: Spring Street and Coloma Street, Bedford Avenue and Clay Street, Cedar Ravine, and Sacramento Street with Chamberlain Street. Exterior alterations visible from the street in those districts are subject to historic-design criteria. Citywide, new ADU exterior work must incorporate the primary dwelling’s appearance, architectural features, materials, window style and roof slopes, subject to stated exceptions. We design to match rather than retrofit after a correction notice.
Weather, Wildfire and Scheduling the Build
Placerville’s development guide reports approximately 39.72 inches of annual rainfall and several significant snowstorms during a typical winter, which makes grading season a scheduling decision rather than an afterthought. The City requires a more detailed grading and erosion-control schedule when rough grading is proposed between October 15 and May 1, so we sequence earthwork with that window in mind. The Housing Element describes Placerville as predominantly within a Very High Fire Hazard Severity Zone, and the City contracts with the El Dorado County Fire Protection District for fire-safety services, which means fire review is part of the plan from the first sketch. These are planning items we handle, not reasons to stop.
Frequently Asked Questions
How much does an ADU cost to build in Placerville?
ADU cost depends on size, finish level, and site work, which is why we price an accessory dwelling unit as an itemized breakdown rather than one square-foot number. Regional estimates for the greater Sacramento area commonly land around $250 to $300 per square foot, but treat that as a starting reference only. Real cost drivers here are slope, excavation, retaining, drainage, and utility extensions. On permits, ADUs under 750 square feet are typically exempt from impact fees in California, and Placerville’s current fee schedule is valuation-based, with plan review at 50% of the building-permit fee plus a $132 processing charge.
Do I need permits to build an ADU in Placerville?
Yes, a building permit is required for an ADU in Placerville, and the issuing office depends on whether your property is inside city limits or in unincorporated El Dorado County, where the County Planning and Building Department handles it. A complete City application includes a scaled site plan, floor plan, and architectural elevations along with grades, setbacks, and exterior finish details. Once the application is complete, the City must approve or deny it within 60 days when an existing single-family house is on the lot, unless you request more time.
What are the ADU setbacks in the City of Placerville?
A new detached ADU in Placerville generally has four-foot interior side and rear yard setbacks measured from the property line. On a corner lot, the current code specifies a 10-foot street-side setback. The front setback is taken from the front property line and follows your underlying zoning district, though the City may reduce it as needed to permit construction of an 800-square-foot ADU. Zoning also governs height, so confirm your specific district with the City planning department or let us do it during your walkthrough.
How long does building an ADU take in Placerville?
Plan on 3 to 5 months for plans and permits and 3 to 4 months for construction, typical ranges rather than guarantees, which puts most ADU projects around 5 to 11 months end to end. Agency review itself often runs one to two months, and Placerville’s 60-day decision clock only starts once your application is complete. During construction, the City conducts field inspections on Tuesdays and Wednesdays only, so we schedule trades around those days.
Can I rent out my Placerville ADU?
Yes, a permitted ADU can be legally used as a rental unit for additional income or kept as living space for family or guests. The City’s published ADU deed-restriction guidance prohibits rentals of less than 31 days, so plan for long-term tenancy or family use rather than short stays. That deed restriction must be recorded with the El Dorado County Recorder-Clerk before permit issuance. Confirm the current specifics with the City before you build around a rental plan.
Do you serve Placerville from your Roseville office?
Yes. Our office is at 1001 Enterprise Way #100 in Roseville, and we are not Placerville-based. Route tools place the two cities roughly 35 to 37 driving miles apart, about 46 to 47 minutes under uncongested conditions, with US 50 the main approach. We work with homeowners in neighboring communities including Camino, Shingle Springs, El Dorado Hills, and Cameron Park, and across the wider Sacramento region from Elk Grove to the foothills.
Start Your Placerville ADU With a Free Consultation
The first step is a free consultation, and you get three things from it: confirmation of whether your property falls under the City of Placerville or El Dorado County, a feasibility read on slope, access, utilities, setbacks, and fire exposure, and a realistic ADU cost range with the assumptions written down.
There is a practical reason not to rely on older research, because recent ADU rule changes are not reflected in it. The Placerville ADU ordinance was amended by Ordinance 1732 on January 27, 2026, and the building-service fee schedule changed effective February 9, 2026, with plan review at 50% of the building-permit fee plus a $132 processing charge. Beyond that, grading, drainage, utility, and fire issues cost far less to solve on paper than in the field.
Contact one of our ADU specialists today. Call (916) 909-2387, email office@gsadus.com, or book a consultation. You will find us at 1001 Enterprise Way #100 in Roseville, about a 35-mile drive from Placerville, and we will come to you.
