Fast, Reliable New Detached ADU Across Citrus Heights
A new detached ADU in Citrus Heights typically runs $195,000 to $340,000 all-in, from the first site survey through the final certificate of occupancy. The wide range comes down to three things: whether your lot falls under county septic and well setback rules, whether your home still has a 100-amp panel, and whether pre-1997 permit records turn up anything that has to be legalized first. Our team at Ellery ADU Studio has navigated all three on 900+ ADU projects since 2015, and we scope each one before we quote. Call (971) 497-2402 to get a written price.
Citrus Heights is not Sacramento, and it is not Roseville. The city incorporated in 1997, which means most of its housing stock was permitted under Sacramento County. That single fact changes how a new detached ADU gets designed, permitted, and built here. We know what to pull, what to check, and what to budget for before the first shovel goes in.
Why Ellery ADU Studio Is Citrus Heights’s Preferred New Detached ADU Company
Most ADU projects in Citrus Heights stall for one of three reasons: a pre-1997 unpermitted addition surfaces during plan check, the septic or well setback was never verified, or the electrical service cannot carry the new load. We have seen all three on properties off Oak Avenue, Sylvan Corners, and throughout the Ranchwood and Arcade Creek neighborhoods. Our design-build model means the drawings, the permit set, and the construction are one contract at one written price, so the typical designer-versus-builder blame game never gets started. New Detached ADU work in this city requires someone who reads the permit history before drawing the property line.
The studio was founded in 2015 by Nadia Ellery, and every project since has been governed by The Haven Standard. Clause 1: a written price before any work starts. Clause 5: the scope is locked at signing, no door-side upsells, no scope creep. Clause 9: the 365-Day Done Right Promise, in writing, before the project starts. That is the document homeowners in Citrus Heights should ask any builder to produce. We already do.
Our crews are background-checked and uniformed, and our license number appears on every page we send. When you call (971) 497-2402, a live person answers. No voicemail queue, no callback promise that does not materialize.
Our New Detached ADU Services in Citrus Heights
Custom Built ADU
A custom built ADU in Citrus Heights runs $220,000 to $340,000 for a 1-bed or 2-bed unit with a full kitchen, bath, and laundry. On larger lots near Fair Oaks Boulevard or along Old Auburn Road, we often design 800 to 1,000 sq ft units with separate entrances and private side yards. Custom framing gives us control over roofline, window placement, and sound isolation, matters when the existing home is a 1960s ranch that was never insulated for close-quarter living.
Prefab ADU Installation
Prefab ADU installation in Citrus Heights typically runs $195,000 to $280,000 including site work, foundation, utility trenching, and the unit itself. We specify and coordinate systems from Cover, Dvele, and Boxabl within the same single contract. The catch in Citrus Heights is not the factory, it is the lot: many 6,000 to 8,000 sq ft parcels have mature trees and narrow side setbacks that limit crane access. We survey that before ordering the module.
Modular ADU
A modular ADU in Citrus Heights runs $200,000 to $290,000, similar to prefab but with more flexibility on panel widths and rooflines. For homeowners who want a unit that looks like a small house rather than a delivered unit, modular framing with site-finished siding is usually the answer. We have installed modular units on properties near Sunrise Boulevard where the access path runs past the existing garage, and we stage materials to avoid tearing up the driveway more than once.
Studio ADU
A studio ADU in Citrus Heights runs $160,000 to $220,000 for a 400 to 500 sq ft open plan with a full bath and kitchenette. These are the most common choice for rental income on lots in the 6,000 sq ft range, where a larger 2-bed would eat the entire backyard. The trade-off is service capacity: even a studio needs a 100-amp subpanel and its own mini-split, which we fold into the written price before framing starts.
What happens when you call
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A real person answersNo phone trees - you reach a local pro.
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You get an upfront price rangeHonest numbers before anyone is dispatched.
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A background-checked tech heads outLicensed & insured, dispatched right away.
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You approve before work beginsNothing starts until you say go.
Trusted Brands We Service in Citrus Heights
We specify and coordinate prefab and modular systems from Cover, Dvele, and Boxabl, and we know which of their standard plans clear Citrus Heights setback and height rules without a variance. When a unit needs a replacement part or a warranty fix, our crews have the manufacturer contacts and the local parts channels to get it done without shipping a module back to a factory. No brand gets blamed when something is off, because the contract is with us, not with three different parties.
Common New Detached ADU Problems We See in Citrus Heights Homes
- Pre-1997 unpermitted work surfacing during plan check. A garage-to-workshop conversion done in 1989 with no county permit becomes an open violation when the city reviews the ADU plans. Legalizing it can add $3,000 to $9,000 and four to eight weeks.
- 100-amp electrical panels that cannot carry a new ADU. Most 1960s and 1970s ranches in Citrus Heights were built with 100-amp service and galvanized plumbing. A full 200-amp upgrade plus a dedicated 125-amp subpanel is standard before the ADU can pass final inspection.
- Septic and well setbacks that differ from city standards. Many acreage lots in Citrus Heights still fall under county health department rules for private septic tanks and wells. A detached ADU placed too close must be redesigned or moved, which changes the foundation and trenching line items.
- Cooling loads in 105°F summers. The Sacramento Valley heat makes a ductless mini-split non-negotiable. Homes that try to extend central HVAC to a detached unit end up with an undersized system and a unit that never cools below 80°F in August.
Pricing for New Detached ADU in Citrus Heights, CA
A new detached ADU in Citrus Heights runs $195,000 to $340,000 depending on unit type, site conditions, and what the permit search turns up. Here is what we put on the written estimate:
- Studio ADU (400-500 sq ft): $160,000-$220,000
- 1-Bed ADU (500-700 sq ft): $195,000-$260,000
- 2-Bed ADU (700-1,000 sq ft): $240,000-$340,000
- Prefab or modular unit, including site work: $195,000-$290,000
- 200-amp service upgrade with subpanel: $4,000-$8,000
- Pre-1997 county record search and legalization work: $3,000-$9,000 when violations are found
Every price is written before work starts, per Haven Standard Clause 1. No door-side upsells. No change orders unless you change the scope. Call (971) 497-2402 and bring any written estimate you already have. We will give you a Free Second Opinion, line by line.
We Also Serve Cities Near Citrus Heights
Our crews work throughout the Sacramento metro: New Detached ADU in Citrus Heights, plus Orangevale, Fair Oaks, Roseville, and Antelope. Different jurisdictions, different permit histories, same written-price model. Dispatch and scheduling are coordinated from our Sacramento office, and crews serve Citrus Heights locally.
Serving Citrus Heights, CA - Our Local Coverage Area
We’re based in the Citrus Heights 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 - New Detached ADU in Citrus Heights
Yes. If your home was built before 1997, you need to pull Sacramento County’s archived permit records before submitting city plans. A garage conversion, addition, or electrical change made without a county permit will surface as an open violation during the city’s ADU plan check, and resolving it can add weeks and thousands of dollars to the project. We run this search as part of our pre-quote site assessment. Call (971) 497-2402 to have it scheduled.
Septic and well setbacks define the minimum distance between your new ADU and any private septic tank, leach field, or well on the property, and many Citrus Heights acreage lots fall under Sacramento County health department rules rather than city standards. If the ADU is too close, it must be redesigned or relocated, which changes foundation, trenching, and grading costs. We verify setbacks before we quote, not after. Call (971) 497-2402 if you have a well or septic system on your lot.
No. A 1970s-era 100-amp panel will not handle a new detached ADU with a mini-split, kitchen appliances, and lighting. The standard scope is a 200-amp service upgrade on the main home plus a dedicated 125-amp subpanel for the ADU, which runs $4,000 to $8,000 and is included in the written price. Skipping the upgrade fails final inspection.
Because Citrus Heights regularly sees summer stretches above 105°F, and a detached ADU cannot get adequate airflow from a central system extended off the main house. A ductless mini-split sized to the unit’s cooling load is the standard approach, and it keeps the ADU at a rentable temperature without oversized ductwork running across the yard. We size the system during design, not after the walls are closed.
Often, yes. Large lots in Citrus Heights, especially those with open rear yards or sloping ground near Arcade Creek, frequently need spot grading and drainage swales so the new unit does not sit in a low spot during winter rains. This work is scoped during the site survey and included in the written price. It is rarely optional. Call (971) 497-2402 for a site walk.
Our Process in Citrus Heights
On a 1972 ranch property off Oak Avenue, we scoped a new detached 2-bed ADU in a large backyard. Before staking the foundation, we pulled the pre-1997 Sacramento County records and found a 1989 garage-to-workshop conversion with no permits, plus a 100-amp panel that needed a 200-amp upgrade. We built the ADU with a dedicated 125-amp subpanel and a ductless mini-split, and handled the county title-search and legalization paperwork before the city would sign off. That is the standard, not the exception.
Every site visit includes a documented photo record. You receive evidence of what was found and what was done, not a summary of how it felt. Nadia Ellery, owner of Ellery ADU Studio, holds every project to The Haven Standard: written price, locked scope, documented evidence, and a 365-Day Done Right Promise in writing.
Call (971) 497-2402 to schedule a site walk and get a written price for your new detached ADU in Citrus Heights.
Written by Nadia Ellery, Owner at Ellery ADU Studio, serving Citrus Heights since 2015.