An ADU builder in Citrus Heights is a licensed contractor who designs and constructs accessory dwelling units — detached backyard units, garage conversions, attached additions, and junior ADUs (JADUs). Because an ADU is a complete second dwelling, the builder coordinates foundation, framing, plumbing, electrical, and HVAC work and pulls it through Citrus Heights's permit process and utility connections. Not every general contractor has built one, so the right builder is one with ADU-specific experience in California.
What ADU Builders Cost in Citrus Heights [21][22][23][24]
Based on our Citrus Heights cost data, expect the following ranges from local ADU builders. Quotes for the same scope typically vary 20-40% between contractors, so getting at least three bids is the single best way to control cost.
| New Detached ADU (all-in) | $170,000-$400,000 |
| Cost per Sq Ft | $250-$500 |
| Garage Conversion | $90,000-$200,000 |
| Prefab / Modular ADU (installed) | $170,000-$340,000 |
| City Permit & Plan Review | Valuation-based (Master Fee Schedule, February 1, 2026): a $200,000 ADU pays about $2,933 building permit plus 65% plan check ($1,906), 6% General Plan and 4% technology surcharges, a 3.25% zone check and $94 issuance, roughly $5,300 in all; get a quote from Building at (916) 727-4760. |
| Impact Fees | State law bars impact fees on an ADU of 750 sq ft of interior livable space or less and a JADU of 500 sq ft or less (Gov. Code §66311.5(c)). The city's Impact Fee Schedule (January 1, 2026) marks smaller ADUs EXEMPT and charges an ADU of 750-1,200 sq ft $1,467 multimodal + $3,045 park + $887 fire facility = $5,399, half the single-family rate. Separately, San Juan USD school fees apply from 500 sq ft (916-971-7073) and sewer connection charges are set by SASD/SRCSD (916-876-6100), which state law lets them charge proportionately for a new detached unit but not for a conversion or JADU. |
For a full line-item breakdown, see our Citrus Heights ADU cost guide. To confirm what you're allowed to build before you hire, review the Citrus Heights ADU rules (max detached size: Local option: 1,200 sq ft regardless of the primary home's size (§106.42.015.B.3.b), measured as interior livable space from the inside face of the exterior walls, excluding garages, porches and unfinished space (E.4). Above 800 sq ft the zone's lot coverage applies: 30% in RD-1 to RD-4, 50% in RD-5 to RD-15 (Table 2-4). State option: 800 sq ft (§106.42.015.C.1.a(3); Gov. Code §66323(a)(2)). No local standard may block an 800 sq ft unit with 4-ft side and rear setbacks (Gov. Code §66321(b)(3)).; owner-occupancy: Not required for an ADU. For a JADU, owner-occupancy (in either the JADU or the main home) is required only if the JADU shares a bathroom with the primary dwelling; a JADU with its own sanitation facilities, or one owned by a government agency, land trust or housing organization, is exempt (§106.42.015.D.2, tracking AB 1154 and Gov. Code §66333(b), effective January 1, 2026).).
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How to Vet an ADU Builder in Citrus Heights
- License: Confirm a current contractor's license in California and that it's in good standing. Ask for the license number and verify it with the state board.
- ADU-specific experience: Ask how many ADUs they've completed in or near Citrus Heights and request addresses or photos. ADU permitting and setbacks differ from a kitchen remodel.
- Portfolio & references: Get references from recent ADU clients and, if possible, visit a finished unit.
- Insurance: Verify general liability and workers' compensation coverage. Ask for a certificate of insurance.
- Written, detailed bid: Insist on an itemized, fixed-price or clearly-scoped bid — not a verbal estimate. It should state whether permits (Valuation-based (Master Fee Schedule, February 1, 2026): a $200,000 ADU pays about $2,933 building permit plus 65% plan check ($1,906), 6% General Plan and 4% technology surcharges, a 3.25% zone check and $94 issuance, roughly $5,300 in all; get a quote from Building at (916) 727-4760.), plan check (Building Division plan check at 65% of the building permit fee, due at submittal; extra review cycles cost $177 each and outside plan-check consultants beyond the second cycle are billed at cost (Master Fee Schedule). The free permit-ready plans are already approved by the Building Division, so only the site plan and site-specific items (utilities, solar, easements) are reviewed. Fire sprinklers are not required unless the primary home has them (§106.42.015.E.5). Each ADU is also subject to the state solar requirement, which may be met on the main house.), and impact fees (State law bars impact fees on an ADU of 750 sq ft of interior livable space or less and a JADU of 500 sq ft or less (Gov. Code §66311.5(c)). The city's Impact Fee Schedule (January 1, 2026) marks smaller ADUs EXEMPT and charges an ADU of 750-1,200 sq ft $1,467 multimodal + $3,045 park + $887 fire facility = $5,399, half the single-family rate. Separately, San Juan USD school fees apply from 500 sq ft (916-971-7073) and sewer connection charges are set by SASD/SRCSD (916-876-6100), which state law lets them charge proportionately for a new detached unit but not for a conversion or JADU.) are included.
- Permit handling: Confirm they manage Citrus Heights's permit process ("Ministerial building permit. §106.42.015.F (Ord. 2026-004) requires the city to process every ADU and JADU application ministerially within the timelines of Gov. Code §66310 et seq.; zoning compliance is checked inside the building-permit review (a 3.25% Planning zone-check fee), not through a separate hearing. Apply through the Citizen Access Portal. Applicants choose the local option (subsection B) or the state §66323 option (subsection C) on the application.", typically Not published by the city. State law requires a completeness notice within 15 business days and a decision within 60 days of a complete application where a home already exists, otherwise the application is deemed approved (Gov. Code §66317(a)(2)-(3)); §106.42.015.F binds the city to those timelines.) and who is responsible if revisions are required.
- Payment schedule: Avoid large upfront payments. A reasonable schedule ties payments to completed milestones.
Questions to Ask Before You Hire
- How many ADUs have you built in Citrus Heights in the last two years?
- Is your bid fixed-price, and what would trigger a change order?
- Are permits, plan check, and utility connection fees included?
- What's a realistic timeline, including permit review (Not published by the city. State law requires a completeness notice within 15 business days and a decision within 60 days of a complete application where a home already exists, otherwise the application is deemed approved (Gov. Code §66317(a)(2)-(3)); §106.42.015.F binds the city to those timelines.) and construction?
- Who is my point of contact and how are delays communicated?
- What warranty do you provide on workmanship?
- Can you share three recent California ADU client references?
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