Building an ADU in Woodland, CA in 2026 costs roughly $65,000 to $130,000 for a garage conversion, $63,000 to $275,000 for a detached unit under 800 sq ft, and $296,000 to $440,000 for larger detached units (800 to 1,200 sq ft). Permit fees from the City of Woodland run $1,800 to $7,700 for building permits alone, with units over 800 sq ft triggering additional review fees. Units 750 sq ft and under pay zero impact fees under current California law. Realistic timeline from design to move in: 5 to 9 months for a garage conversion, 7 to 12 months for new detached construction.
Woodland and ADUs: What You're Working With
Woodland is a decent ADU market right now, mostly because the state has made it harder for cities to say no. Yolo County's rental vacancy rate sits around 3%. That's low, meaning rental demand is real and consistent. The commute to downtown Sacramento is about 20 miles, UC Davis is 15 miles west, and the University of California system drives steady tenant turnover in the broader region.
The complication in Woodland is the housing stock. The Downtown Woodland Historic District is on the National Register of Historic Places and covers roughly 370 acres of buildings with a period of significance stretching from 1866 to 1948. The residential neighborhoods surrounding downtown, from Main Street east toward the freeway, include a large share of homes built between the 1910s and 1940s. These homes carry the infrastructure surprises that come with that era: galvanized supply lines, undersized electrical panels, and in older blocks, early wiring systems that will need remediation before you add a new dwelling unit.
Gibson Ranch and Spring Lake are newer development areas to the southeast. They don't carry the same vintage infrastructure risk.
This guide covers the Woodland permit process, real permit fees from the city's own data, cost by ADU type, neighborhood specific factors, and the 2026 California law changes that affect your project.
Before reading further, get a rough estimate at SafewayQuickQuote.com. It takes about 2 minutes and doesn't require a contractor visit.
The Woodland Permit Process
California state law requires ministerial approval for code compliant ADUs. The City of Woodland must review your plans against a standard checklist, setbacks, height, lot coverage, fire safety, structural requirements, and either approve or issue corrections. They can't reject a conforming ADU because neighbors prefer not to have one.
Where to Apply
City of Woodland, Community Development Department
300 First Street, Woodland, CA 95695
Phone: (530) 661-5820
Building: cdd building@cityofwoodland.gov / Planning: CDD Planners@cityofwoodland.gov
Planning counter hours: Monday, Wednesday & Friday 9:00 AM, Noon and 1:30 to 3:00 PM; Tuesday & Thursday 9:00 AM, Noon. Appointments also available.
What Permit You'll Need, It Depends on Size
Woodland breaks ADU permit requirements into tiers based on unit size:
| ADU Size | Permits Required |
|---|---|
| 800 sq ft or less, under 16 ft, 4-ft setbacks | Building permit only |
| 801 to 1,000 sq ft | Building permit + ADU Permit |
| 1,001 to 1,200 sq ft | Building permit + Zoning Administrator Permit (ZAP) |
| JADU (attached, max 500 sq ft) | Building permit + recorded deed restriction |
The ZAP triggers public notice to properties within 300 feet of your lot, which is worth knowing if you're hoping for a quiet, low conflict approval process. Staying at or under 800 sq ft keeps your project on the simpler building permit only track.
Required Documentation
- Site plan with setbacks, lot coverage, utility routing, and drainage
- Floor plans, elevations, and sections
- Structural calculations stamped by a California licensed engineer (for detached ADUs)
- Title 24 energy compliance documentation
- Deed restriction recorded before permit issuance (JADUs)
The most common delay in Woodland ADU permitting is an incomplete application. The review clock doesn't start until your submittal is accepted as complete, a missing structural calculation or unsigned form can set you back weeks. Getting the package right on the first submission matters more than moving fast.
California state law caps ADU permit review at 60 days from a complete submittal. Plan on 3 to 4 months from design start to issued permit for a custom build.
Woodland ADU Rules: Size, Setbacks & Height (2026)
Woodland follows California's state minimums. Here's what applies to most lots:
Detached ADU
- Max size: Up to 1,200 sq ft (or 50% of the primary dwelling's living area, whichever is greater)
- Side/rear setbacks: 4 feet from property lines
- Height: Up to 16 feet by right for a one story detached unit
- Parking: No additional parking required when the lot is within ½ mile of a transit stop
Attached ADU
- Max size: Up to 50% of the primary dwelling's floor area (state minimums allow at least an 800 sq ft attached unit)
- Setbacks: Generally follow the primary dwelling's setbacks
Junior ADU (JADU)
- Max size: 500 sq ft, created from existing space within the primary home
- Requirement: Owner must occupy either the main home or the JADU
- Deed restriction: Must be recorded before building permit issues
Garage Conversion
- Typically the lowest cost path because the foundation, walls, and roof already exist
- Treated as ministerial in Woodland under the same state rules
- Replacement parking generally not required under current California law
Woodland ADU Pre Approved Plans: Coming Soon
Under California AB 1332, cities are required to offer a pre approved ADU plan program. Woodland has launched the program and is accepting designer submissions for plans between 150 to 800 sq ft, one story, detached. As of mid 2026, the public catalog of approved plans was listed as “coming soon” on the city's website, the submission process is open but the homeowner facing plan library hasn't launched yet.
Once it does, homeowners will be able to select a city approved design and skip the architectural plan check phase, similar to the Davis free pre approved ADU plan program that already offers three sizes (300, 565, and 740 sq ft). If you're planning a Woodland ADU in late 2026 or 2027, check cityofwoodland.gov, using a pre approved plan when available can trim weeks off your permit timeline.
Real Woodland ADU Costs and Permit Fees (2026)
These cost ranges come from the City of Woodland's own 2024 to 2025 permit data and reflect actual permitted projects. Construction costs vary significantly based on finish level, site conditions, and your home's existing infrastructure.
Garage Conversion / Attached ADU
| Size | Construction Cost | Building Permit Fees | Impact Fees |
|---|---|---|---|
| 352 to 730 sq ft conversion | $28,600 to $130,700 | $1,800 to $5,100 | $0 |
| Attached ADU (est.) | $65,000 to $150,000 | $2,500 to $5,500 | $0 if under 750 sq ft |
Detached ADU
| Size | Construction Cost | Building Permit Fees | Additional Fees |
|---|---|---|---|
| Under 800 sq ft | $63,200 to $275,000 | $3,200 to $5,700 | $0 impact fees |
| 801 to 1,000 sq ft | $296,400 to $440,000 | $7,100 to $7,700 | ~$7,300 impact fees + $492 ADU permit |
| 1,001 to 1,200 sq ft | ~$300,000+ | $5,800 | ~$15,000 impact fees + $3,510 ZAP fee |
The no impact fee threshold is 750 sq ft of interior livable space. That's the number California state law (SB 543) uses, and Woodland follows it. Designing your detached ADU to come in at or under 750 sq ft avoids the largest discretionary fees, and keeps you on the building permit only track if the unit is also under 800 sq ft.
Utility Connection Costs
Utility connections are the most commonly underestimated line item. If your detached ADU requires new water, sewer, or electrical laterals from the street, budget:
- Water/sewer new laterals: $5,000 to $18,000 depending on distance and depth
- Electrical service upgrade or sub panel: $2,500 to $6,000
- Gas stub (if applicable): $1,200 to $3,500
If your lot already has accessible utility connections, these costs drop substantially. Have your contractor assess this early, it's the most common budget surprise we see on Woodland ADU projects.
Older Home Cost Factors
For Woodland homes built before 1960, which covers a large portion of the Downtown area and the older residential neighborhoods between Main Street and East Street, budget for these infrastructure items before construction starts:
| Upgrade | Typical Cost |
|---|---|
| Galvanized supply line replacement (partial) | $3,500 to $7,000 |
| Galvanized supply line replacement (full) | $8,000 to $18,000 |
| Electrical panel upgrade (100A to 200A) | $2,500 to $4,500 |
| Knob-and-tube wiring remediation (partial) | $3,500 to $9,000 |
| Lead paint testing + remediation | $400 to $6,500 |
| Foundation reinforcement or leveling | $3,000 to $12,000 |
These aren't guaranteed, a 1940s home that's been well maintained may need none of them. But homes in and around Downtown Woodland's historic district often have at least one infrastructure surprise. A proper pre construction assessment prevents that surprise from landing mid project.
Woodland ADU Permit Fees and 2026 California Law
What SB 543 Means for Woodland Homeowners
California's SB 543 (effective 2026) codifies and strengthens the impact fee exemptions for smaller ADUs:
- ADUs under 500 sq ft: Fully exempt from school impact fees
- ADUs under 750 sq ft: Exempt from most development impact fees
For Woodland, that means units 750 sq ft and under owe no impact fees, the city's own permit data confirms $0 impact fees for projects in that range. For Woodland Joint Unified School District (WJUSD) school fees, the SB 543 exemption under 500 sq ft applies, removing what would otherwise be an additional per square foot charge.
AB 1154: The Condo Sale Pathway
AB 1154 (effective 2024) allows ADUs to be sold separately as condominiums in some circumstances. This isn't common practice yet, but it's meaningful for Woodland homeowners thinking about long term exit strategies, you could potentially sell the ADU as a separate unit rather than selling the entire property.
The 15 Business Day Intake Rule
State law also requires cities to respond to a submitted ADU application within 15 business days to notify the applicant whether the application is complete. If they don't respond in time, the application is “deemed complete” automatically. This rule prevents permit offices from letting applications sit, but in practice, submitting a clean, complete package is still faster than relying on procedural defaults.
Want a fast estimate on what your Woodland ADU would cost to build? Try the Safeway ADU cost calculator , it runs specific numbers based on your unit type and lot situation.
Neighborhood Cost Guide: Where You're Building Matters
Downtown Woodland / Historic Core
The Downtown Woodland Historic District covers homes from the 1860s through 1940s. The surrounding residential blocks, roughly the area bounded by Main Street, East Street, Dead Cat Alley, and the rail corridor, include a large share of pre 1950 bungalows and Craftsman style homes with one car detached garages.
For ADU purposes, this area is interesting for two reasons. First, the older garages are often good candidates for conversion, detached, already on their own foundation slab, with reasonable ceiling height. Second, the age of the primary home means higher probability of pre renovation infrastructure costs.
Typical ADU cost in Downtown/Historic area: $85,000 to $150,000 for a garage conversion (including likely electrical panel upgrade and possible plumbing work); $150,000 to $240,000 for a new detached ADU up to 750 sq ft with site work factored in.
Spring Lake / Southeast Woodland
Spring Lake is Woodland's newer planned community, developed primarily from the late 1990s through the 2010s in the southeast portion of the city. Homes here are newer construction with modern electrical panels, updated plumbing, and typically larger lot sizes than the historic core.
ADU projects in Spring Lake face fewer hidden cost risks but may run into HOA considerations depending on your specific subdivision. Check your CC&Rs before designing, some Spring Lake associations have architectural review requirements.
Typical ADU cost in Spring Lake: $70,000 to $120,000 garage conversion; $160,000 to $265,000 new detached unit under 800 sq ft.
Gibson Ranch Corridor
Gibson Ranch sits in the southeastern portion of the city, north of the Spring Lake district. The neighborhood includes a mix of 1980s era single family homes and some newer infill. Infrastructure is generally in good shape but older than Spring Lake.
Typical ADU cost in Gibson Ranch: $68,000 to $115,000 garage conversion; $150,000 to $250,000 new detached unit under 750 sq ft.
East/Southeast Woodland (Beamer Park, Cottonwood)
The areas east of Pioneer Avenue and south of Gibson Road include a range of construction vintages, some 1970s era ranch homes, some newer infill subdivisions. Lot sizes vary. This area tends to hit closer to mid range ADU costs without the historic district infrastructure premium.
Typical ADU cost in East/Southeast Woodland: $65,000 to $110,000 garage conversion; $140,000 to $245,000 new detached unit.
Timeline: From Design to Rental Income
| Phase | Garage Conversion | New Detached (under 800 sq ft) | New Detached (800 to 1,200 sq ft) |
|---|---|---|---|
| Design & engineering | 4 to 8 weeks | 8 to 14 weeks | 10 to 16 weeks |
| Permit review (complete app) | 4 to 8 weeks | 4 to 8 weeks | 6 to 10 weeks + public notice |
| Corrections/resubmittal | 0 to 4 weeks | 0 to 4 weeks | 0 to 4 weeks |
| Construction | 3 to 5 months | 4 to 6 months | 5 to 8 months |
| Total (typical) | 5 to 9 months | 7 to 11 months | 9 to 14 months |
The single biggest variable is the condition of your first permit submittal. A complete, clean application approved on the first round saves 4 to 6 weeks compared to one that goes through corrections. We handle the permit process end to end on Woodland projects, it's not a step you should navigate alone.
Rental Income: What to Expect in Woodland
Woodland's rental market is tight. Yolo County vacancy rates run around 3%, which keeps rents competitive and occupancy high. Average rents across all apartment sizes in Woodland hit $1,810/month as of 2026.
| ADU Type | Est. Monthly Rent | Annual Income | Rough Payback Period |
|---|---|---|---|
| Studio / JADU (300 to 450 sq ft) | $1,100 to $1,500 | $13,200 to $18,000 | 10 to 14 years |
| 1-bedroom ADU (550 to 650 sq ft) | $1,400 to $1,900 | $16,800 to $22,800 | 9 to 13 years |
| 2-bedroom ADU (750 to 900 sq ft) | $1,800 to $2,400 | $21,600 to $28,800 | 10 to 14 years |
Proximity to UC Davis (15 miles west) and Sacramento (20 miles east) drives tenant demand from both student housing overflow and commuters who prefer Woodland's lower rents. Woodland is also a county seat, Yolo County government employment creates steady, year round tenant demand that's less seasonal than a purely UC dependent market.
Property value impact: A well built ADU typically adds $120,000 to $220,000 to a Woodland home's resale value, though this varies substantially based on lot, unit size, and finish level.
Want to see what your specific Woodland ADU would cost? Run your numbers at SafewayQuickQuote.com for a free 2 minute estimate. No contractor visit, no sales pitch.
Frequently Asked Questions
Can the City of Woodland deny my ADU permit?
Not if it's code compliant. State law makes conforming ADUs ministerial, the city reviews against a checklist, not neighborhood preference. The only exception would be a project that genuinely doesn't meet code requirements, which is something a licensed contractor resolves at the design stage.
What are the impact fees for an ADU in Woodland?
Units 750 sq ft and under pay zero impact fees under California law. Units from 801 to 1,000 sq ft trigger about $7,300 in impact fees plus a $492 ADU Permit fee. Units from 1,001 to 1,200 sq ft add roughly $15,000 in impact fees plus a $3,510 Zoning Administrator Permit fee. Building permits alone run $1,800 to $7,700 depending on size and project valuation.
How much does a detached ADU cost in Woodland?
City of Woodland permit data from 2024 to 2025 shows detached ADUs under 800 sq ft costing $63,200 to $275,000 in construction costs, with building permit fees of $3,200 to $5,700. Larger units (800 to 1,200 sq ft) ran $296,400 to $440,000 in construction with fees up to $7,700 plus impact fees. Add utility connection costs, potentially $5,000 to $18,000 if new laterals are needed.
Does Woodland have pre approved ADU plans?
Woodland launched a Pre Approved ADU Plan Program under AB 1332. The program is accepting designer submissions for one story detached units between 150 to 800 sq ft. As of mid 2026, the public plan catalog was marked “coming soon.” Once live, homeowners can use approved plans to skip the architectural plan check phase. Check cityofwoodland.gov for current status before starting your design.
How long does an ADU permit take in Woodland?
California law caps review at 60 days from a complete application. In practice, plan 3 to 4 months from design start to issued permit for a standard custom ADU. Construction adds 3 to 6 months depending on type. Total timeline: 5 to 9 months for a garage conversion, 7 to 12 months for new detached construction.
Do older Woodland homes cost more to build an ADU?
Yes, often. The Downtown Woodland Historic District contains homes from 1866 to 1948, and the surrounding residential blocks include a large share of pre 1950 construction. These homes frequently carry galvanized plumbing, undersized 100 amp panels, and early wiring systems. Budget $4,000 to $18,000 in infrastructure upgrades as a contingency, the actual amount depends on what's found during the contractor's pre project assessment.
What rental income can I expect from a Woodland ADU?
Woodland's average rent is around $1,810/month across all apartment sizes. A 1 bedroom ADU typically rents for $1,400 to $1,900/month; a 2 bedroom for $1,800 to $2,400. Yolo County's 3% vacancy rate keeps occupancy high. Woodland's commuter position between UC Davis and Sacramento makes it a stable rental market year round.
More ADU Guides
- Davis ADU Guide: Permits, Costs & Free Pre Approved Plans (2026)
- Sacramento ADU Guide: Permits, Costs & Rental Income (2026)
- California's 2026 ADU Laws: What Sacramento & Yolo County Homeowners Need to Know
Build Your Woodland ADU With Safeway Construction
We're a licensed California general contractor (CA Lic. #1066117) with 20+ years of residential experience and a 5.0 star Google rating. We handle ADU projects from design coordination through final inspection, permit applications, contractor management, and code compliance included.