Adu Construction Service
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In Granada Hills, CA, ADU construction typically ranges from $320 to $480 per square foot, though prices can go as low as $163.79 per sq ft or as high as $600 per sq ft. The primary drivers of cost are the size and type of ADU (e.g., whether it's a garage conversion or a new detached unit) and the quality of finishes.
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Basic garage conversion or smaller ADU with standard finishes.
Detached ADU of moderate size with good quality materials and finishes.
Larger detached ADU with high-end finishes and custom designs.
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$2,063.68
Total Estimate Amount
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This is a Preliminary Estimate
This estimator provides a starting point based on typical jobs. Actual costs may vary based on site conditions, material availability, permit requirements, and other factors discovered during work. We recommend a site visit before providing final pricing to customers.
This estimate is based on typical job parameters. Review and adjust for your specific situation. Standard market rates for your region, mid-grade materials unless specified, standard business hours labor rates, typical job complexity without major complications, basic cleanup included in labor time.
Job complexity
Simple repairs cost less than full installations or replacements. Multi-step jobs requiring permits or inspections add to the total.
Material quality
Budget, mid-grade, and premium materials can swing the price significantly. Discuss options with your contractor to find the right balance.
Local labor rates
Labor costs vary by region, season, and demand. Urban areas and peak seasons typically have higher rates than rural or off-peak times.
Site conditions
Difficult access, older structures, code upgrades, or unexpected issues discovered during work can increase the final cost.
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Common questions about costs and estimates for this service.
Detached ADUs of 600-1,200 sq ft in California typically cost between $200,000 and $475,000.
The average cost for a 20x20 room addition in California ranges between $60,000 to $500,000 and up, depending on various factors like location, materials, and design complexity.
Yes, adding an ADU generally results in a property tax increase, but only for the newly constructed ADU portion, not the main home. California follows strict ADU reassessment rules, which protect homeowners from a full reassessment of their primary residence.
To build a 2,000 sq ft stick-built house in California, the cost can range from $800,000 to $1,200,000. For a modular build of the same size, the cost is typically between $400,000 to $600,000.
The average cost to build an ADU in the United States ranges significantly, typically falling between $60,000 and $225,000.