Serving San Diego: Bringing The Green To Your Backyard
Design, Permit, And Construction Management For Your ADU In California
From Concept to Construction in Less Than 11 Months
Organized and Planned Construction of Your ADU in California
ADU Construction Types
What Options Do I Have for an ADU in California?
Stand-alone Unit
Add up to 1200 sqft as standalone structure on a new foundation for your California ADU.
Addition
Build on an addition of up to 1200 sqft for your California ADU.
Garage Conversion
Turn your California garage into an extra unit with living space.
ADU CALCULATOR
Calculate the cost of building an accessory dwelling unit
BEGINWhat type of unit to build?
Include separate water and gas?
If you plan to rent out your ADU, you may want the utilities on separate meters, so your tenant's utility bills will be separate from yours.
NEXTIs home located on hillside?
Construction on slopes or hillside requires additional design and site prep work, like grading the surface or providing additional support for the structure. be separate from yours.
NEXT
We estimate that your project will cost with a likely range of
Below is a detailed breakdown of this estimate. You can change the ADU details to see how the estimate changes.
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$13,000 | $13,000 | $13,000 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$77,350 | $91,000 | $104,650 |
Contingency
|
$15,470 | $18,200 | $20,930 |
Total cost | $107,320 | $123,700 | $140,080 |
Cost per square foot | $268 | $309 | $350 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$15,500 | $15,500 | $15,500 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$116,688 | $133,750 | $150,813 |
Contingency
|
$23,338 | $26,750 | $30,163 |
Total cost | $172,026 | $199,500 | $227,976 |
Cost per square foot | $430 | $499 | $570 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$13,000 | $13,000 | $13,000 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$97,350 | $111,000 | $124,650 |
Contingency
|
$19,470 | $22,200 | $24,930 |
Total cost | $131,320 | $147,700 | $164,080 |
Cost per square foot | $328 | $369 | $410 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$13,000 | $13,000 | $13,000 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$97,350 | $111,000 | $124,650 |
Contingency
|
$19,470 | $22,200 | $24,930 |
Total cost | $146,320 | $169,700 | $194,080 |
Cost per square foot | $366 | $424 | $485 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$15,500 | $15,500 | $15,500 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$116,688 | $133,750 | $150,813 |
Contingency
|
$23,338 | $26,750 | $30,163 |
Total cost | $157,026 | $177,500 | $197,976 |
Cost per square foot | $393 | $444 | $495 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$15,500 | $15,500 | $15,500 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$96,688 | $113,750 | $130,812 |
Contingency
|
$19,338 | $22,750 | $26,163 |
Total cost | $133,016 | $153,500 | $173,975 |
Cost per square foot | $333 | $384 | $435 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$15,500 | $15,500 | $15,500 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$96,688 | $113,750 | $130,812 |
Contingency
|
$19,338 | $22,750 | $26,163 |
Total cost | $148,026 | $175,500 | $203,975 |
Cost per square foot | $370 | $439 | $510 |
Low estimate | Medium estimate | High estimate | |
Designs and permitting fees
|
$13,000 | $13,000 | $13,000 |
Structural engineering report
|
$1,000 | $1,000 | $1,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$77,350 | $91,000 | $104,650 |
Contingency
|
$15,470 | $18,200 | $20,930 |
Total cost | $122,320 | $145,700 | $170,080 |
Cost per square foot | $306 | $364 | $425 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$14,000 | $14,000 | $14,000 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$119,000 | $140,000 | $161,000 |
Contingency
|
$11,900 | $14,000 | $16,100 |
Total cost | $148,900 | $172,000 | $195,100 |
Cost per square foot | $372 | $430 | $488 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,500 | $16,500 | $16,500 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$168,750 | $195,000 | $221,250 |
Contingency
|
$16,875 | $19,500 | $22,125 |
Total cost | $221,125 | $257,000 | $293,875 |
Cost per square foot | $553 | $643 | $735 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$14,000 | $14,000 | $14,000 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$139,000 | $160,000 | $181,000 |
Contingency
|
$13,900 | $16,000 | $18,100 |
Total cost | $170,900 | $194,000 | $217,100 |
Cost per square foot | $427 | $485 | $543 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$14,000 | $14,000 | $14,000 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$139,000 | $160,000 | $181,000 |
Contingency
|
$13,900 | $16,000 | $18,100 |
Total cost | $185,900 | $216,000 | $247,100 |
Cost per square foot | $465 | $540 | $618 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,500 | $16,500 | $16,500 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$168,750 | $195,000 | $221,250 |
Contingency
|
$16,875 | $19,500 | $22,125 |
Total cost | $206,125 | $235,000 | $263,875 |
Cost per square foot | $515 | $588 | $660 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,500 | $16,500 | $16,500 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$148,750 | $175,000 | $201,250 |
Contingency
|
$14,875 | $17,500 | $20,125 |
Total cost | $184,125 | $213,000 | $241,875 |
Cost per square foot | $460 | $533 | $605 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,500 | $16,500 | $16,500 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$148,750 | $175,000 | $201,250 |
Contingency
|
$14,875 | $17,500 | $20,125 |
Total cost | $199,125 | $235,000 | $271,875 |
Cost per square foot | $498 | $588 | $680 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$14,000 | $14,000 | $14,000 |
Structural engineering report
|
$1,500 | $1,500 | $1,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$119,000 | $140,000 | $161,000 |
Contingency
|
$11,900 | $14,000 | $16,100 |
Total cost | $163,900 | $194,000 | $225,100 |
Cost per square foot | $410 | $485 | $563 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$15,000 | $15,000 | $15,000 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$174,250 | $205,000 | $235,750 |
Contingency
|
$17,425 | $20,500 | $23,575 |
Total cost | $211,175 | $245,000 | $278,825 |
Cost per square foot | $352 | $408 | $465 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$17,500 | $17,500 | $17,500 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$237,813 | $276,250 | $314,687 |
Contingency
|
$23,781 | $27,625 | $31,469 |
Total cost | $298,594 | $347,875 | $398,155 |
Cost per square foot | $498 | $580 | $664 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$15,000 | $15,000 | $15,000 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$194,250 | $225,000 | $255,750 |
Contingency
|
$19,425 | $22,500 | $25,575 |
Total cost | $233,175 | $267,000 | $300,825 |
Cost per square foot | $389 | $445 | $501 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$15,000 | $15,000 | $15,000 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$194,250 | $225,000 | $255,750 |
Contingency
|
$19,425 | $22,500 | $25,575 |
Total cost | $248,175 | $289,000 | $330,825 |
Cost per square foot | $414 | $482 | $551 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$17,500 | $17,500 | $17,500 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$237,813 | $276,250 | $314,687 |
Contingency
|
$23,781 | $27,625 | $31,469 |
Total cost | $283,594 | $325,875 | $368,156 |
Cost per square foot | $473 | $543 | $614 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$17,500 | $17,500 | $17,500 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$217,813 | $256,250 | $294,687 |
Contingency
|
$21,781 | $25,625 | $29,469 |
Total cost | $261,594 | $303,875 | $346,156 |
Cost per square foot | $436 | $506 | $577 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$17,500 | $17,500 | $17,500 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$217,813 | $256,250 | $294,687 |
Contingency
|
$21,781 | $25,625 | $29,469 |
Total cost | $276,594 | $325,875 | $376,156 |
Cost per square foot | $461 | $543 | $627 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$15,000 | $15,000 | $15,000 |
Structural engineering report
|
$2,000 | $2,000 | $2,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$174,250 | $205,000 | $235,750 |
Contingency
|
$17,425 | $20,500 | $23,575 |
Total cost | $226,175 | $267,000 | $308,825 |
Cost per square foot | $377 | $445 | $515 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,000 | $16,000 | $16,000 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$212,500 | $250,000 | $287,500 |
Contingency
|
$21,250 | $25,000 | $28,750 |
Total cost | $254,750 | $296,000 | $337,250 |
Cost per square foot | $340 | $395 | $450 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,500 | $18,500 | $18,500 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$285,625 | $332,500 | $379,375 |
Contingency
|
$28,563 | $33,250 | $37,938 |
Total cost | $352,688 | $411,250 | $470,813 |
Cost per square foot | $470 | $548 | $628 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,000 | $16,000 | $16,000 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$232,500 | $270,000 | $307,500 |
Contingency
|
$23,250 | $27,000 | $30,750 |
Total cost | $276,750 | $318,000 | $359,250 |
Cost per square foot | $369 | $424 | $479 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,000 | $16,000 | $16,000 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$232,500 | $270,000 | $307,500 |
Contingency
|
$23,250 | $27,000 | $30,750 |
Total cost | $291,750 | $340,000 | $389,250 |
Cost per square foot | $389 | $453 | $519 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,500 | $18,500 | $18,500 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$285,625 | $332,500 | $379,375 |
Contingency
|
$28,563 | $33,250 | $37,938 |
Total cost | $337,688 | $389,250 | $440,813 |
Cost per square foot | $450 | $519 | $588 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,500 | $18,500 | $18,500 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$265,625 | $312,500 | $359,375 |
Contingency
|
$26,563 | $31,250 | $35,938 |
Total cost | $315,688 | $367,250 | $418,813 |
Cost per square foot | $421 | $490 | $558 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,500 | $18,500 | $18,500 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$265,625 | $312,500 | $359,375 |
Contingency
|
$26,563 | $31,250 | $35,938 |
Total cost | $330,688 | $389,250 | $448,813 |
Cost per square foot | $441 | $519 | $598 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$16,000 | $16,000 | $16,000 |
Structural engineering report
|
$2,500 | $2,500 | $2,500 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$212,500 | $250,000 | $287,500 |
Contingency
|
$21,250 | $25,000 | $28,750 |
Total cost | $269,750 | $318,000 | $367,250 |
Cost per square foot | $360 | $424 | $490 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$250,750 | $295,000 | $339,250 |
Contingency
|
$25,075 | $29,500 | $33,925 |
Total cost | $299,325 | $348,000 | $396,675 |
Cost per square foot | $333 | $387 | $441 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$333,438 | $388,750 | $444,063 |
Contingency
|
$33,344 | $38,875 | $44,406 |
Total cost | $407,782 | $475,625 | $544,469 |
Cost per square foot | $453 | $528 | $605 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$270,750 | $315,000 | $359,250 |
Contingency
|
$27,075 | $31,500 | $35,925 |
Total cost | $321,325 | $370,000 | $418,675 |
Cost per square foot | $357 | $411 | $465 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$270,750 | $315,000 | $359,250 |
Contingency
|
$27,075 | $31,500 | $35,925 |
Total cost | $336,325 | $392,000 | $448,675 |
Cost per square foot | $374 | $436 | $499 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$333,438 | $388,750 | $444,063 |
Contingency
|
$33,344 | $38,875 | $44,406 |
Total cost | $392,782 | $453,625 | $514,469 |
Cost per square foot | $436 | $504 | $572 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$313,438 | $368,750 | $424,063 |
Contingency
|
$31,344 | $36,875 | $42,406 |
Total cost | $370,782 | $431,625 | $492,469 |
Cost per square foot | $412 | $480 | $547 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$313,438 | $368,750 | $424,063 |
Contingency
|
$31,344 | $36,875 | $42,406 |
Total cost | $385,782 | $453,625 | $522,469 |
Cost per square foot | $429 | $504 | $581 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$250,750 | $295,000 | $339,250 |
Contingency
|
$25,075 | $29,500 | $33,925 |
Total cost | $314,325 | $370,000 | $426,675 |
Cost per square foot | $349 | $411 | $474 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$347,425 | $367,000 | $386,575 |
Contingency
|
$25,075 | $29,500 | $33,925 |
Total cost | $396,000 | $420,000 | $444,000 |
Cost per square foot | $330 | $350 | $370 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$430,113 | $460,750 | $491,388 |
Contingency
|
$33,344 | $38,875 | $44,406 |
Total cost | $504,457 | $547,625 | $591,794 |
Cost per square foot | $420 | $456 | $493 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$367,425 | $387,000 | $406,575 |
Contingency
|
$27,075 | $31,500 | $35,925 |
Total cost | $418,000 | $442,000 | $466,000 |
Cost per square foot | $348 | $368 | $388 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$367,425 | $387,000 | $406,575 |
Contingency
|
$27,075 | $31,500 | $35,925 |
Total cost | $433,000 | $464,000 | $496,000 |
Cost per square foot | $361 | $387 | $413 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$430,113 | $460,750 | $491,388 |
Contingency
|
$33,344 | $38,875 | $44,406 |
Total cost | $489,457 | $525,625 | $561,794 |
Cost per square foot | $408 | $438 | $468 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Hard construction costs
|
$410,113 | $440,750 | $471,388 |
Contingency
|
$31,344 | $36,875 | $42,406 |
Total cost | $467,457 | $503,625 | $539,794 |
Cost per square foot | $390 | $420 | $450 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$20,500 | $20,500 | $20,500 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$410,113 | $440,750 | $471,388 |
Contingency
|
$31,344 | $36,875 | $42,406 |
Total cost | $482,457 | $525,625 | $569,794 |
Cost per square foot | $402 | $438 | $475 |
Low estimate | Medium estimate | High estimate | |
Boundary survey
|
$2,000 | $2,000 | $2,000 |
Designs and permitting fees
|
$18,000 | $18,000 | $18,000 |
Structural engineering report
|
$3,000 | $3,000 | $3,000 |
Title 24 energy calculations
|
$500 | $500 | $500 |
Solar installation
|
$15,000 | $22,000 | $30,000 |
Hard construction costs
|
$347,425 | $367,000 | $386,575 |
Contingency
|
$25,075 | $29,500 | $33,925 |
Total cost | $411,000 | $442,000 | $474,000 |
Cost per square foot | $343 | $368 | $395 |
TAF Calculation
This is estimate calculation form
Frequently Asked Questions
Why Is It Important to Get Help with My ADU in California?
Many of our clients come to us with rough ADU ideas of what they want that may or may not be feasible to build. Many clients are not familiar with the approval process or assume that their property is unsuitable for an ADU. Other clients want to build ADUs that take full advantage of the square feet limits. Whatever your ADU concerns or questions may be, we are here to help with your projects.
If you are concerned about ADU impact fees, we can do some calculations to figure out how to fit them within your budget. You can speak to one of our ADU consultants to better understand the ADU building process. We help you through the entire process to make your ADU project seamless.
Are ADUs Legal in California?
ADUs, also known as “granny flats,” in California is part of an initiative managed by the California Department of Housing and Community Development to alleviate California’s lack of affordable dwelling opportunities. ADU’s were introduced to the state assembly and then passed and signed by the Governor’s Office to legally allow homeowners to build ADU’s. ADU state laws go through a regulatory process ultimately enforced by local agencies of cities and counties once they are implemented.
How Large An ADU Can I Build?
What Is A San Diego Accessory Dwelling Unit?
In the past, an ADU was more likely to be called a granny flat in San Diego. In other parts of the country, the name “mother-in-law suite” is more commonly used. These structures are not part of the main floor plan, and they are more likely to be built as add-ons; in some cases, however, accessory dwelling unit builders are being contracted at the same time the main structure goes up. Prefab granny flats in San Diego are becoming more popular than swimming pools because they can provide an affordable housing solution. The bottom line for homeowners who hire ADU contractors is that they are looking to increase the value and utility of their properties.
How Many ADU's Can I Build?
How Much Does It Cost to Build an ADU in California?
We get this question a lot, and the answer will depend on various factors. Suppose you have seen ADU costs quoted in a special report broadcast by NBC 7 or published by the San Diego Union-Tribune. In that case, you probably know that the average cost per square foot starts around $1200, but this is based on pre-designed plans, standard materials, and zero extra features to boost property value.
ADU projects requiring extensive customization and luxurious extras can easily cost more than $200 per square foot if they need custom architectural plans, quality construction materials, and amenities. Sundecks, EV charging points, smart home automation systems with appliances, rooftop solar panels, gourmet kitchens, natural stone worktops, exotic hardwood floors, and other luxuries are all available for an additional fee. We can help you calculate all the costs before the designing process to avoid any hidden fees.
The style of the main property predominantly influences the design and build of an ADU project. A Mediterranean revival home near the beach, for example, requires more than a prefab ADU; in this situation, it is best to fit the architectural style of the property, thus raising the project’s cost. Overall, the cost of an ADU will vary. To get a better estimate of what it might cost, contact Organic ADU to get started.
What Is A Junior ADU?
Where On My Lot Can I Build?
How To Find An ADU Specialist Near Me?
What Are The Benefits Of An ADU in California?
As a seasoned ADU contractor in San Diego, Organic ADU is the kind of specialist you want to retain for your project. We take pride in completing ADUs that people wish to move into within their property. Unlike other contractors who push prefab models and stick only to the pre-approved ADU building plans provided by the county, we work closely with homeowners to ensure that they can incorporate their vision and ideas into the project.
We are known to think of everything and pay close attention to detail. If you live in a subdivision where there are deed restrictions in architectural styles, we can undoubtedly comply. Some of our clients are so pleased with the results that they never end up renting the ADU; instead, they keep it for themselves or accommodate loved ones on extended visits.