Calculate the cost of building an accessory dwelling unit

BEGIN

What type of unit to build?

Studio, 400 ft², garage conversion
Studio, 400 ft², detached new construction
1 bedroom, 600 ft², detached new construction
2 bedroom, 750 ft², detached new construction
3 bedroom, 900 ft², detached new construction
3 bedroom, 1200 ft², detached new construction
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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.

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Is 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.

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Do you want Solar installation?

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Please provide contact details

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Please Confirm you information before show price

EDIT INFO SHOW PRICE

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

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