Underbuilt-Lot & Teardown Screener
The best redevelopment plays are hiding in plain sight: small, older homes on lots zoned for far more house than sits on them today. This screener scores active Silicon Valley listings against each city's floor-area limit to surface the most underbuilt lots MLS filters never show.
Envelope vs. Existing
We estimate each city's allowable floor area from its zoning rule and compare it to the existing home to measure unused headroom.
Expansion Upside
Low utilization on a sizable lot means room to add square footage, or, for older homes, a scrape-and-rebuild.
Sourced & Conservative
FAR rules are curated per city with code citations; uncurated cities use a flagged conservative estimate, never a false signal.
Most Underbuilt Listings
Filters
Zoning & Risk
$1,599,000
722 Armanini Ave, Santa Clara
$2,730,000
2809 Ponderosa Way, Santa Clara
$1,998,000
2324 Montezuma Dr, Campbell
$3,280,000
6146 Mancuso St, San Jose
$3,898,000
6942 Calabazas Creek Cir, San Jose
$2,499,998
685 Oak Park Way, Redwood City
$1,998,000
4821 Bannock Cir, San Jose
$7,750,000
11837 Upland Way, Cupertino
$749,950
323 N 18th St, San Jose
$1,998,000
1992 Montemar Way, San Jose
$6,998,000
14810 Farwell Ave, Saratoga
$2,850,000
738 Fairfield Rd, Burlingame
$5,998,000
18625 Sage Ct, Saratoga
$5,500,000
19544 Sky Oaks Way, Los Gatos
$1,800,000
230 Park Ave, San Carlos
$2,198,000
1778 Chevalier Dr, San Jose
$1,999,000
2324 Cheshire Way, Redwood City
$2,988,888
6448 Bollinger Rd, San Jose
$868,000
410 Josefa St Unit 1, San Jose
$2,995,000
300 DE Anza Ave, San Carlos
$1,950,000
183 Thompson Sq, Mountain View
$5,488,000
320 Arlington Way, Menlo Park
$1,798,800
1385 Kotenberg Ave, San Jose
$489,000
287 Tradewinds Dr Apt 11, San Jose
$3,890,000
969 Franquette Ave, San Jose
$1,749,000
6055 Foothill Glen Dr, San Jose
$2,550,000
402 Sylvan Ave, Mountain View
$3,825,000
1232 Capuchino Ave, Burlingame
$2,488,000
2363 Venndale Ave, San Jose
$1,499,000
4786 Lago Vista Cir, San Jose
$9,880,000
19 Farm Ln, Hillsborough
$1,575,000
5352 Silver Garden Way, San Jose
$1,195,000
923 and 925 Paula St, San Jose
$2,999,000
1188 Dresden Way, San Jose
$1,700,000
391 Charles Morris Ter, Sunnyvale
$2,295,000
19 Beach Grass Rd, Nantucket
$2,295,000
19 Beach Grass Rd, Nantucket
$3,695,000
12 Shell St, Nantucket
$1,900,000
4 Christian Ct, Belmont
$388,000
Hudson St Unit 209, Redwood City
$1,888,000
131 Rockridge Rd, San Carlos
$2,995,000
3307 Adelaide Way, Belmont
$1,499,000
452 Heatherbray Ct, San Jose
$2,298,000
2507 Hastings Dr, Belmont
$1,649,000
4308 Edison St, San Mateo
$2,698,000
886 Heather Dr, San Carlos
$898,000
655 Martinique Ct, San Jose
$1,890,000
4532 Brunswick Ave, San Jose
$1,349,000
553 Laswell Ave, San Jose
$2,698,888
1739 Lexington Ave, San Mateo
$3,200,000
2719 All View Way, Belmont
$3,790,000
16342 Alexander Ave, Monte Sereno
$1,999,999
5011 Doyle Rd, San Jose
$1,899,000
1709 Four Oaks Rd, San Jose
$1,599,888
6418 Vegas Dr, San Jose
$1,099,000
206 Grayson Ter, San Jose
$1,975,000
1622 Pecan Ct, Redwood City
$6,995,000
7 Van Fleet Cir, Nantucket
$768,000
30 E Julian St Unit 203, San Jose
$6,800,000
13415 Country Way, Los Altos Hills
$3,850,000
1111 Pine Ave, San Jose
$1,250,000
928 Wright Ave Apt 1103, Mountain View
$1,498,000
1681 Shore Pl Unit 3, Santa Clara
$1,100,000
1962 El Dorado Ave, San Jose
$1,499,000
5393 Chesbro Ave, San Jose
$798,000
882 S Almaden Ave Unit 2, San Jose
$850,000
131 Union Ave Unit H, Campbell
$2,600,000
723 Hamilton Ave, Palo Alto
$885,000
718 Millich Dr Unit B, Campbell
$2,498,000
1147 Cotswald Ct, Sunnyvale
$2,898,000
751 27th Ave, San Mateo
$3,350,000
2132 Jonathan Ave, San Jose
$1,699,999
3198 Knights Bridge Rd, San Jose
$1,999,000
102 Dalma Dr, Mountain View
$2,900,000
788 Sequoia Ave, San Mateo
$768,000
1898 Meridian Ave Unit 48, San Jose
$2,698,000
346 Cerrito Ave, Redwood City
$778,000
1400 Bowe Ave Apt 806, Santa Clara
$2,988,888
14120 Alta Vista Ave, Saratoga
$999,000
984 Goodacre Ln, San Jose
$2,398,000
417 Palomar Dr, Redwood City
$1,998,000
6401 Bollinger Rd, Cupertino
$3,200,000
2525 Armstrong Pl, Santa Clara
$2,088,000
646 Bucher Ave, Santa Clara
$3,380,000
3492 Murdoch Ct, Palo Alto
$1,495,000
691 Albion Dr, San Jose
$1,588,000
420 Voelker Dr, San Mateo
$1,099,999
720 Duncanville Ct, Campbell
$1,850,000
2867 Hostetter Rd, San Jose
$1,288,000
2341 Ticonderoga Dr, San Mateo
$1,150,000
240 N Fremont St, San Mateo
$3,998,000
35 Silk Tree Pl, Hillsborough
$2,450,000
20 Robin Way, San Carlos
$2,295,000
2164 Brittan Ave, San Carlos
$2,888,000
256 E Charleston Rd, Palo Alto
$3,898,000
897 Newell Rd, Palo Alto
$7,495,000
121 Leland Ave, Menlo Park
$1,198,000
880 Sherman Oaks Dr, San Jose
$5,295,000
2051 Oakley Ave, Menlo Park
$4,398,000
109 Lyell St, Los Altos
$719,000
6940 Gregorich Dr Unit E, San Jose
$5,175,000
2065 Oakley Ave, Menlo Park
$7,895,000
419 Los Pajaros Ct, Los Altos
$1,349,000
5975 Tuscarora Ct, San Jose
$1,888,000
26 Big Tree Rd, Woodside
$1,700,000
1637 Grant Rd, Mountain View
$815,500
4882 Cherrythorne Ln, San Jose
$3,588,888
22184 Via Camino Ct, Cupertino
$1,690,000
1287 Thorn Valley Ct, San Jose
$790,000
2200 Agnew Rd Apt 318, Santa Clara
$1,599,950
1832 Calistoga Dr, San Jose
$7,488,000
1219 Portland Ave, Los Altos
$665,000
5452 Colony Field Dr, San Jose
$735,000
4157 George Ave Apt 2, San Mateo
$2,350,000
3519 Toomey Pl, Santa Clara
$1,199,999
1913 Kirkland Ave, San Jose
$1,399,000
5762 Cohasset Way, San Jose
$3,875,000
2045 Helena Way, Redwood City
$3,349,000
66 Club Dr, San Carlos
$1,398,888
451 Santa Mesa Dr, San Jose
$1,799,888
2253 Maywood Ave, San Jose
$2,598,000
290 W Charleston Rd, Palo Alto
$2,100,000
2534 Dumbarton Ave, San Jose
$1,349,000
132 Llano De Los Robles Ave, San Jose
$570,000
2465 Sequester Ct, San Jose
$988,800
4175 Renaissance Dr Apt 4, San Jose
$938,000
1931 Nevets Ln, San Jose
$1,788,888
1695 Wickham Rd, San Jose
$5,588,888
13204 Wright Way, Los Altos Hills
$1,498,000
411-413 N Central Ave, Campbell
$2,988,000
7102 Golden Gate Dr, San Jose
$448,000
1060 S 3rd St Apt 115, San Jose
$1,588,000
5308 Gatewood Ln, San Jose
$1,998,000
3330 Cabrillo Ave, Santa Clara
$1,988,888
664 N El Camino Real, San Mateo
$1,780,000
143-145 N Humboldt St, San Mateo
$1,998,000
3851 Blackford Ave, San Jose
$1,680,000
2992 Vivian Ln, San Jose
$885,000
3578 Rambla Pl Apt 316, Santa Clara
$1,880,000
393 Beemer Ave, Sunnyvale
$2,388,000
203 Margarita Ave, Palo Alto
$1,835,000
912 Connie Dr, Campbell
$1,699,888
2185 Fieldstone Ct, San Jose
$1,948,000
1128 Oakmont Dr, San Jose
$2,090,000
3982 Hamilton Park Dr, San Jose
$1,099,900
4230 Erie Ct, Santa Clara
$2,499,888
1534 S Blaney Ave, San Jose
$1,399,999
2158 Capitol Park Ct, San Jose
$2,395,000
6474 Camelia Dr, San Jose
$1,988,888
3362 Cropley Ave, San Jose
$2,999,888
549 Emerald Ave, San Carlos
$1,992,273
2273 Stratford Dr, San Jose
$1,499,000
1873 Camargo Dr, San Jose
$2,698,000
826 W Olive Ave, Sunnyvale
$1,395,000
641 Waltermire St, Belmont
$1,826,900
1051 Harrison St, Santa Clara
$1,553,700
37 Weepingridge Ct, San Mateo
$1,599,000
4038 Jarvis Ave, San Jose
$2,698,000
1037 Blair Ave, Sunnyvale
$699,000
2250 Monroe St Apt 109, Santa Clara
$2,699,000
995 Warwick Ct, Sunnyvale
$998,000
526 Leigh Ave, San Jose
$3,850,000
2311 Cottle Ave, San Jose
$1,548,000
612 Cayuga Dr, San Jose
$1,649,999
398 N Whisman Rd, Mountain View
$2,899,998
1001 Shadow Brook Dr, San Jose
$2,698,000
565 Carrick Ct, Sunnyvale
$1,448,888
7116 Cerro Crest Dr, San Jose
$1,899,800
3497 Golden State Dr, Santa Clara
$990,000
2188 Beech Cir, San Jose
$1,450,000
6092 Vincent Ct, San Jose
$4,250,000
432 Virginia Ave, Campbell
$1,429,000
897 Windsor Hills Cir, San Jose
$1,468,888
281 Sposito Cir, San Jose
$3,995,000
11450 Summit Wood Rd, Los Altos Hills
$1,199,000
456 S 2nd St, San Jose
$619,999
208 Watson Dr Apt 3, Campbell
$1,990,000
3475 Butcher Dr, Santa Clara
$1,120,000
855 N 16th St, San Jose
$1,899,000
5315 Calderwood Ln, San Jose
$2,298,000
750 San Clemente Way, Mountain View
$1,749,000
1457 Shaffer Dr, San Jose
$3,280,000
1512 Alturas Dr, Burlingame
$1,068,000
2695 Villa Cortona Way, San Jose
$4,950,000
7 Airport Rd, Nantucket
$4,950,000
1 Airport Rd, Nantucket
$3,998,000
14942 Larga Vista Dr, Los Gatos
$2,205,000
827 Sevely Dr, Mountain View
$3,788,888
1768 Laurentian Way, Sunnyvale
$1,385,000
5795 Coralwood Way, San Jose
$1,299,000
977 Ivory Creek Dr, San Jose
$449,000
872 Catkin Ct, San Jose
$2,899,000
1473 Lesher Ct, San Jose
$2,328,000
4 Warren Rd, San Mateo
$509,000
2695 Somerset Park Cir, San Jose
$3,300,000
1667 Glenrock Ct, San Jose
$1,388,888
1771 Hillebrant Pl, Santa Clara
$3,490,000
5441 Castle Manor Dr, San Jose
$2,380,000
947 Glennan Dr, Redwood City
$1,788,000
104 Edelen Ave, Los Gatos
$2,498,000
679 Torreya Ave, Sunnyvale
$3,998,000
18823 Casa Blanca Ln, Saratoga
$7,995,000
4 Wood Hallow Rd, Nantucket
$848,000
4567 Powderborn Ct, San Jose
$5,500,000
4 Golf View Dr, Nantucket
$1,999,900
1793 Stokes St, San Jose
$595,000
311 Tradewinds Dr, San Jose
$3,498,000
239 Loma Alta Ave, Los Gatos
$1,998,000
3718 Benton St, Santa Clara
$2,899,000
10620 Glenview Ave, Cupertino
$2,288,000
1657 Nightingale Ave, Sunnyvale
$1,899,000
740 Alameda De Las Pulgas, Redwood City
$2,849,000
1046 Sonoma Ave, Menlo Park
$1,459,000
1503 Alta Glen Dr, San Jose
$1,288,000
1992 N Star Cir, San Jose
$3,695,000
407 University Ave, Los Gatos
$4,888,000
18922 Congress Junction Ct, Saratoga
$1,750,000
2622 Garfield St, San Mateo
$2,358,000
245 El Cajon Way, Los Gatos
$1,995,000
68 Pierce Ave, San Jose
$1,892,000
905 Sheila Ct, Campbell
$5,998,000
2886 Emerson St, Palo Alto
$1,830,000
1955 Brittan Ave, San Carlos
$1,050,000
2352 Brushglen Way, San Jose
$4,150,000
20696 Hanford Dr, Cupertino
$1,799,000
22963 Longdown Rd, Cupertino
$1,600,000
470 Mountain Laurel Ct, Mountain View
$2,800,000
164 Madaket Rd, Nantucket
$1,750,000
11A Meadow Ln, Nantucket
$3,200,000
162 Madaket Rd, Nantucket
$3,695,000
70 Hooper Farm Rd, Nantucket
$9,800,000
20 Boulevarde, Nantucket
$1,729,900
1678 Westhaven Dr, San Jose
$1,785,000
1361 Cabrillo Ave, San Jose
$1,825,000
1257 Sabal Dr, San Jose
$2,548,000
5063 Forest View Dr, San Jose
$729,999
801 S Winchester Blvd Apt 1304, San Jose
$1,215,000
1253 Singletary Ave, San Jose
$2,699,999
1286 Mildred Ave, San Jose
$2,999,900
1348 Winona Dr, San Jose
$1,800,000
1430 Dry Creek Rd, San Jose
$628,000
5485 Don Pizarro Ct, San Jose
$850,000
188 N 18th St, San Jose
$1,250,000
105 Fox Ave, San Jose
$2,450,000
116 Meadowbrook Dr, Los Gatos
$1,298,000
19626 Vineyard Ln, Saratoga
$3,750,000
12425 Woodside Dr, Saratoga
$3,088,888
679 Cupples Ct, Santa Clara
$1,475,000
788 Bramble Ter, Sunnyvale
$2,588,000
229 Lanitos Ave, Sunnyvale
$580,000
500 W Middlefield Rd Apt 178, Mountain View
$2,599,999
1838 Higdon Ave, Mountain View
$3,475,000
2547 Somerset Dr, Belmont
$2,388,000
3569 Altamont Way, Redwood City
$1,749,888
2251 Southampton Way, San Mateo
$2,888,000
3239 Countryside Dr, San Mateo
$2,980,000
8 Bennington Ct, San Mateo
$2,198,000
937 McCue Ave, San Carlos
$1,888,000
807 Acacia Dr, Burlingame
$3,598,000
13371 Quito Rd, Saratoga
$1,088,888
5886 Southwind Dr, San Jose
$5,288,000
5600 Country Club Pkwy, San Jose
$789,000
130 Baroni Ave Apt 37, San Jose
$2,188,000
3232 Lenark Dr, San Jose
$1,998,000
1143 Summerwings Ct, San Jose
$1,999,998
1432 Stone Creek Dr, San Jose
$2,399,000
1149 S Daniel Way, San Jose
$1,998,888
1598 Wawona Dr, San Jose
$1,995,000
2597 Malaga Dr, San Jose
$1,790,000
6021 Chesbro Ave, San Jose
$1,598,000
6017 Susan Ct, San Jose
$1,849,950
793 Coffeewood Ct, San Jose
$4,218,000
20791 Via Corta, San Jose
$1,488,000
396 W San Fernando St, San Jose
$1,997,888
16505 Sanborn Rd, Saratoga
$2,590,000
111 Sunnyside Ct, Campbell
$2,499,888
1294 S Stelling Rd, Cupertino
$3,000,000
7422 Fallenleaf Ln, Cupertino
$1,350,000
368 Greenlake Dr, Sunnyvale
$1,799,998
332 Harcot Ter, Sunnyvale
$1,650,000
177 Poplar Ave, Redwood City
$2,598,000
351 Montwood Cir, Redwood City
$1,499,000
58 Burbank Ave, San Mateo
$1,948,000
663 Birch Ave, San Mateo
$580,000
711 S Bayshore Blvd Apt 16, San Mateo
$1,295,000
320 Elm St Apt 304, San Mateo
$1,398,000
657 Walnut St Apt 540, San Carlos
$1,498,000
1001 Laurel St Unit 113, San Carlos
$1,299,000
133 Llano De Los Robles Ave Unit 3, San Jose
$870,000
4741 Durango River Ct, San Jose
$5,550,000
4567 Hamilton Ave, San Jose
$3,498,888
2422 Adonis Way, San Jose
$1,225,000
5392 Cedar Grove Cir, San Jose
$1,199,000
170 Venado Way, San Jose
$2,550,000
6241 Cahalan Ave, San Jose
$2,425,000
1087 Mountain Shadows Rd, San Jose
$1,999,888
5863 Antigua Dr, San Jose
$1,820,000
4472 Waimea Ct, San Jose
$410,000
1730 Halford Ave Apt 355, Santa Clara
$1,395,000
734 Scott Blvd, Santa Clara
$2,880,000
1090 Celilo Dr, Sunnyvale
$1,188,888
181 Bel Air Ct, Mountain View
$1,699,000
392 N Whisman Rd, Mountain View
$2,650,000
452 Church St, Mountain View
$3,988,000
653 Rosewood Ct, Los Altos
$3,950,000
2230 Amherst St, Palo Alto
$1,100,000
2292 Poplar Ave, East Palo Alto
$1,699,000
319 Bryant St, Palo Alto
$1,890,000
148 Burbank Ave, San Mateo
$1,888,000
233 Poinsettia Ave, San Mateo
$1,999,888
2000 Howard Ave, San Carlos
$1,748,000
13 Del Rey Ct, San Carlos
$1,488,000
2162 Lakewood Ct, San Jose
$1,449,888
3059 Hostetter Rd, San Jose
$898,000
1038 Bellante Ln Unit 3, San Jose
$1,799,000
5100 Montreal Dr, San Jose
$799,000
4415 Norwalk Dr Apt 3, San Jose
$1,350,000
1131 Frankfurt Ave, San Jose
$2,749,888
1373 Hester Ave, San Jose
$1,650,000
610 Minor Ave, San Jose
$3,898,000
2062 Ellen Ave, San Jose
$2,399,000
1581 Edmond Ct, San Jose
$1,999,999
3180 Acorn Way, San Jose
$6,995,000
130 Longmeadow Dr, Los Gatos
$3,198,000
212 Dover St, Los Gatos
$5,295,000
14300 Maclay Ct, Saratoga
$645,000
3901 Lick Mill Blvd Apt 337, Santa Clara
$1,198,888
2329 Villa Pl, Santa Clara
$1,500,000
2035 Worthington Cir, Santa Clara
$1,488,800
734 Lakebird Dr, Sunnyvale
$2,950,000
981 College Ave, Palo Alto
$979,000
1159 Garden St, East Palo Alto
$1,999,000
2674 Briarfield Ave, Redwood City
$998,000
1500 Sherman Ave Apt 2E, Burlingame
$1,530,000
808 El Camino Real Unit E, Burlingame
$4,850,000
6 and 8 Hydrangea Ln, Nantucket
$4,388,000
5360 Laurel Canyon Dr, San Jose
$1,580,000
4794 Parkwest Dr, San Jose
$1,988,000
4359 Venice Way, San Jose
$1,788,000
188 W Rincon Ave, Campbell
$1,850,000
3416 Forbes Ave, Santa Clara
$1,450,000
2012 Cabrillo Ave, Santa Clara
$2,399,000
1092 Kildare Ave, Sunnyvale
$2,688,000
819 Flin Way, Sunnyvale
$2,398,000
834 Orange Ave, Sunnyvale
$2,388,000
459 Oregon Ave, Palo Alto
$1,348,000
1695 McKinley St, San Mateo
$2,195,000
385 Ridge Rd, San Carlos
$6,349,500
4 Bittersweet Ln, Nantucket
$4,250,000
12 Cottage Ave, Nantucket
$865,000
2175 Meadowgate Way, San Jose
$1,750,000
905 El Rio Dr, San Jose
$1,888,000
1794 Donna Ln, San Jose
$1,649,000
14541 Union Ave, San Jose
$1,898,000
14838 Union Ave, San Jose
$1,448,000
1402 Sprucewood Dr, San Jose
$2,799,000
18397 Swarthmore Dr, Saratoga
$2,398,000
244 Darryl Dr, Campbell
$748,888
3901 Lick Mill Blvd Apt 225, Santa Clara
$2,225,000
Fairlane Ave, Santa Clara
$3,288,000
11106 Linda Vista Dr, Cupertino
$5,850,000
15060 Montebello Rd, Cupertino
$2,825,000
867 Humewick Way, Sunnyvale
$2,488,000
1176 Blair Ave, Sunnyvale
$1,649,800
201 Ada Ave Apt 6, Mountain View
$4,188,000
568 Irven Ct, Palo Alto
$2,449,000
2715 Belmont Canyon Rd, Belmont
$1,795,000
1567 Hawes Ct, Redwood City
$1,865,000
3 Fayette St, Nantucket
$1,599,888
2227 Emerald Hills Cir, San Jose
$1,150,000
28 Topeka Ave, San Jose
$1,250,000
1949 Huxley Ct, San Jose
$1,549,000
1845 Coastland Ave, San Jose
$1,295,000
3247 Rama Dr, San Jose
$1,698,000
2389 Apsis Ct, San Jose
$1,950,000
1924 Rosswood Dr, San Jose
$2,050,000
6150 Meridian Ave, San Jose
$1,620,000
1275 Eden Ave, San Jose
$2,399,000
18570 Montpere Way, Saratoga
$1,998,000
16500 Sanborn Rd, Saratoga
$1,790,000
236 N 3rd St, Campbell
$2,649,000
1897 Cook Ct, Santa Clara
$4,200,000
19160 Cozette Ln, Cupertino
$1,698,000
201 Pine Way, Mountain View
$2,800,000
941-943 Miramonte Ave, Mountain View
$2,800,000
937-939 Miramonte Ave, Mountain View
$2,800,000
945-947 Miramonte Ave, Mountain View
$2,800,000
933-935 Miramonte Ave, Mountain View
$4,250,000
2172 Sierra Ventura Dr, Los Altos
$4,395,000
24285 Summerhill Ave, Los Altos
$1,398,000
1616 Ark St, San Mateo
$439,000
324 Catalpa St Apt 120, San Mateo
$4,188,888
21570 Edward Way, Cupertino
$1,250,000
513 Leland Ave, San Jose
$999,000
1225 Sierra Ave, San Jose
$4,240,000
20564 Kirwin Ln, Cupertino
$5,748,000
3724 Laurel Way, Redwood City
$1,649,000
1702 Woodside Rd, Redwood City
$1,595,000
135 E Okeefe St Unit 4, Menlo Park
$6,498,000
40 Montana Ln, Menlo Park
$1,775,000
1654 Creek Dr, San Jose
$2,180,000
136 Eldora Dr, Mountain View
$5,198,000
27220 Carrington Cir, Los Altos Hills
$2,200,000
3642 Farm Hill Blvd, Redwood City
$3,395,000
2201 Hillside Dr, Burlingame
$1,398,888
3213 New Jersey Ave, San Jose
$2,690,000
134 Sunnyside Ave, Campbell
$2,998,000
2706 Belmont Canyon Rd, Belmont
$5,750,000
25 Pond View Dr, Nantucket
$2,350,000
915 Sherman Oaks Dr, San Jose
$1,825,000
851 Leigh Ave, San Jose
$1,674,714
841 Altino Blvd, San Jose
$1,485,000
1355 Sierra St, Redwood City
$2,695,000
9 Autopscot Cir, Nantucket
$1,690,000
1868 Anne Marie Ct, San Jose
$1,649,000
1563 Clarita Ave, San Jose
$1,788,888
4513 Brunswick Ave, San Jose
$1,875,000
876 Desert Isle Dr, San Jose
$1,244,999
1569 Oxford St, Redwood City
$3,598,000
2025 Santa Cruz Ave, Menlo Park
$1,499,800
553 Mill River Ln, San Jose
$575,000
1055 N Capitol Ave Apt 129, San Jose
$1,849,000
3475 Del Norte Dr, San Jose
$3,750,000
1091 Lancer Dr, San Jose
$1,035,000
885 Myrtle St, San Jose
$1,299,000
1830 Charmeran Ave, San Jose
$1,475,000
763 Stardust Ln, San Jose
$1,995,000
5619 Mireille Dr, San Jose
$1,288,000
402 N 11th St, San Jose
$2,548,000
359 Penn Way, Los Gatos
$3,890,000
288 Nino Way, Los Gatos
$3,650,000
17288 Eaton Ln, Monte Sereno
$5,275,000
15217 Sobey Rd, Saratoga
$5,750,000
20210 LA Paloma Ave, Saratoga
$2,998,000
10435 Pineville Ave, Cupertino
$2,050,000
975 Sutter Ave, Sunnyvale
$1,499,888
2463 Tamalpais St, Mountain View
$6,388,000
1720 Penny Way, Los Altos
$1,600,000
1727 Madison Ave, Redwood City
$2,100,000
977 Pleasant Hill Rd, Redwood City
$3,198,000
1715 Ralston Ave, Burlingame
$8,999,000
2155 Geri Ln, Hillsborough
$2,800,000
1553 Quiet Pond Ln, San Jose
$2,495,000
86 Baxter Rd, Nantucket
$850,000
2505 Olivegate Ln, San Jose
$779,800
67 Mirabelli Cir, San Jose
$1,850,000
5245 Bucknall Rd, San Jose
$1,999,999
2099 Emory St, San Jose
$765,000
1652 Braddock Ct, San Jose
$3,895,000
1519 Peregrino Way, San Jose
$1,299,888
5988 Indian Ave, San Jose
$1,750,000
1247 Ironbridge Way, San Jose
$1,578,888
3108 Santa Margarita Ave, San Jose
$2,380,000
200 Jackson St, Los Gatos
$1,525,000
143 Harvester Pl, Campbell
$1,799,999
2086-2088 S San Tomas Aquino Rd, Campbell
$2,980,000
10151 Bonny Dr, Cupertino
$3,200,000
10541 Madera Dr, Cupertino
$748,000
880 E Fremont Ave Apt 729, Sunnyvale
$1,980,000
1603 Morgan St, Mountain View
$2,499,000
113 Beacon St, Mountain View
$1,498,000
2379 Lyall Way, Belmont
$2,598,000
512 Lakemead Way, Redwood City
$2,650,000
623 Upland Rd, Redwood City
$899,000
601 Leahy St Apt 306, Redwood City
$1,698,000
1703 Roosevelt Ave, Redwood City
$1,398,000
777 Morrell Ave Apt 206, Burlingame
$5,999,000
336 Brentwood Rd, Hillsborough
$919,000
580 Messina Gardens Ln, San Jose
The screener ranks what is already listed. The same underbuilt signals also power the target lists behind unlisted deals: our guide to finding off-market teardown opportunities on the SF Peninsula covers owner outreach, probate and pre-foreclosure records, and the listing-lifecycle triggers that surface these lots before they reach the MLS.
Underbuilt-Lot Screener FAQ
What is an "underbuilt" lot?
A lot is underbuilt when the existing house uses only a small share of the floor area the zoning would allow, for example, a 1,200 sqft mid-century home on a lot where the city permits 3,500+ sqft. The unused building envelope is the opportunity: add square footage, or scrape and rebuild larger.
How is the redevelopment score calculated?
We estimate the maximum single-family gross floor area allowed on each lot using the city's own zoning rule (its floor-area-ratio formula or coverage/height limits), then compare it to the existing living area to get a utilization percentage and the buildable headroom in square feet. The 0-100 score weights how far below the envelope the home is, its age, and lot size. It is a screening estimate, verify FAR, setbacks, and height with the local planning department.
What is the difference between "expansion room" and a "teardown candidate"?
Expansion room means there is meaningful unused floor area to add on. A teardown candidate is flagged only when a home is both using a low share of its envelope AND is older (pre-1978) on a sizable lot, the profile where a scrape-and-rebuild typically pencils out. Requiring both age and low utilization keeps newer small homes from being mislabeled.
Where do the floor-area limits come from?
Each city sets its own single-family FAR or floor-area limit in its zoning code. We curate the actual rule per city, including sliding-scale formulas (Palo Alto, Mountain View, Menlo Park, Los Altos, Saratoga, Los Gatos), with a municipal-code citation and an as-of date. Cities we have not individually curated, or that set no explicit FAR, use a clearly-flagged conservative estimate.
Does this pair with SB 9 and ADU analysis?
Yes. An underbuilt lot that is also SB 9-eligible or strong for an ADU is a compounding opportunity: you can expand the primary home, split the lot, or add units. The property detail page shows all three signals side by side.
Which markets does the screener cover?
Active listings across San Mateo County and Santa Clara County, scored against each jurisdiction's floor-area rules so you can focus on the most underbuilt Silicon Valley lots.
Related guides
Keep going with more AddressIntel research on this market.
Does Lot Size Drive Price on the SF Peninsula?
House size drives Peninsula price ~7x harder than lot size, and what that does to your land basis.
Can You Sell an ADU Separately in California? AB 1033 and the Peninsula Opt-In Map
Where ADUs can legally be sold as condos on the Peninsula, and what a second exit does to ROI.
When Does a Bay Area Teardown Pencil?
The land-vs-improvement-value test for when a Peninsula teardown actually pencils.