Room addition contractors in Mill Valley, CA
24 contractors pulled 25 room addition permits in Mill Valley in 2025–26. Ranked by the number of room addition permits; license classes are checked against what California requires for this work.
Across all cities we track, the median declared value of a room addition permit is $107,354 (middle half $49,712–$250,000). See Room addition cost in Sacramento & the Bay Area.
- G Family INCSan Rafael · #893848 · 15 permits · room addition: 2
- Northbay Home Construction Solutions INCSan Rafael · #1068839 · 12 permits · room addition: 1
- Golden Bay ContractorNovato · #992507 · 9 permits · room addition: 1
- Bay Home RemodelingOrinda · #1042086 · 9 permits · room addition: 1
- Michael StoneSan Rafael · #968847 · 6 permits · room addition: 1
- Terry MC Daniel ConstructionCorte Madera · #660688 · 6 permits · room addition: 1
- Millsap Degnan & Associates INC.San Rafael · #777635 · 6 permits · room addition: 1
- R De Leon ConstructionSan Rafael · #1101710 · 6 permits · room addition: 1
- SunworksSan Francisco · #733755 · 5 permits · room addition: 1
- Gannon Construction CompanySan Rafael · #544989 · 4 permits · room addition: 1
- Diego Lopez Construction LLCNovato · #907204 · 4 permits · room addition: 1
- Buildrite Bay Area INCEl Sobrante · #1091028 · 4 permits · room addition: 1
- Management Design V Brothers CORPRichmond · #1093616 · 4 permits · room addition: 1
- Kasten BuildersRichmond · #362773 · 3 permits · room addition: 1
- Rac Construction INCSan Anselmo · #1133478 · 3 permits · room addition: 1
- Spellbound ConstructionNovato · #756158 · 2 permits · room addition: 1
- Utopia Design & ConstructionSan Jose · #1003593 · 2 permits · room addition: 1
- TG General Building Construction INCSan Rafael · #1022444 · 2 permits · room addition: 1
- A J D Builders INCSanta Rosa · #954608 · 2 permits · room addition: 1
- Western SlopeOakland · #1041770 · 1 permit · room addition: 1
- R Da Silva ConstructionPleasant Hill · #840471 · 1 permit · room addition: 1
- Don J Birch ConstructionNovato · #757671 · 1 permit · room addition: 1
- Marin Design & Build CORPMill Valley · #1120049 · 1 permit · room addition: 1
- Galaxy Serviceslicense not matched · 1 permit · room addition: 1
Also licensed for this work in Mill Valley (no room addition permits in our data)
- Van Acker Const Assoc INCMill Valley · #533858 · 16 permits
- Bic Construction INCMill Valley · #1066314 · 10 permits
- Refresh And Build INCMill Valley · #1036042 · 9 permits
- Pio Mcgarr INCMill Valley · #761436 · 8 permits
- MCDP DBA Geothersun ConstructionMill Valley · #953829 · 7 permits
- East Peak Builders INCMill Valley · #978210 · 5 permits
- Plonowski Architects + BuildersMill Valley · #649916 · 5 permits
- Dennis Webb ConstructionMill Valley · #821554 · 5 permits
- CDR Builders INCMill Valley · #1120248 · 5 permits
- NestaduMill Valley · #1117837 · 4 permits
- Ard Macha ConstructionMill Valley · #938100 · 4 permits
- Vida Building Systems INCMill Valley · #946778 · 3 permits
- Faubel Construction INCMill Valley · #781646 · 3 permits
- Leonardo Construction INCMill Valley · #941164 · 3 permits
- Mccarthy Design/BuildMill Valley · #762467 · 3 permits
- Towey Construction INC.Mill Valley · #988183 · 2 permits
- Singlepoint Design Build INCMill Valley · #963428 · 2 permits
- Hildebrand Renovation INCMill Valley · #621953 · 2 permits
- G Moran Construction INC.Mill Valley · #783942 · 2 permits
- Bayside Remodeling & ConstructionMill Valley · #680332 · 2 permits
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