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ADUs & Additions

63 articles about adus & additions

Written by licensed contractors · CSLB #1078806 · 500+ projects completed
San Jose ADU Cost 2026 | Architect-Led | Hamilton Exteriors
Cost GuideAdu

San Jose ADU Cost 2026 | Architect-Led | Hamilton Exteriors

San Jose ADU construction costs range from $200,000 to $375,000 for a detached unit in 2026. Architect-led pricing guide with permit fees, ROI, and

Second Story Addition Cost in Palo Alto | Hamilton Exteriors
Cost GuideAdditions

Second Story Addition Cost in Palo Alto | Hamilton Exteriors

Second story addition cost in Palo Alto ranges from $250K to $600K. Architect-led design-build with transparent pricing. CSLB #1078806. Free on-site estimate.

ADU Cost Palo Alto 2026 | Architect-Led | Hamilton Exteriors
Cost GuideAdu

ADU Cost Palo Alto 2026 | Architect-Led | Hamilton Exteriors

Palo Alto ADU costs range from $275,000 to $500,000 for a detached unit in 2026. Architect-led design-build with transparent pricing. CSLB #1078806.

Second Story Addition Cost in Mountain View | Hamilton Exteriors
Cost GuideAdditions

Second Story Addition Cost in Mountain View | Hamilton Exteriors

Mountain View second story addition costs range from $300 to $450 per square foot. Architect-led pricing, permit guidance, and local code details.

ADU Cost in Mountain View 2026 | Hamilton Exteriors
Cost GuideAdu

ADU Cost in Mountain View 2026 | Hamilton Exteriors

Mountain View ADU costs range from $230,000 to $420,000 for a detached unit in 2026. Garage conversions start at $150,000. Architect-led design-build by CSLB

Second Story Addition Cost Milpitas | Hamilton Exteriors
Cost GuideAdditions

Second Story Addition Cost Milpitas | Hamilton Exteriors

Second story addition costs in Milpitas range from $200 to $400 per square foot. Get a detailed breakdown of pricing, permits, and Santa Clara County

Milpitas ADU Construction Cost Guide (2026) | Hamilton Exteriors
Cost GuideAdu

Milpitas ADU Construction Cost Guide (2026) | Hamilton Exteriors

Milpitas ADU construction costs range from $170,000 to $400,000 for a detached unit. Get a detailed cost breakdown, permit fee estimates, and local Milpitas

Second Story Addition Cost in Los Gatos | Hamilton Exteriors
Cost GuideAdditions

Second Story Addition Cost in Los Gatos | Hamilton Exteriors

Los Gatos second story additions cost $200 to $500 per sq ft in 2026. Get architect-led pricing, permit guidance, and WUI fire zone requirements for your home.

ADU Cost in Los Gatos, CA (2026 Guide) | Hamilton Exteriors
Cost GuideAdu

ADU Cost in Los Gatos, CA (2026 Guide) | Hamilton Exteriors

Los Gatos ADU costs range from $150,000 to $500,000 in 2026. Detailed pricing for detached units, garage conversions, and JADUs. CSLB #1078806.

Cupertino Home Addition Cost (2026 Guide) | Hamilton Exteriors
Cost GuideAdditions

Cupertino Home Addition Cost (2026 Guide) | Hamilton Exteriors

Cupertino home additions cost $300 to $550 per square foot in 2026. Architect-led guide with permit details, fire zone rules, and real pricing. CSLB #1078806.

Cupertino ADU Cost Guide 2026 | Hamilton Exteriors
Cost GuideAdu

Cupertino ADU Cost Guide 2026 | Hamilton Exteriors

Cupertino ADU construction costs range from $150,000 to $500,000 in 2026. Get a detailed, architect-led cost breakdown for detached units, garage

Home Addition Cost in Campbell CA | Hamilton Exteriors
Cost GuideAdditions

Home Addition Cost in Campbell CA | Hamilton Exteriors

Campbell home additions cost $200 to $500 per square foot. Get a detailed 2026 price breakdown for second-story additions, room extensions, and ADUs.

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