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Your Trusted Remodeling Partner in San Francisco
21st Century Home Improvement is a family-owned and operated general contracting firm with over 30 years of experience serving the Bay Area. We specialize in delivering high-quality home improvement solutions tailored to meet the unique needs of homeowners. Our comprehensive services include interior and exterior painting, roofing, window replacement, carpentry, vinyl siding, seismic retrofitting, and full-scale remodeling projects. We are particularly known for our expertise in ADU construction, guiding clients through the entire process from permits to completion. By offering a diverse range of services under one roof, we eliminate the need for homeowners to coordinate multiple contractors, saving time and reducing costs.

Our commitment to excellence is reflected in our licensed and insured status, attention to detail, and focus on long-lasting results. With our main office in San Francisco, we serve Marin, Alameda, Contra Costa, and San Mateo counties. Our team prioritizes clear communication, professional service, and client satisfaction, ensuring every project aligns with the homeowner's vision and budget. We take pride in building trust through transparency, reliability, and a personalized approach to every job.
Services
Interior Painting Roofing Window Replacement Carpentry Vinyl Siding Remodeling Seismic Retrofitting ADU Construction
Highlights and features
  • We offer over 30 years of experience in Bay Area home improvement
  • Our team provides a comprehensive range of services under one roof
  • Specialized expertise in ADU construction and permitting processes
  • Family-owned business prioritizing personalized client relationships
  • Proven track record of completing complex multi-service projects
What people say
High quality work Knowledgeable team Reasonable bid Finished on time Honesty and integrity
Services
Interior Painting
Refresh your home's interior with our professional painting services. We use premium, durable paints and meticulous techniques to ensure flawless finishes. Our team prepares surfaces thoroughly and protects your belongings during the process, delivering results that enhance your home's aesthetics and value.
Roofing
Upgrade your home's protection with our comprehensive roofing solutions. From foundation repairs to premium shingle installation, we ensure watertight, long-lasting roofs. Our experts assess structural integrity and recommend optimal materials for your climate and budget.
Window Replacement
Improve energy efficiency and curb appeal with our window replacement services. We install high-quality windows that enhance insulation while maintaining your home's architectural style. Our precise installation ensures proper sealing and optimal functionality.
Seismic Retrofitting
Protect your home with our seismic retrofitting solutions. We reinforce structural components to meet safety standards, minimizing earthquake damage risks. Our engineers develop customized plans to strengthen foundations and connections for enhanced stability.
ADU Construction
Create additional living space with our ADU construction expertise. We handle permits, design, and construction from foundation to finish. Our team ensures compliance with local regulations while maximizing functionality and value for your property.
Questions
What home improvement services do you specialize in?
We specialize in interior/exterior painting, roofing, window replacement, carpentry, vinyl siding, seismic retrofitting, and complete home remodeling including ADU construction.
Do you serve areas outside San Francisco?
Yes, we serve the entire Bay Area including Marin, Alameda, Contra Costa, and San Mateo counties.
What makes your ADU construction service unique?
Our ADU service includes full project management from permitting through completion, ensuring compliance with local regulations while maintaining quality standards.
Can you handle multiple home improvement projects simultaneously?
Yes, our diverse service offerings allow us to coordinate multiple projects efficiently, reducing costs and scheduling conflicts for homeowners.
Are you licensed and insured for home improvement work?
Yes, we are a fully licensed contractor with license #682929 and carry comprehensive insurance for all our services.