Great Experience in Building
Built for Life Crafted with Care
From groundwork to finishing touches, we design and build spaces that stand up to daily life and age gracefully.
About Our Company
Transforming Visions into Dependable Spaces
Led by Antonio Guandulain, AG Construction blends practical skill with a client-first approach to deliver projects that last. Our team leverages twelve years of focused experience to manage permits, timelines, and craftsmanship, ensuring that clients in Napa, CA, receive results aligned with their goals.
Experience You Can Trust
With twelve years of focused expertise, AG Construction manages every detail — from permits to timelines — ensuring craftsmanship and reliable results in every project.
Client-First Approach
Led by Antonio Guandulain, our team prioritizes each client’s goals, delivering construction solutions tailored to their needs and built to last in Napa, CA.
quality Services
Solutions for Every Building Need — From Plans to Lasting Finish
AG Construction blends practical skill with a client-first approach to deliver projects that last. Our team leverages twelve years of focused experience to manage permits, timelines, and craftsmanship, ensuring that clients in Napa, CA, receive results aligned with their goals.
New Construction
Full-service new construction from permits through final finishes; transparent timelines, durable materials, experienced, reliable project management, and long-term structural value.
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Home Remodeling
Comprehensive home remodeling with collaborative design, licensed trades, energy-efficient upgrades, premium finishes, phased scheduling, and dedicated quality assurance for satisfaction.
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New Additions
Seamless home additions: structural evaluation, permit handling, matched exterior finishes, integrated systems, precise scheduling, and thorough final inspections for quality.
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ADU Construction
ADU design and construction with zoning guidance, permit coordination, compact efficient layouts, durable materials, utility integration, and turnkey occupancy readiness.
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Kitchen & Bathroom Remodeling and More
Kitchen and bathroom renovations emphasizing function and longevity: layout optimization, premium fixtures, waterproofing, ventilation, durable finishes, and minimal household disruption.
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Deck
Custom deck design and construction: site evaluation, durable materials, safe footings, code-compliant railings, finishing treatments, maintenance guidance, and post-build inspection.
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Fence
Fence installation for security and aesthetics: terrain assessment, material selection, compliant installations, custom gates, automation options, maintenance recommendations.
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Concrete
Concrete solutions from subgrade prep to decorative finishes: reinforcement, correct curing, control joints layout, CSA-compliant mixes, and post-pour inspection services.
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Why Choose AG Construction
Choose AG Construction because we combine passion, responsibility, honesty, punctuality, and quality to produce reliable results. Our licensed expertise and focused process protect your investment, minimize delays, and ensure transparent communication. We take ownership of every detail, ensuring clients experience peace of mind, timely completion, and craftsmanship that lasts, guaranteed.
Project Planning
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Re-Renovations
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latest project gallery
Recent Work — See Projects That Speak for Themselves
Our portfolio showcases residential and commercial projects that demonstrate exceptional structural quality, thoughtful design, and durable finishes. Each gallery entry includes scope summaries, before-and-after photos, and key outcomes to help clients envision similar transformations.
our Values
Built on Values — What Guides Our Work
AG Construction’s approach is rooted in core values that guide decisions on every job. These principles ensure consistent quality, clear communication, and accountable project delivery across residential and commercial work.
Passion
Responsibility
Honesty
Punctuality
Quality
Ready to Build? Let’s Work Together
Ready to start? Contact AG Construction to discuss your project scope, timeline, and budget. Our licensed team in Napa, CA, is prepared to provide a clear plan, cost estimate, and dependable schedule.
Get in touch!
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Ready to Build? Let’s Work Together
Ready to start? Contact AG Construction to discuss your project scope, timeline, and budget. Our licensed team in Napa, CA, is prepared to provide a clear plan, cost estimate, and dependable schedule.
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(707) 235-6364