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Our Firm

A trusted partner guiding you through every step of the build.

With over 30 years of combined experience, ATP Development & Construction was built on one simple belief: projects succeed when people feel informed, supported, and respected throughout the process.
 
We work closely with homeowners, families, and investors across Los Angeles to transform ideas into well-executed spaces — from early planning and design through construction and final delivery. Our team brings architecture, engineering, and construction management together under one roof, allowing us to guide each project with clarity, consistency, and care.
 
At every stage, we prioritize communication, transparency, and practical decision-making. Our goal isn’t just to build structures — it’s to help our clients move forward with confidence.
 
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Built on Experience. Driven by Accountability.

ATP Development & Construction was formed to bring clarity to a process that is often overwhelming, fragmented, and filled with uncertainty.

Our leadership has spent decades working across architecture, engineering, development, and construction management — seeing firsthand where projects break down when communication is missing or responsibilities are unclear. ATP was built to change that.

By operating as a fully integrated team, we’re able to guide clients through complex decisions with transparency and foresight — reducing surprises, aligning expectations early, and keeping projects moving forward with purpose.

Every project we take on reflects our commitment to accountability, thoughtful planning, and long-term relationships.

Leadership

Experienced leadership with hands-on involvement at every stage.

Portrait of Sergio Alvarez, Founder of ATP Development & Construction

Sergio Alvarez

Founder & Principal

Sergio founded ATP Development & Construction with a simple belief — projects succeed when people feel informed, respected, and supported. With decades of experience across development and construction, he remains closely involved in guiding clients through critical decisions and setting the standard for care, clarity, and execution on every project.

Portrait of Al Penaranda, Managing Partner at ATP Development & Construction.

Al Penaranda

Managing Partner

Al brings extensive experience in construction management and operations, ensuring projects stay organized, transparent, and moving forward. As Managing Partner, he focuses on execution, coordination, and accountability — making sure clients experience a smooth, well-managed process from planning through completion.

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Community Partnerships & Involvement

Working alongside trusted organizations to support thoughtful rebuilding and long-term community resilience.

We believe strong projects are built through strong relationships. ATP Development & Construction actively collaborates with local organizations and industry groups to support responsible development, clear communication, and community-centered rebuilding.

Foothill Catalog (Altadena)
City-aligned, design-forward home plans supporting the Altadena rebuild.

Altadena Collective (Altadena)
A community-led initiative coordinating resources and rebuilding efforts with care and integrity.

Brass Tacks
An approved contractor network connected through the Altadena Collective.

National Hispanic Construction Alliance (NHCA):
An industry organization supporting collaboration, education, and advancement in construction.

Los Angeles Latino Chamber of Commerce (LALCC):
A regional business organization supporting local enterprises and economic growth.

Through these partnerships, we’re better equipped to guide clients with trusted resources, clearer pathways, and a deeper understanding of the communities we build in.

How We Work

Clear steps. Transparent communication. Consistent follow-through.

Step 1

Listen & Understand

We start by understanding your goals, property, timeline, and constraints — so every recommendation is grounded in your reality.

Step 2

Plan with Clarity

Our team aligns design, engineering, budget, and approvals early, reducing surprises and setting a clear path forward.

Step 3

Build with Accountability

We manage construction hands-on, coordinating trades, schedules, and decisions while keeping communication consistent and transparent.

Step 4

Deliver with care

From final walkthrough to close-out, we stay engaged to ensure quality, confidence, and long-term satisfaction.

Our integrated approach allows clients to move forward with confidence — knowing the details are managed and expectations stay aligned.

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