"Best Design-Build firm in Los Angeles."

- General Contractors Magazine

© Letter Four, Inc. 2024

© Letter Four, Inc. 2024

About Us

At Letter Four, Inc., we believe in the power of great spaces and people. Our passion for design and construction fuels us to create exceptional commercial spaces that elevate your business and enhance profitability.

With our true owner-partnership approach, we combine our expert backgrounds to provide a collaborative and organized facility design experience that addresses all of your needs while maintaining a streamlined process. From start to finish, we work closely with you to understand your unique goals and vision, providing personalized white-glove service that exceeds your expectations.

Our mission is to transform your business through quality spaces that attract customers and keep them returning. We do this by providing top-notch general contracting services for commercial projects in Los Angeles. We believe that your space should reflect the excellence of your business, and we're dedicated to bringing that vision to life.

From luxury retailers to the trendiest hospitality hot spots, we’ve served many satisfied brands across the greater Los Angeles area. We hope to make you one of them! If you’re an innovative organization that values good design and collaborative construction, we want to work with you. 

Our favorite clients aim to create truly special spaces through respectful teamwork. We seek imaginative projects that chart new territory in commercial design, offering the insights and expertise necessary for achievement.

Talk to Our Team

Project Planning Pack

Our Project Planning Pack is designed to give you the necessary knowledge and resources to set you up for success in your construction or remodel project. All of these resources are available to you for free, so don't hesitate to take advantage of them. 

  • Answers to frequently asked questions
  • Self-interview to understand your project better
  • Roadmap of the design and construction process, from start to finish
  • A hand-picked list of experts who can assist you at every stage of your project
  • Budget worksheet for a ballpark cost estimate
  • Project-specific checklists
  • Warning signs to look out for when interviewing architects

Don't let confusion or uncertainty hold you back – start your project on the right foot with our free resources.

Check Out Our Project Planning Pack

Your Action Plan

Starting a new construction project can be a daunting experience. Our Action Plans help you prepare for a project without committing to a full build. The package provides you with the essential first steps that we take for every project, including determining how your project fits within your budget. By investing time in these early stages, our team can help you avoid costly reworks or delays.

Plus, it's a great way to start our relationship on the right foot, allowing us to work together to determine if we're a good fit before committing to the entire project. Like dating before marriage, building a house is a big decision that shouldn't be rushed.

Our Action Plans allow you to properly plan your project and make an informed decision. Receive support and guidance to achieve your goals and create a space you'll love. Take the first step, and let us help you plan your project with our helpful resources, including budget worksheets, project-specific checklists, and expert recommendations.

Your action plan options

We’ve designed and built some of LA’s landmark spaces. See the difference in Letter Four’s commercial and hospitality projects.

Letter Four, Inc. is an industry leader in commercial construction with a strong presence in Los Angeles.  We have completed several high-profile projects in the area, including restaurants, hotels, retail spaces, and offices. Our team of experts takes pride in delivering exceptional results that exceed our client's expectations while ensuring projects are completed on time and within budget.

We understand the importance of creating a space that looks good and functions well for its intended purpose. Our commitment to quality, safety, and sustainability has earned us a reputation as one of the top commercial construction companies in Los Angeles.

View Our Work

Commercial Builds That Inspire Productivity and Innovation

Licensed Architectural Design

Get the licensed architectural design services required to develop a build-ready design. Before putting pen to paper, our professionals go the extra mile to understand your needs, motivations, and practical goals. We then leverage these insights to craft a design that goes beyond the surface, one that addresses function and experience as much as form. Our team collaborates closely with your stakeholders, accounting for the goals of your entire organization and the preferences of its customers.

You’ll receive all of the documentation and coordination needed to prepare your project for the construction phase. In addition to due diligence, design, consultant coordination, and permitting, we’ll also work closely with the contractor to see that your design is built with complete success.


Licensed General Contracting

Need licensed general contracting services to build per your architect’s plans? Our skilled construction team is here to help you prepare for construction and get the work done with outstanding quality. As contractors who understand the business value of design, we’ll work with you and your architect to ensure that construction stays true to your brand vision, down to the smallest details.

This includes pre-construction pricing to confirm that your design can be built to your standards and expectations. Our experts can prepare detailed, itemized bids, giving you the power to compare costs and make adjustments as necessary. We’re also able to assist with value-engineering, ensuring your company makes the most of its project budget.



When you want one team to handle your project in its entirety, Design-Build is the solution you need. As Design-Build specialists, we offer the seamless integration of licensed architectural design and general contracting services, giving you the advantage of a simplified process and enhanced collaboration.

Our team has mastered the process of in-house cooperation, ensuring that clear communication is maintained and all project goals are aligned with one another. We help you develop a design that is tailored to your construction budget, and coordinate to guarantee that your build reflects your design exactly. Our Design-Build services allow you to get better results in a reduced time frame, with clear communication and a high level of service.


Owner's Agent And Project Management

Get the full assistance you need in managing your project. Our owner’s agent and project management consulting services help you ensure that every stage of your project is managed by a professional, dependable expert capable of keeping everything on track.

We understand that entering the architectural design and construction process can be a major endeavor for any business. Our goal is to alleviate your team’s responsibilities, advocate for your interests, and provide you with one go-to authority who can keep you informed of your project status at all times.


Feasibility Studies

Are you unsure of what type of build or renovation your property can support? Do you need to explore the potential costs of a project you have in mind? Is expert input needed before your organization rents or purchases a particular piece of real estate? Also known as our Action Plans, our feasibility studies can provide the answers you need.

We help you gather information and determine possibilities by performing a thorough analysis of the property in question. You’ll be able to learn what options are available to you, as well as estimated costs. While this Due Diligence is an essential building block of all standard projects we work on, you may also combine it with other standalone services such as Conceptual Design to form a complete review of your project’s feasibility.


Concept Development

Need help fleshing out your vision for your brand? Our team can help you fully develop your design concept to communicate your brand’s values, improve customer experience, and strengthen your position in the local market. You’ll get a clear picture of what to aim for, providing the perfect springboard for final architectural design work.

Going through intensive concept exploration and planning allows you to correctly pinpoint the right architectural style and identify what your facility’s design should accomplish. By implementing our extensive experience creating spaces for a diverse clientele, we’ll help you visualize a space that is wholly consistent with your brand’s aesthetics, service philosophy, and operational flow.


Interior Design

Everything you need to plan and outfit your interior is provided by our team. We handle all of the initial budgeting, selection, approvals, purchasing, stocking, and detailing of all finishes and fixtures.

You’ll work closely with our design team and our in-house Interior Designer will walk you through the process of selection, addressing choices such as tile, countertops, flooring, furniture, lighting, wall treatments, and decor. Prior to this, you’ll be guided through design inspiration sessions that explore your brand’s style and qualities. Through this collaborative process, you’ll be able to envision an interior that perfectly reflects your brand’s new direction.



Due Diligence

The goal of this phase is to gather the information needed to design and construct the project.

+ More

During this initial phase, LETTER FOUR will evaluate both the project’s goals and constraints. This includes existing conditions, project timelines, and city requirements as they relate to the Client’s description of budget and project needs and desires.


Conceptual Design

This phase involves the creation of proposed floor plans and interior and exterior features.

+ More

We create hand sketches to scale to review with you for comment and approval before completing the project phase.When working with a retail brand we will prepare imagery from complementary and competitive brands, and prepare material and color palettes that work with the brand graphics, aesthetics, and brand mission. It is during this phase that we develop the big idea: What is the overall character and vision for the project and how does it relate to the site and comply with code requirements?


Preliminary Pricing

We prepare preliminary pricing for each requested option and relative to the project master plan and phasing where applicable.

+ More

Pricing is limited to the building structure(s) and does not include site work or landscaping. The pricing provided is based upon a per square foot cost for affected and new square footage areas only. The preliminary pricing for each option will be an assumed cost range based off of historical data from our past and current projects.


Schematic Design

This phase involves modeling and drafting the approved hand sketches prepared in the Conceptual Design phase.

+ More

If needed for budgeting, we will sign on consults, such as a preferred structural engineer to determine the structural scope of work. We present our clients with 3D model views alongside floor plans, site plans, exterior elevations, etc. in order to secure Client approval of the design documentation before starting the next phase.


Design Development

This stage is the start of the more technical part of the project. We begin by developing the project documentation to the level necessary to coordinate with required engineers and secure Client approval.

+ More

We prepare the basic project drawings and documentation required to submit for plan check with the department of Building and Safety. Specific drawings and documentation for individual agency approvals will be prepared as part of the Building Permitting project phase.


Construction Documents

During the Construction Documents phase we complete the bulk of our fixed fee services.

+ More

We will develop the construction drawing set and project documentation that it needed in order to build the project. This includes additional drawings like lighting plans, power plans, and additional details.For the vast majority of our projects we will finalize our construction bid, and Permitting and Interior Design phases as concurrently as well.


Permitting + Approvals

This stage involves hourly work to aid in securing the required agency approvals on the Client’s behalf.

+ More

This phase involves modeling and drafting the approved hand sketches prepared in the Conceptual Design phase.


Interior Design

At LETTER FOUR our Interior Design phase is typically not a matter of picking furniture and window treatments, but rather focused on selecting finishes and fixtures like tile, countertops, flooring, decorative lighting, and plumbing fixtures.

+ More

We have developed a way of compiling inspiration imagery, communicating with our clients, and budgeting and tracking selections needed, purchased, received and delivered online with shared logins for full transparency. We love helping our client’s projects come to life!


Construction Admin

This stage is crucial as it is during this phase that our design team works with the field to interpret drawings and make decisions with a design eye.

+ More

We make sure that every detail is completed beautifully and as-designed. When we act as architect-only this phase involves the administration of the building contract with our client’s chosen contractor and includes the review of change orders and keeping the project on schedule. Time spent by architectural and administrative staff is charged hourly as some clients prefer to be more hands-on.

Transform your commercial property with expert architectural planning and design. Collaborate with our team to create a comprehensive plan tailored to your unique needs and preferences while ensuring compliance with local building codes and regulations.

Streamline your project with a single point of contact. From conceptualization to completion, we manage everything, including architectural design, engineering, permitting, and construction. Our LA commercial general contractors aim to deliver high-quality results, minimize disruptions, and efficiently manage time and cost.

Enhance the value and functionality of your space with skilled craftsmen who will transform your project with precision and attention to detail. From full remodels to small renovation projects, we'll bring your vision to life with exceptional quality and craftsmanship.

Owner’s Agent and
Project Management

Oversee your project with confidence as we act on your behalf to ensure successful delivery. We handle everything from bidding and procurement to quality control and close-out, ensuring your project is completed on time, within budget, and to your satisfaction.

Feasibility Studies

Maximize your project's potential with a comprehensive feasibility study. Our team assesses key factors such as site conditions, zoning restrictions, budget, and timeline to determine the viability of your project. With our in-depth analysis, you'll gain valuable insights to help you make informed decisions and plan your project effectively.


Realize your vision with our expert guidance. Our designers and architects work with you to explore various design options, establish goals and objectives, and develop a detailed plan that aligns with your budget. We prioritize functionality, sustainability, and aesthetics, ensuring your project is tailored to your needs and preferences.

Interior Design

Elevate your space with a cohesive design that embodies your style and meets your functional needs. Our team of experienced designers and decorators can help you select the perfect color palettes, furniture, lighting, and accessories to bring your vision to life. With an eye for detail, we ensure every aspect of your interior design is executed flawlessly.