The Collaborative Renovation of Hotel del Coronado
As-Built Scope of Work
- Floor plans
- Roof plan
- Electrical plan
- Exterior elevations
- Interior elevations
- Revit model
The Historical Significance of the Property
The Hotel del Coronado, opened in 1888, has long been an architectural marvel, known for its grand wooden structure and iconic Victorian design. The hotel’s legacy extends far beyond its aesthetic appeal; it was designated a National Historic Landmark in 1977, making it an essential piece of American architectural history. The hotel’s century-old history includes hosting many high-profile guests, including Marilyn Monroe, who famously starred in Some Like It Hot, filmed on the property in the 1950s.

As the hotel evolved, it faced the challenge of maintaining its historic character while adapting to the modern demands of the hospitality industry. The recent renovation aimed to ensure that the hotel’s historical elements were preserved for future generations while updating its facilities to maintain its competitive edge in the luxury market.
PPM’s Role in Creating As-Built Plans and a Revit Model for WATG
We were brought on to create comprehensive As-Built plans and a detailed Revit model of the hotel. This project encompassed the surveying of 368 guestrooms and public spaces across five floors, a monumental undertaking for any property, especially one with such an intricate design and historical significance.

Our surveyors utilized cutting-edge technology, including the Leica RTC 360 scanner, to capture highly accurate 3D data of the property. This data formed the foundation for the Revit model, which was essential for WATG’s design team to visualize and plan the renovations. Our As-Built deliverables ensured that the hotel’s architectural details were faithfully represented, including complex features like the iconic turret and ornate woodwork, which required special attention to preserve both their functional and aesthetic qualities.
By providing WATG with accurate and detailed plans, we ensured that every design decision WATG made was informed by precise, real-world data.
WATG’s Perspective on the Hotel del Coronado Remodel
The hotel has experienced several updates over the years. Many of these updates were less sensitive to the building’s rich history, making the latest renovation project essential for preserving the hotel’s historical character while modernizing its amenities. WATG led the design efforts, collaborating closely with a team of key players, including Heritage Architects and Planners, led by historical architect David Marshall, and contractor Swinnerton Builders, who had long-standing experience with the property.
WATG’s involvement began after David Marshall had already started working on the front porch renovation, but the scope soon expanded to include major areas of the hotel, including the lobby and public spaces. The challenge for the team was to carefully navigate the complexities of a building that had settled over time, with walls no longer aligned or vertical. Much of the building has shifted over the years due to its wood-frame construction.

The renovation of the lobby was one of the most impactful areas of change. The space underwent a significant redesign, with the front desk area being pushed back to improve traffic flow and increase the room’s openness. This change also involved adding more natural light by installing new windows in the lobby’s upper areas. In addition to aesthetic upgrades, the mechanical systems in the lobby were completely overhauled, with engineers working to improve the ventilation and ensure that the space met with modern building codes.

Many rooms, particularly in the Victorian building, were irregular in shape and no two rooms were identical. Because of this, they needed precise As-Built drawings completed for every guest room. Without this information, they would have been working with incomplete data, which would pose high risks for costly mistakes down the road.

Throughout the property, other important renovations included the restoration of the ballrooms and meeting rooms in the Victorian building. The historical reference materials, including David Marshall’s collection of postcards, were invaluable for understanding how the building originally looked. These postcards, some dating back to the 1920s, allowed the team to track architectural changes and identify features like the original colonnade around the ballroom that had since been removed.

“We’ve worked with PPM on several projects, and what stands out to me is their responsiveness and the quality of their work. On this project, their As-Built documentation was a key factor in allowing us to execute renovations that were both sensitive to the hotel’s history and aligned with our vision for its future.”
– Jason Van Auker | Senior Project Architect, WATG
PPM’s Surveyor’s Perspective: Capturing the Intricate Details of the Hotel del Coronado

For the Hotel del Coronado renovation project, PPM’s Director of Product Development, Greg Davies, served as the lead As-Built surveyor, overseeing the scanning and data capture process. Greg surveyed the hotel with the Leica RTC 360 terrestrial scanner to capture the building’s intricate details. Chosen for its heavy-duty capabilities, the RTC 360 was essential in documenting the complex and detailed features of the hotel’s exterior. From the thousands of banisters and detailed woodwork to the finely crafted window trim, this scanner was able to pick up every nuance of the building’s facade. This scanner’s ability to pick up 2 million data points per second ensured that no detail went unnoticed. This technology was crucial for creating an accurate model, enabling us to capture every nook and cranny around the building’s façade.
Scanning Strategy: Building a Complete Data Network

To ensure comprehensive data capture, Greg employed a strategic scanning technique that focused on scanning full exterior loops, essential for connecting multiple scans taken at different levels of the building. With varying heights throughout the property, including balconies and mezzanine areas, careful coordination was required. The scanning began from the ground level and extended upward, covering the roof and all five stories in some places. A key strategy was to ensure that each scan, whether from the ground or the roof, had enough overlap with adjacent scans to guarantee strong data alignment. Greg notes that the challenge of scaling the roof, particularly a round turret that extended almost to ground level, required creative problem-solving and a bit of agility.
How the Scanner Works: GPS, VIS, and IMU Technologies

The Leica RTC 360 is equipped with GPS, but the system’s real strength lies in its Visual Inertial System (VIS) and Internal Measurement Unit (IMU). The VIS system uses five cameras to track thousands of unique features in the surrounding environment, while the IMU functions like an accelerometer in your phone, tracking the scanner’s movement and tilt. Together, these technologies ensure that even when moving the scanner from one location to another, the data remains well-aligned. The scanner uses these systems to identify and track key points wherever it is place, allowing the software to triangulate the scanner’s position with high precision. While the scanner does much of the work automatically, there is still a bit of manual data alignment during the processing phase to ensure everything is in place.

“It’s a very sophisticated piece of hardware. The system uses algorithms and powerful computing to lock all the data together, but there’s still a manual check I complete in the processing software to confirm that all those assumptions that the VIN system made are correct.”
– Greg Davies | Director of Product Development, PPM
Managing the As-Built Project: Overcoming Challenges and Ensuring Success
We asked Frank Guerrero, PPM’s Project Lead about his experience managing this project. Managing a large-scale project like the As-Built plans for the Hotel del Coronado comes with its unique set of challenges, particularly when dealing with a landmark property in the heart of a bustling hospitality environment. The complexity of the project lay not only in the size of the hotel but also in the operational intricacies of surveying a live hotel while minimizing disruption to guests and staff.
Navigating Access Limitations
According to Frank, one of the most significant hurdles faced by the project team was ensuring access to the various spaces that needed to be surveyed. With hundreds of guest rooms to document, it was critical to design a plan that would allow the survey team to conduct their work without causing disruptions. Daily coordination with the hotel front desk was essential to ensure as many vacant rooms as possible were available for surveyors. However, due to the nature of the hotel’s operations, many rooms were occupied, and access was limited. To mitigate this, the team worked out a solution that allowed surveyors to enter occupied rooms during housekeeping rounds, reducing the need for hotel escorts. This clever workaround kept things on track while respecting the hotel’s guest experience.
In addition to guest rooms, public spaces across five floors were also surveyed. When access to guest rooms was not possible due to occupancy or timing constraints, the survey team shifted focus to the public areas, maintaining momentum. This flexibility in the flow of the survey ensured the project remained on schedule, despite the occasional need to adjust based on real-time access conditions.
Maintaining High Client Expectations Through Effective Communication
From the outset, clear and consistent communication was identified as the cornerstone of the project’s success. Our client, WATG, had a clear vision of the level of detail required for the As-Built plans. Frank worked closely with the survey team to ensure everyone understood the client’s expectations and specifications, particularly for areas with significant historical features. Having this well-established framework of communication meant that any questions or concerns that arose during the survey process could be quickly addressed, with regular check-ins ensuring the project was always aligned with the client’s needs.
Adapting to Unexpected Requirements: Scaling for Success

As the project progressed, a major turning point came when it became apparent that the number of interior elevations required would exceed 3,000—a task far larger than initially anticipated. The Production Lead’s proactive response to this challenge involved reaching out to our drafting team and requesting additional support. By securing three additional team members, the project maintained its momentum, and the survey team was able to focus on finalizing field data collection without compromising on quality or timeliness. This quick decision to bolster the team ensured that the project remained on track despite the increased workload.
Navigating Challenges to Remain Successful
Managing a project of this scale requires not only technical expertise but also the ability to navigate the operational realities of working within an active hotel environment. By combining meticulous planning, flexibility, and strong communication, the team was able to meet the client’s high expectations and deliver comprehensive As-Built plans for the Hotel del Coronado—no small feat for such a historic and high-profile project.
Capturing Complexity: A Drafter’s Perspective on Modeling Hotel del Coronado
Translating the survey data into a highly detailed Revit model for the Hotel del Coronado required careful organization and a strategic approach. With a vast amount of data to process, maintaining clarity and accuracy throughout the modeling process was essential. Our drafter, Angelo Maldonado, Production Lead at PPM, was responsible for the majority of the model setup, including establishing levels, constructing walls, inserting doors and windows, and incorporating the hotel’s intricate roof drainage systems.
The historical complexity of the hotel’s architecture presented unique challenges, particularly with its castle-style roofs. While these elements required advanced modeling techniques, strong internal support from a senior drafter and modeler provided valuable guidance, ensuring that all decisions were made with confidence. By working methodically, focusing on walls, then roofs, and finally refining details, the team maintained efficiency and accuracy, preventing unnecessary backtracking.
Collaboration played a key role in addressing data gaps and ensuring that the final model reflected both the functional and aesthetic integrity of the hotel. A dedicated team chat provided a space to quickly resolve uncertainties, keeping progress on track. This was particularly beneficial when assembling the complex roof structures, where real-time feedback helped refine execution. Seeing the completed model in 3D was a rewarding milestone, highlighting the precision and teamwork that went into capturing the essence of this iconic landmark.
Preserving the Legacy of Hotel del Coronado Through Collaboration
The renovation of the Hotel del Coronado stands as a testament to the successful fusion of historical preservation and modern design. Our collaboration with WATG played a crucial role in ensuring that the hotel’s iconic Victorian architecture was meticulously documented and preserved for future generations. Our precision in creating detailed As-Built plans and a Revit model, using state-of-the-art technology, allowed for an accurate representation of the hotel’s intricate design, which was essential for the successful execution of the renovation.
The project not only honored the hotel’s historical significance but also equipped it with the modern amenities needed to continue its legacy as a premier luxury destination. Through careful planning, effective communication, and technical expertise, the team ensured that the Hotel del Coronado remains a cherished symbol of elegance, seamlessly blending the past with the present. To learn more about WATG, their expertise, and their services, visit www.watg.com.