Capitol Development Design, Inc. (CDDI) is a multi-disciplinary company that has been providing high-quality engineering, surveying, and land planning services for over two decades. Founded in 1994, CDDI is headquartered in Beltsville, Maryland, and has built a reputation for delivering innovative and cost-effective solutions to its clients. Our team of experienced professionals is dedicated to providing exceptional service, ensuring that projects are completed on time, within budget, and to the highest standards.
Our Mission
At CDDI, our mission is to provide the highest quality and most cost-effective engineering, surveying, land planning, and testing services to our clients, while ensuring promptness and efficiency on all projects. We pride ourselves on our commitment to client satisfaction, and our project management structure is designed to ensure that a dedicated project manager is assigned to each project from inception to completion. This approach ensures that our clients receive personalized attention and prompt responses to their needs.
Our Services
CDDI offers a wide range of services, including:
Civil Engineering and Land Planning
Our team of civil engineers and land planners provide cost-effective solutions for designing roadways, highways, water systems, storm water management, and utility design for federal, local, and municipal clients. We offer complete land development design services, from feasibility analysis to final inspections.
Surveying
CDDI's survey crews utilize state-of-the-art equipment, including Leica, Topcon, Optech, and TDS equipment, including robotic total stations, global positioning systems, and LiDAR scanners. Our surveyors attend regular classes and seminars to stay current with the latest technology and techniques.
Geotechnical Engineering
Our geotechnical engineering department provides field subsurface studies, field and laboratory material testing, construction inspections, data analysis, and design recommendations for a wide variety of projects.
Reprographics and Document Management
CDDI provides reprographics and document management corporate capabilities, including large-scale engineering drawings and specifications.
Subsurface Utility Engineering and Locating
Our experienced team has extensive experience in subsurface utility engineering and locating, and we have the expertise and equipment needed for any project.
With over two decades of experience, CDDI has established itself as a trusted partner for clients seeking innovative and cost-effective solutions. Our commitment to quality, efficiency, and client satisfaction has earned us a reputation as a leading provider of engineering, surveying, and land planning services.
Overwhelmingly Positive Reviews
Exceptional Service and Communication
Many reviewers have praised the exceptional service and communication provided by Massoud and his staff. From the initial stages of permitting to the final stages of building a house, they were responsive, efficient, and meticulous in their work. Their professionalism and dedication to ensuring the smooth execution of projects have earned them high praise and recommendations from satisfied clients.
Key Strengths
One of the chief strengths of Massoud and his staff is their ability to navigate the complexities of civil engineering and permitting with ease. They have a deep understanding of the relevant regulations and codes, which enables them to provide expert guidance and support throughout the process. Additionally, their clear and concise communication has helped alleviate any concerns or anxiety clients may have had during the project.
Outstanding Performance
In summary, Massoud and his staff have consistently demonstrated impressive skill, expertise, and dedication in their work. Their reputation as a reliable and professional civil engineering firm is well-deserved, and they have earned the trust and confidence of their clients.

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