Raleigh, NC · RESIDENTIAL & COMMERCIAL GENERAL CONTRACTOR
Historic restorations. commercial buildouts.
The only contractor you need
We don't pick easy jobs. We pick the right ones.
Our services
Residential
Construction
Designed Around You
EXPLORE RESIDENTIALCommercial
Construction
ONE CONTRACTOR, NO RUNAROUND
EXPLORE COMMERCIALCOMPLIANCE WITHOUT COMPROMPISE
EXPLORE INSTITUTIONALInstitutional
historic
revitalization
BLENDING ERAS SEAMLESSLY
EXPLORE HISTORICOur services
Residential
Construction
Designed Around You
EXPLORE RESIDENTIALCommercial
Construction
ONE CONTRACTOR, NO RUNAROUND
EXPLORE COMMERCIALCOMPLIANCE WITHOUT COMPROMPISE
EXPLORE INSTITUTIONALInstitutional
historic
revitalization
BLENDING ERAS SEAMLESSLY
EXPLORE HISTORICAbout Keystone
9 States
Work Completed Coast to Coast
3 Countries
Work Completed in Bermuda, US, and Mexico
Keystone Structures was built on the belief that the hardest jobs deserve the most accountability. We work across residential, commercial, historic revitalization, and institutional scopes — bringing on-site leadership, period-accurate craftsmanship, and modern performance to every project we take on.
We don't pick easy jobs. We pick the right ones.
Three
Generations of Construction & Historic Experience
$50k - $2.5M
Project Range
9 States
Work Completed Coast to Coast
3 Countries
Work Completed in Bermuda, US, and Mexico
Keystone Structures was built on the belief that the hardest jobs deserve the most accountable contractors. We work across residential, commercial, historic revitalization, and institutional scopes — bringing on-site leadership, period-accurate craftsmanship, and modern performance to every project we take on.
We don't pick easy jobs. We pick the right ones.
3
Generations of Construction & Historic Experience
50k - 2.5M
Project Value Range
Our work
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How it works
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1. Send a request
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2. Take measurements
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3. Approve budget
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4. Start project
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5. Finish on schedule
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What people say about building with us
"We hired Keystone to convert our attic space and turn it into a bonus/game room. He was extremely professional throughout the process and communicated well. He is very meticulous and does amazing work!"
-SF
Attic Conversion Client
"We had a great experience with Keystone Structure and our contractor, Martin. We had a leak in our bathroom and he responded promptly and came over quickly to fix it. Not only did he stop the leak, but he also did an amazing job remodeling our bathroom. He prepared the estimate and worked with our insurance company. Martin is reliable and his work is beautiful. I highly recommend him for any home improvement project."
-NK
Water Damage Repair and Bathroom Remodel Client
"After personally trying to purchase materials, there were problems with delivery and installers installers told me they were afraid they would damage my home and the other area. Martin at Keystone was recommended to us, came to look that day, agreed to install, had materials onsite within the week and work completed above my hopes. Months later, he also advised me on flooring remodeling, and did a light bathroom remodel for me. The Best!"
-GH
Exterior Doorway and Bathroom Remodel Client
"Martin thought of everything I could have wanted, before I knew I wanted it! I Love this room and it's one of my favorite places to be in the house now! Keystone Structure exceeded our expectations!"
-CI
Master Closet Remodel Client
Thank you, Martin Isaac and his company Keystone Structure, for a job well done! After my Tesla alerted me to an overheating outlet, Martin responded immediately and discovered faulty wiring and damaged components that could have led to a house fire. He quickly made the repairs and ensured everything was safely installed. Professional, knowledgeable, and responsive—I highly recommend them for any electrical work!"
-Electrical Repair and Install Client
FAQs
General Contracting
What does a general contractor do?
A general contractor manages the full construction process — coordinating subcontractors, sourcing materials, scheduling inspections, and keeping your project on time and on budget. Keystone Structures handles commercial and residential construction projects across the Raleigh, NC area, serving as the single point of accountability from preconstruction through final walkthrough.
How do I choose the right general contractor in Raleigh, NC?
Look for a licensed contractor with verifiable project experience, strong subcontractor relationships, and transparent cost breakdowns. Ask for references from similar project types. Keystone Structures holds a full commercial license in North Carolina and has deep experience in residential additions, rebuilds, and remodels — as well as specialty historic restoration work.
Are you licensed for commercial construction in North Carolina?
Yes. Keystone Structures holds a full commercial contractor's license in North Carolina and is fully insured. We are based in Raleigh and serve clients throughout the Triangle and surrounding regions.
Residential & Commercial Construction
What types of residential projects do you take on?
Keystone Structures specializes in residential additions, full rebuilds, and remodels. Whether you're expanding your home, reconfiguring a floor plan, or undertaking a ground-up rebuild, we bring the same level of planning discipline and trade coordination that commercial projects demand.
Do you handle both residential and commercial projects?
Yes. Our roots are in residential remodeling and additions, and we have expanded into commercial construction — including historic preservation and envelope restoration. We bring that same hands-on craftsmanship and project management approach to every scope we take on.
Are you expanding into commercial tenant improvement work?
Yes — commercial tenant improvements are an active area of growth for Keystone Structures. We bring years of remodeling, structural, and finish work experience to TI projects, and we are actively building our commercial portfolio in the Raleigh market. If you have an upcoming TI project, we'd welcome the conversation.
Historic Preservation & Restoration
What does historic building restoration involve?
Historic restoration returns a building's exterior or interior elements to their original condition using period-appropriate materials and methods. This can include window restoration, masonry repair, façade rehabilitation, and envelope work. Projects on designated historic structures may require compliance with Secretary of the Interior Standards and review by preservation authorities.
Can you work on NPS-funded or grant-funded historic preservation projects?
Yes. Keystone Structures has experience bidding and executing preservation work on projects funded through National Park Service grants. We understand the documentation, reporting, and compliance requirements that come with federally funded historic preservation scopes.
Do you restore historic windows and building envelopes?
Yes. Window restoration and full building envelope rehabilitation are core services at Keystone Structures. We work on wood and steel windows, exterior masonry, and façade systems on historically designated buildings — preserving original character while improving performance and weathertightness.
How do I know if my building qualifies for historic preservation funding?
Buildings may qualify if they are listed on or eligible for the National Register of Historic Places, located within a designated historic district, or owned by an institution that has received a preservation grant. Contact your State Historic Preservation Office (SHPO) for eligibility determinations. Keystone Structures can help you understand scope and compliance requirements once funding is in place.
Let’s talk about your project
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