Historic brick school building with arched entry and manicured landscaping, GH2 Historic Preservation.

Historic Preservation Architecture

BAPS Central on Main: Exterior Window Rehabilitation

The Oklahoma Historical Society’s State Historic Preservation Office- SHPO Citation of Merit

Washita County Courthouse with domed clock tower and classical columns, restored by GH2.

Historic Preservation Architecture

Washita County Courthouse Rehabilitation: Exterior Rehabilitation and Dome Replacement

"Father of Oklahoma Courthouses" - Former Oklahoma Governor George Nigh

Historic brick college building with turrets and clock tower, preserved by GH2.

Historic Preservation Architecture

NSU Seminary Hall: Exterior Rehabilitation and Interior Rehabilitation

More than just a building: an iconic symbol since 1889

Historic brick dormitory building at dusk with lamppost and green lawn, GH2 project.

Historic Preservation Architecture

NSU Wilson Hall: Exterior Rehabilitation, Interior Rehabilitation and Addition

2022 AIA Eastern Oklahoma People's Choice Award in Adaptive Reuse The Oklahoma Historical Society’s State Historic Preservation Office- SHPO Citation of Merit

Architectural detail of historic building with sculpted Atlas figure holding globe, GH2 Preservation.

Historic Preservation Architecture

Atlas Life Building Courtyard by Marriott: National Register of Historic Places Nomination, Section 106, Interior Rehabilitation

National Register of Historic Places since 2009 The Oklahoma Historical Society’s State Historic Preservation Office- SHPO Citation of Merit

Restored historic post office with POST sign at dusk, GH2 Historic Preservation.

Historic Preservation Architecture

City of Mesa Historic Post: Exterior Rehabilitation and Interior Rehabilitation

2024 Arizona Preservation Foundation Governor's Heritage Honor Award Arizona Forward Environmental Excellence Award

Protecting History Through Architecture

GH2 Preservation Architects is dedicated to preserving, rehabilitating, and adaptively reusing historic structures. With more than 50 years of award-winning work on significant properties across the U.S., our historic preservation architects help clients navigate every aspect of preservation compliance, planning, and design. We stay at the forefront through active involvement in preservation conferences and membership in the Building Envelope Science Institute—sharing knowledge and best practices for restoration and maintenance.

PROJECTS

Historic brick church building with twin domes at sunset, GH2 Preservation.Historic brick church building with twin domes at sunset, GH2 Preservation.

PRESS

Vernon AME Exterior Stabilization and Window Restoration

PRESS
Restored historic post office interior with cafe seating and wood finishes, GH2 project.Restored post office interior with cafe seating and wood finishes, GH2 project.

AWARD

NSU Wilson Hall - 2022 AIA Eastern Oklahoma People’s Choice Award in Adaptive Reuse

AWARD
Renovated historic industrial space with exposed beams and wood floors, GH2 project.Renovated historic industrial space with exposed beams and wood floors, GH2 project.

PROJECT

City of Mesa Historic Post Office Interior Rehabilitation

PROJECT
Historic brick armory building entrance with double doors and landscaping, GH2 Preservation.Historic brick armory building entrance with double doors and landscaping, GH2 Preservation.

AWARD

OU Armory Rehabilitation: 2020 Oklahoma State Historic Preservation Officer’s Citation of Merit

AWARD
Historic stone church with spire and outdoor labyrinth courtyard, GH2 Historic Preservation.Historic stone church with spire and outdoor labyrinth courtyard, GH2 Historic Preservation.

PROJECT

St. John's Rehabilitation and Expansion: 2014 Oklahoma Historic Society Citation of Merit

PROJECT
Historic fraternity with grand columns and uplighting at dusk, GH2 Preservation.Historic fraternity with grand columns and uplighting at dusk, GH2 Preservation.

PROJECT

OU Beta Theta Pi House Rehabilitation and Addition: 2016 AIA Eastern Oklahoma, People’s Choice Award

PROJECT

Preservation Clients & Projects

We serve private owners, municipalities, and state and federal agencies with historic preservation architecture for diverse building types and sites.

Historic neoclassical building with columns and illuminated facade at dusk

Education

Education
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Adaptive Reuse

Adaptive Reuse
3

Federal, State, Local Landmarks & Parks

Federal, State, Local Landmarks & Parks
hp project types lg

Municipal, County, State & Federal

Municipal, County, State & Federal
Santa Fe Building-70_sm

Rehabilitation & Restoration

Rehabilitation & Restoration
Two-story colonial building with gray exterior, white trim, and traditional window layout

Residential

Residential
AME951

Historic Churches

Historic Churches
ballroom951

Historic Hotels

Historic Hotels
barn951

Historic Barns

Historic Barns

Historic Preservation Architecture Services

Our team develops clear strategies for rehabilitating historic facilities, covering compliance, field assessments, design, construction documents, and construction support. We also provide practical solutions for building maintenance and restoration, backed by deep technical knowledge and a commitment to solutions that honor the past while serving today’s needs.

Historic Research

New Exterior Additions to Historic Buildings

Preservation Planning / Phasing

Building Rehabilitation, Restoration or Reconstruction

Existing Facilities Survey and Conditions Assessment

Federal and State Historic Preservation Tax Credits

State Landmark Designations

National Register Nominations

Section 106 and 110 Process Review

HABS and HAER Documentation

Historic Properties Management Plans

Grant Application Assistance

Feasibility Study

Historic research includes compilation of multiple historic resource documents; including building histories, archaeological resources, previous property owners, as well as the original architect, original contractor, and the history of how the property was designed and constructed.

In accordance with the National Park Service standards, a new addition to a historic property must preserve the building’s historic character, meaning that the addition needs to be different, but compatible with the historic building.

A Preservation Plan for a historic property is a planning tool that provides necessary information to guide the development, prioritization, and implementation of repair, rehabilitation, and restoration projects.

The choice between rehabilitation, restoration or reconstruction depends on the specific project; including, but not limited to the property’s historic significance, physical condition, proposed use, and code requirements.

An extensive survey of the condition of your historic property, which includes reviewing the roof, parapet, windows, doors, exterior sealant, decorative elements, and sidewalks around a property to look for water infiltration or areas of concern for the maintenance of the property.

Owning a historic property can provide income tax credits for the rehabilitation of historic, income-producing buildings that are determined by the Secretary of the Interior, through the National Park Service, to be “certified historic structures”.

The significance of a building or place can be determined by the American history, architecture, archeology, and culture present in districts, sites, buildings, structures, and objects.

To be listed as contributing property on the National Register of Historic Places, the building history needs to be compiled for the property; including building histories, archaeological resources, previous property owners.

Section 106 and 110 are the steps undertaken to get an eligible property listed on the National Register of Historic Places. GH2 can aid in compiling the resources to fill out the forms and provide the required documentation to have your historic property listed as a contributing property.

The Historic American Building Survey (HABS) and Historic American Engineering Record (HAER) are records of America’s built environment in multi-format surveys including measured drawings, large-format photographs, and written histories.

An excellent planning tool for successfully managing and maintaining a historic property is to develop a Preservation Management Plan. The Historic Building Preservation Plan (HBPP) works as a guide for what areas within your historic property need to be maintained.

There are many resources available for historic property Owners, above tax incentives. Grants can aid in updating the property for accessibility, or updated programs to be included in a historic property.

A feasibility study is a compilation of an existing facilities survey and conditions assessment, as well as a Preservation Plan document for a historic property. Included in the study is a building history report, review of the existing conditions.

Historic Research

Abandoned historic wooden house with weathered siding and deteriorating roof in rural setting

Historic research includes compilation of multiple historic resource documents; including building histories, archaeological resources, previous property owners, as well as the original architect, original contractor, and the history of how the property was designed and constructed.

New Exterior Additions to Historic Buildings

Untitled design-81

In accordance with the National Park Service standards, a new addition to a historic property must preserve the building’s historic character, meaning that the addition needs to be different, but compatible with the historic building.

Preservation Planning / Phasing

Historic clock tower with dual clock faces, domed roof, and classical architectural detailing

A Preservation Plan for a historic property is a planning tool that provides necessary information to guide the development, prioritization, and implementation of repair, rehabilitation, and restoration projects.

Building Rehabilitation, Restoration or Reconstruction

Aerial view of historic stone church tower with Gothic architectural details

The choice between rehabilitation, restoration or reconstruction depends on the specific project; including, but not limited to the property’s historic significance, physical condition, proposed use, and code requirements.

Existing Facilities Survey and Conditions Assessment

Historic multi-story building with classical columns and adjacent tower under clear sky

An extensive survey of the condition of your historic property, which includes reviewing the roof, parapet, windows, doors, exterior sealant, decorative elements, and sidewalks around a property to look for water infiltration or areas of concern for the maintenance of the property.

Federal and State Historic Preservation Tax Credits

Historic building facade detail with sculpted figure holding globe and ornate classical architectural elements

Owning a historic property can provide income tax credits for the rehabilitation of historic, income-producing buildings that are determined by the Secretary of the Interior, through the National Park Service, to be “certified historic structures”.

State Landmark Designations

Roman Nose State Park entrance sign with stone monument and buffalo sculpture

The significance of a building or place can be determined by the American history, architecture, archeology, and culture present in districts, sites, buildings, structures, and objects.

National Register Nominations

Modern office interior with exposed brick wall, glass partitions, reception desk, and industrial design elements

To be listed as contributing property on the National Register of Historic Places, the building history needs to be compiled for the property; including building histories, archaeological resources, previous property owners.

Section 106 and 110 Process Review

United States Post Office in Bristow Oklahoma with arched windows and entry

Section 106 and 110 are the steps undertaken to get an eligible property listed on the National Register of Historic Places. GH2 can aid in compiling the resources to fill out the forms and provide the required documentation to have your historic property listed as a contributing property.

HABS and HAER Documentation

Traditional farmhouse-style home with covered front porch, gabled roof, and classic residential architecture

The Historic American Building Survey (HABS) and Historic American Engineering Record (HAER) are records of America’s built environment in multi-format surveys including measured drawings, large-format photographs, and written histories.

Historic Properties Management Plans

Historic building facade with large arched windows along city street

An excellent planning tool for successfully managing and maintaining a historic property is to develop a Preservation Management Plan. The Historic Building Preservation Plan (HBPP) works as a guide for what areas within your historic property need to be maintained.

Grant Application Assistance

Historic brick building facade with arched windows and decorative cornice detail under blue sky

There are many resources available for historic property Owners, above tax incentives. Grants can aid in updating the property for accessibility, or updated programs to be included in a historic property.

Feasibility Study

Historic building with tall columns, large windows, and classical facade

A feasibility study is a compilation of an existing facilities survey and conditions assessment, as well as a Preservation Plan document for a historic property. Included in the study is a building history report, review of the existing conditions.

The GH2 Preservation Team Leaders

Principal, Historic Preservation Practice Director

TIMOTHY HERZER, AIA

Principal, Historic Preservation Practice Director

Since starting at GH2 in 2004, Timothy has provided exceptional design and service to each client he works with. He has worked on a variety of new construction and renovation projects—including municipal, historic preservation, equine, education, office, and recreation facilities. Timothy is passionate about preserving history in our significant structures by restoration and rehabilitation through adaptive re-use. He specializes in building envelope design and analysis for both new and historic structures.

Licensed in OK

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MINDY GRAY, AIA, LEED AP BD+C

Practice Principal - Historic Preservation

Since 2006, Mindy has focused her project experience on historic preservation and renovations for GH2. She takes pride in preserving and revitalizing significant places for a variety of clients, and she works with them individually to plan and implement successful strategies for treatment and ongoing stewardship of their historic properties. Mindy is a graduate of the University of Oklahoma with a Bachelor of Architecture and a minor in Sociology.

Licensed in OK

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MATT JENNINGS, AIA

Senior Preservation Architect

Matt is an award-winning, versatile historic preservation designer and historian with an extensive background in all facets of preservation. He is skilled in managing multiple projects and stakeholders simultaneously and has experience leading projects across the country, ranging in size and scope from detailed façade restorations to expansive public efforts to revitalize entire historic districts.

Licensed in AZ

Meet the Team