Stained Glass Appraisal, Inspection, and Restoration Expertise Nationwide
With over 75 years of combined experience, NSGCG provides professional stained glass
appraisals, condition reports, inspections, and project management across the United States.
- Stained Glass Appraisals: Insurance, estate, market, and replacement cost valuations.
- Condition Reports: Comprehensive, detailed documentation, including professional
photographic records. - Stained Glass Inspections: Thorough structural and aesthetic evaluations.
- Stained Glass Project Management: From stained glass specifications to vendor selection
and final walkthroughs. - Historic Restoration Specifications: Preserving authentic stained glass windows.
- Sell Your Stained Glass: List your valuable stained glass windows for sale with us.
Why Choose Us?
Trusted by churches, institutions, residential clients, architects, and engineers nationwide.
Ready to protect, restore, or sell your stained glass? Contact NSGCG today to get started.
Inspections & Condition Reports
Comprehensive professional assessments of stained glass condition, structural integrity, and preservation needs with detailed documentation.
- Detailed condition analysis
- Structural assessment reports
- Preservation recommendations
- Photography documentation
Photographic Documentation
Professional high-resolution photography and digital archiving services for stained glass windows, creating permanent historical records.
- High-resolution digital imaging
- Historical archival standards
- Before/after documentation
- Digital preservation formats
Protective Coverings
Specification and consultation for protective glazing systems to safeguard valuable stained glass from environmental damage.
- Detailed condition analysis
- Structural assessment reports
- Preservation recommendations
- Photography documentation
Stained Glass Appraisals
Professional valuation services for insurance, estate, donation, and sale purposes by certified appraisal experts.
- Certified professional appraisals
- Insurance documentation
- Market value analysis
- Estate & donation valuations
Restoration Consulting
Expert guidance for historically accurate restoration projects, ensuring preservation of artistic integrity and cultural significance.
- Historical research & analysis
- Period-appropriate techniques
- Conservation methodology
- Craftsperson recommendations
Project Management
Complete project oversight from planning through completion, serving as owner’s agent for stained glass restoration and conservation projects.
- Owner's agent services
- Contractor coordination
- Quality control oversight
- Timeline & budget management
Church & School Security
Risk management starts with identifying vulnerabilities while implementing a foundational approach to deploy advanced practical mitigation solutions.
- Security glass and glazing solutions
- Bullet resistant window and door systems and solutions
Project Management
Complete project oversight from planning through completion, serving as owner’s agent for stained glass restoration and conservation projects.
- Owner's agent services
- Contractor coordination
- Quality control oversight
- Timeline & budget management
Church & Nonprofit Security Solutions | Protecting Your Congregation and Legacy
I created a series of large stained glass murals of the four seasons of Yosemite. I began this project in 1986 and completed the final mural in 2022. Now I needed an accurate and detailed report of their fair market value and condition.
Through research and referrals, we found the National Stained Glass Consulting Group. We thoroughly checked their credentials and Karl Erickson and Cynthia Gallagher are extremely knowledgeable about all of the intricacies involved in stained glass. They have a combined experience of over 70 years dealing with large projects in construction and restoration and actually working on Tiffany studio creations.
We had many conference calls with Cynthia and she did a very thorough replacement value report on the murals. She shares her expertise and knowledge of stained glass. We have really enjoyed working with her.
Karl came to California and inspected the murals in situ and gave us a very professional report on their condition and the aesthetic value of the murals unique work of art. We were very impressed with Karl’s knowledge and experience. It was great meeting him!
We really appreciate the time and work you put in to give us professional appraisals.
The National Stained Glass Consulting Group gets 5 Stars from us! Thank you so much Karl and Cynthia!
Bill Poulson and Bobbette Budworth
Poulson Glass Studio
We are located in the heart of the Midwest and service the continental United States.
-
I'd like to thank Karl at nscg for taking time from his busy day to help me identify the origin and determine the value of my stained glass pieces. His... read more
Chuck Berzett
February 17, 2024Outstanding expertise! The owner of NSGCG Karl Erickson was masterful in his analysis of just a few photos I sent to him. He gave me meticulous details about the glass, lead,... read more
Michael Sutton
June 5, 2022 -
Outstanding expertise! The owner of NSGCG Karl Erickson was masterful in his analysis of just a few photos I sent to him. He gave me meticulous details about the glass, lead,... read more
Michael Sutton
June 7, 2021Outstanding expertise! The owner of NSGCG Karl Erickson was masterful in his analysis of just a few photos I sent to him. He gave me meticulous details about the glass,... read more
February 17, 2022 -
Great communications!!!!. Very thorough and comprehensive appraisal in every way. A pleasure to talk with and do business!!!
Randal
February 17, 2022We are remodeling our home and weren’t sure if there was any value to the existing stained glass windows – so we went looking for an expert. Karl at... read more
David Wolfe
March 1, 2022 -
I'd like to thank Karl at nscg for taking time from his busy day to help me identify the origin and determine the value of my stained glass pieces. His... read more
Chuck Berzett
May 20, 2023Karl was fantastic with providing the history and how my stained glass windows were made. He also gave me great ideas to conserve and to get the best value on... read more
Orlando Medina
February 17, 2023 -
Great communications!!!!. Very thorough and comprehensive appraisal in every way. A pleasure to talk with and do business!!!
Randal
March 21, 2021Karl was fantastic with providing the history and how my stained glass windows were made. He also gave me great ideas to conserve and to get the best value on... read more
Orlando Medina
February 28, 2022 -
We are remodeling our home and weren’t sure if there was any value to the existing stained glass windows – so we went looking for an expert. Karl at... read more
David Wolfe
February 17, 2023
