RESTORING the PAST for FUTURE GENERATIONS
RESTORING the BEAUTY of HISTORIC WINDOWS
We restore historic windows with care, preserving original material and craftsmanship.
Our thoughtful process protects each window’s character while improving its condition.
Costa Group helps historic buildings preserve their history for generations to come.
OUR RESTORATION PROCESS
Costa Group specializes in the careful restoration of historic windows, including stained glass and traditional wood sash. We combine skilled craftsmanship with respect for each building’s original materials and character. Every project begins with a thoughtful assessment. We then plan the work, protect the surrounding property, and carry out each restoration with care, from delicate repairs to workshop restoration and expert reinstallation.
Our goal is to preserve the beauty and history of every window while helping it serve the building for years to come.
OUR STORY
Costa Group began in 2001, when Miguel started working for a well-known restoration company. There, he discovered a passion for restoring historic windows and developed the skills that would shape his career. The company gave Miguel the opportunity to learn, grow, and eventually start a business of his own. He remains grateful for the experience and for everything he was taught.
Over the years, he continued to refine his craft, learning something new with each project. That professional relationship has continued to this day. Built on years of shared work, experience, and mutual respect, Costa Group carries that knowledge forward in every restoration, with care for the history, craftsmanship, and character of each window.
Every project begins with a thoughtful assessment. We then plan the work, protect the surrounding property, and carry out each restoration with care, from delicate repairs to workshop restoration and expert reinstallation. Our goal is to preserve the beauty and history of every window while helping it serve the building for years to come.
Latest News
Releading a Nave Window Without Losing Its Glass
Lead came has a working life. When it reaches the end, the glass does not have to go with it — here is how a full releading keeps every original piece in place.
Protective Glazing That Lets a Window Breathe
Sealed protective glazing can trap moisture against the glass it was meant to defend. Venting the cavity is what separates protection from damage.
Why We Document a Window Before Touching It
Measured drawings, rubbings and photographs are not paperwork. They are the only record of what a window looked like before anyone intervened.