University City Window and Door Replacement
STL Windows and Doors installs ProVia replacement windows and exterior doors for homeowners in University City, Missouri.
University City puts this in writing more plainly than any city around it. Its building code lists, among the work that requires a permit, the addition, removal or change-out of any type of glazing in the thermal envelope of a building, including windows, glazed doors and skylights. There is nothing to argue about.
The exemption list is short and windows are nowhere on it. For scale, a detached shed only escapes a permit here at 50 square feet or less, where St. Peters allows 120. Fitting security bars or protective grills over a window or door opening needs a permit as well.


University City Window Replacement
The bigger question here is whether the Historic Preservation Commission sees your application, and the answer catches people out. It is not only landmarks and homes inside a historic district. Any structure within three hundred feet of a historic district, and any property on the National Register, is referred to the Commission.
There is one carve-out. A National Register property inside a private subdivision that runs its own review process, and which is not a University City landmark and not inside a City-designated district, is not referred.
University City Door Replacement
What the Commission judges is not style. The code states plainly that no specific architectural style shall be required. It looks at whether the historical or architectural character of the existing building is preserved, and whether the work is compatible with the buildings around it and the open spaces it relates to visually. For a front door that usually comes down to proportion, light pattern and trim rather than material.
The Commission advises, it does not veto. It recommends approval or disapproval within 45 days, or within 30 days where you amend the application after speaking with them, and you are told the meeting dates and may attend. The Zoning Administrator can still issue the permit after a recommendation of disapproval, and either outcome can be appealed to the Board of Adjustment.

Why Choose STL Windows & Doors
- 10-year workmanship guarantee: Every installation is backed for a full decade. Anything not right, we return and correct it at our expense.
- In-house, factory-trained installers: Every ProVia installation is handled by our own certified people, which is what keeps the manufacturer warranty intact.
- On-time and reliable: We arrive on schedule, keep you informed as the job progresses, and treat your home with care from start to finish.
- Free in-home consultations: We’ll come to you, measure carefully, and set out your options honestly, without pressure and without hidden fees.
- BBB Accredited Business: Accredited under our Earth City address, where the rating and the complaint record are open to read.
What Do University City Customers Say?
These are Google reviews from our customers, quoted exactly as they were written. Our full Google profile and our Better Business Bureau record are both public, so read the rest of them rather than taking our word for anything on this page.
★★★★★
The quality of their work cannot be overstated. The house is so much warmer now with the doors and windows. And just in time for the winter storm too! They were very professional and make sure nothing was in the driveway and the house where they worked around was very clean. I will always recommend them to whoever I know that needs work done.
Shahnawaz Qalbani
Google review
★★★★★
We've had the windows less than a week and while they appear to be good quality and I'm sure they'll serve us well, I can't in good conscious comment on them yet. So this is about our installer, Hannah. She was an absolute delight. 100% professional yet friendly, and clearly knows what she's doing. I would recommend without hesitation.
David Vaughn
Google review
★★★★★
Phenomenal customer service and expertise. The team was friendly, knowledgeable, courteous and careful. I couldn’t recommend STL Windows and Doors more, or this particular installation crew!
Sara Friedhoff
Google review
The 300-Foot Rule and the Historic Preservation Commission
That 45-day clock is the practical point. If your address is anywhere near a historic district, put a review cycle in the schedule before anything is ordered rather than discovering it afterwards.
University City runs on the 2018 edition of the building code, so the detail differs from cities on the 2021 edition. It is one more reason a quote written for one address in this metro is not automatically right for another.
On price there is no single figure per window, because it moves with size, style, glass package and how many openings are involved. Our Window Replacement Buyers Guide sets out what actually drives it, and financing is available if you would rather spread it.
Installations carry a 10-year workmanship warranty from us and a limited lifetime transferable product warranty on the ProVia units. We keep the crew in house, which matters more than usual here, because the person who prepares a Commission referral needs to know what the Commission actually asks for.

Design, Order, Install, Inspect
Our Simple But Proven Process
Talk with a Pro
Give us the address. Whether you are within three hundred feet of a historic district decides whether a Commission referral is part of this.
Onsite Assessment
We measure every opening and record the existing light pattern and trim, which is what a Commission referral is judged on if yours needs one.
Deliver Your Estimate
You get an itemised estimate, and where a referral applies, a realistic date that includes the 45-day review rather than one that pretends it away.
Get a Free Quote
Ready to find out what new windows or doors would cost for your home? Request your free estimate today.
The fine print:
* Cash Discount. All discounts apply to MSRP costs. Discount available once per residence per term. No adjustments can be made on prior sales. Subject to qualifying credit approval. Mention the deal at the time of scheduling your free in-home consultation.






















