ENERGY STAR double-hung, casement, and bay windows with Low-E glass and argon fill for Severn homes — from the 1960s blocks around Pioneer City to the newer Provinces of Severn and Severn Crossing colonials.
Serving 21144 · 21077
5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews· MHIC #05-146983
ENERGY STAR Low-E glass · lower BGE bills · MHIC #05-146983
5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews
Apper is based right here on Thompson Avenue, installed by our own local crew. MHIC #05-146983. Free written estimate, usually same morning.
Verified Google reviews
What Maryland homeowners say
⭐⭐⭐⭐⭐ Excellent Service, Professionalism, and Quality Work! I had an excellent experience with Apper Construction! From the very beginning, Leandro was professional, friendly, and attentive. He took the time to answer all my questions, explain the process, and provide clear information about the work and pricing. I contacted them regarding the installation of a roof vent for my bathroom exhaust fan, and I couldn’t be happier with the experience. I also want to recognize the technician who performed the installation. He did an excellent job, worked professionally, and made sure everything was properly completed. I truly appreciate his attention to detail and the quality of his work. What stood out to me the most was the excellent communication, honesty, professionalism, and dedication to customer satisfaction from start to finish. Thank you to Leandro and the technician for making this such a positive experience. I highly recommend Apper Construction to anyone looking for reliable service, quality workmanship, and a team that truly cares about its customers. I would definitely hire them again!
Niurka Yazmin Garcia Montesino
LeAndrue and his crew did exceptional work. I couldn't ask for a better experience. A + for a job well done. Highly recommended.
Preston Blake Jr
We were in need of a new roof and there was a time limit on it due to a horrible insurance company, you know the one that’s “on your side”, but they’re really not. I had at least four roofing companies come out and give me their speech like they do. For the fifth company, I dialed the wrong number that day and somehow by the grace of God a gentleman answered by the name of Leandro who owned a roofing and construction company. What are the chances? I Explained my situation and he came out the very same day to check out the roof which was 4,400 sq.ft. Mr. Leandro was so professional and answered all of our questions. Just listening to him speak about the procedure for a roof replacement was remarkable. Needless to say, he and his employees got the job! My roof was replaced even with new plywood, in one full working day. Mr. Leandro brought nine workers starting 7 AM and leaving around 6 PM. Once the Job was complete, you would’ve never known they had been there, which was so impressive. They had tarped everything, blew gutters out, and used a huge magnet to make sure there were no loose nails laying around. Throughout this whole ordeal, did I mention the price was very very fair! God Bless You Mr. Leandro and your hard-working employees!
Linda A
From first meeting until job completion Apper was responsive, punctual, and expertly professional: highly recommended for vinyl siding replacement. The company owner showed personal interest by doing the initial estimate, checking work progress, and asking my impressions as work progressed. The 5-man crew operated efficiently, with well orchestrated precision, completing the job with excellent results in 2-days. Apper Construction is the place to start for expert vinyl siding replacement at a fair price!
Thomas McDaniel
⭐⭐⭐⭐⭐ Outstanding Roof Replacement & Customer Service After a major storm, I discovered water leaking through my roof and knew I needed to find the right contractor. I received proposals from three different roofing companies before deciding on Apper Construction LLC, and I'm extremely glad I did. From the very beginning, their team was professional, knowledgeable, and honest. They took the time to explain the repair process, answered all of my questions, and never made me feel pressured. Throughout the project, they kept me informed every step of the way. The crew did an outstanding job replacing the damaged roof decking, installing new underlayment, flashing, roof vents, and shingles. Looking at the before-and-after photos, it's clear they didn't cut corners. They treated my home like it was their own, worked efficiently, and left the job site clean when they were finished. What really stood out to me was their attention to detail and craftsmanship. You can tell they take pride in their work. If you're looking for a roofing company that is professional, reliable, and delivers quality workmanship, I highly recommend Apper Construction LLC. They absolutely knocked it out of the park, and I wouldn't hesitate to hire them again. Thank you to the entire team for an amazing job!
Apper Construction is headquartered right here in Severn on Thompson Avenue, so window replacement calls in our own hometown usually get a same-morning look. And windows are one of the most common upgrades we do here, because Severn's housing stock has aged into it. The 1960s starter blocks around Pioneer City and Donaldson still have original single-pane or early aluminum sashes that fog, stick, and bleed heat; the 1970s–1980s ranches near Harmans are running first-generation double-pane units whose seals have failed and gone cloudy; and even the 1990s–2000s subdivisions like the Provinces of Severn and Severn Crossing are now hitting the age where builder-grade vinyl windows have lost their argon and their weatherstripping.
Every one of those problems shows up on the BGE bill. Failed seals, drafty aluminum frames, and thin single-pane glass make a furnace and AC work overtime through Maryland's humid summers and cold snaps. We replace them with ENERGY STAR double-hung, casement, and bay units carrying Low-E glass and argon fill, which cut the heat transfer and knock down the energy waste that Severn's older windows leak all year. Because Severn sits next to Fort Meade, a lot of our window jobs are for military families on PCS timelines who want the efficiency and curb-appeal upgrade to land before a closing or a move — so we quote fast and schedule around your date.
The right install method depends on the opening, and we inspect each one rather than guessing. Where the existing frame and sill are sound we can do an insert replacement that preserves the trim; where there's rot or the original frame is failing — common on the older Pioneer City and Donaldson homes — we do a full-frame replacement so we can flash and foam-seal the opening correctly instead of hiding a water problem behind new glass.
On Severn's older homes we also match the sightlines and grille patterns so a new window doesn't look out of place on the street. Every install is done by our own local crew, and backed by a written workmanship warranty. We pull Anne Arundel County permits and, where a community requires it, handle the architectural-review paperwork for you. As a licensed window contractor in Severn, we handle full-frame window installation and replacement.
Most Severn window projects run about $650–$1,500 per window installed, or roughly $9,000–$28,000 for a whole-home replacement, depending on size, style, and whether an opening needs full-frame work. The larger Provinces of Severn and Severn Crossing colonials with more openings sit toward the top of that range. You get a written, line-itemed estimate — including any full-frame and flashing work — before anything is scheduled. Call 410-508-6141 for a free written estimate.
Windows in Severn — Common Questions
How much does window replacement cost in Severn, MD?
Most Severn window jobs run about $650 to $1,500 per window installed, or roughly $9,000 to $28,000 for a whole-home replacement. Cost depends on size, style, glass package, and whether an opening needs full-frame work. We measure every opening and put a line-itemed number in writing before scheduling.
Will new windows actually lower my BGE bill?
Yes, noticeably, if you're replacing single-pane, old aluminum, or failed-seal units — which is what most Severn homes from the 1960s through the 1990s still have. ENERGY STAR double-hung and casement windows with Low-E glass and argon fill cut the heat transfer that drives your heating and cooling costs through Maryland's humid summers and cold winters.
What's the difference between insert and full-frame replacement?
An insert replacement fits a new window into your existing frame and keeps the trim — good when the frame and sill are sound. Full-frame replacement removes everything down to the rough opening so we can flash and foam-seal it properly — the right call when there's rot or a failing original frame, common on Severn's older Pioneer City and Donaldson homes. We inspect each opening and tell you which it needs.
Can you match the look of my older Severn home's windows?
Yes. On Severn's older ranches and Cape Cods we match the sightlines and grille patterns so the new windows look right on the street, and we flash and foam-seal every opening. Where a community runs architectural review, we handle that paperwork for you.
