Serving Crownsville, MD 21032

Window & Door Specialist

Window Replacement in Crownsville, MD

ENERGY STAR double-hung, casement, and bay windows with Low-E glass and argon fill for Crownsville's big wooded-lot homes — from Herald Harbor and Sunrise Beach to Waterbury and Robinwood.

Serving 21032

5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews· MHIC #05-146983

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Low-E + argon glass · flashed & foam-sealed · MHIC #05-146983

Energy-efficient replacement windows on a Crownsville, MD home by Apper Construction

5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews

Installed by our own local Maryland crew, MHIC #05-146983. Free written estimate, usually within 24 hours.

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

November 15, 2026

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

November 11, 2026

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

November 2, 2026

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

October 24, 2026

Strongly recommend Apper construction for any roof and exterior needs. Noticed a leak on Sunday, they were out on Monday to assess and give a quote. Leandro and his team were impressively thorough and they did a great job. Very thorough cleanup too!

Eric Taft

October 20, 2026

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Also in Crownsville:Gutters →Siding →All Crownsville services →

Crownsville's homes sit on wooded acre lots along Generals Highway and down toward the Severn River, and that setting drives a very specific window problem: large exposed elevations that take the full swing of Maryland's seasons. In Herald Harbor, Sunrise Beach, Waterbury, and Robinwood, the big walls of glass that make these homes feel open to the oak and poplar canopy are also the walls where old insulated units give out first. Failed seals are the number-one call we get here — that gray fog and trapped condensation between the panes on a tall picture window or a bank of double-hungs, where the argon has leaked out and the glass has quit insulating. On a large exposed elevation, a row of blown-seal windows is both an eyesore and a real drain on comfort and the power bill. We replace with ENERGY STAR-rated windows — double-hung, casement, and bay units with Low-E coatings and argon fill — sized and specced for these bigger openings. Low-E glass matters more than usual in Crownsville because the same large elevations that failed also gather a lot of solar heat gain through the gaps in the tree canopy; a good Low-E coating cuts that summer load while holding warmth through winter, and on a house with this much glass that difference is felt room to room and seen on the BGE bill. Where the existing frames and sills are still sound we do insert replacements that preserve the trim; where a long-failed window has let water into a big frame we go full-frame, take it to the rough opening, inspect for hidden damage, and rebuild it properly. Every window is flashed and foam-sealed so wind-driven rain drains out instead of sitting in the wall. The heavy oak and poplar canopy that shades Crownsville also throws limbs and debris in a storm, so for exposed elevations near the Severn we offer impact-rated glass alongside the standard packages. Because these are large, often custom-sized openings, we measure every one individually rather than order off a rough count. Every job is installed by our own local crew with a written, line-itemed estimate spelling out the exact product, glass package, and install method. We pull Anne Arundel County permits where required and haul off every old sash and frame before we leave. As a licensed window contractor in Crownsville, we handle full-frame window installation and replacement.

Most Crownsville window projects run about $650–$1,500 per window installed, or roughly $9,000–$34,000 whole-home, depending on window type, glass package, insert vs. full-frame, and the larger custom openings common on these wooded-lot homes. Impact glass sits at the higher end. You get a written, line-itemed estimate before anything is scheduled. Call 410-508-6141.

Windows in Crownsville — Common Questions

How much does window replacement cost in Crownsville, MD?

Most Crownsville window projects run about $650 to $1,500 per window installed, or roughly $9,000 to $34,000 whole-home. Glass package, insert vs. full-frame, and the larger custom openings common on these wooded-lot homes drive the number, and impact glass sits higher. You get a line-itemed written estimate first.

My big windows are foggy between the panes — why?

That fog is a failed seal — the argon between the panes leaked out and moisture got in, so the glass no longer insulates. It's the most common issue we see on Crownsville's large exposed elevations. Replacing with Low-E, argon-filled units restores the insulation and clears the view.

Do the big exposed elevations need special glass?

For most homes, a good Low-E coating handles the extra solar heat gain that comes through the canopy gaps on Crownsville's large glass walls. For exposed elevations near the Severn under heavy oak canopy, we also offer impact-rated glass to stand up to storm-thrown limbs and debris.

Insert or full-frame replacement?

It depends on the frame. If the existing frame and sill are sound, an insert keeps your trim and installs cleanly. Where a long-failed window has let water into a large frame — common on big Crownsville elevations — we recommend full-frame so we can inspect and rebuild the opening right.

More services in Crownsville

Gutters in Crownsville →Siding in Crownsville →All Crownsville services →

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