Energy-efficient replacement windows for Ellicott City homes — from the hillside colonials of Font Hill and Dunloggin to the older houses near historic Main Street.
Serving 21042 · 21043
5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews· MHIC #05-146983
ENERGY STAR-rated units · full-frame or insert · MHIC #05-146983
5 ⭐⭐⭐⭐⭐· Google & Trustpilot reviews
From the hillside colonials of Font Hill and Dunloggin to the older houses near historic Main Street. ENERGY STAR double-hung, casement, and bay windows installed by our own local Maryland crew. MHIC #05-146983. Free written estimate.
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
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!
Ellicott City's housing runs the full range of Howard County — 1960s–1980s split-levels and colonials climbing the hills around Font Hill, Dunloggin, and Valley Mede, newer construction out toward Turf Valley, and the older, character homes tucked near historic Main Street and the Patapsco. What ties them together is windows that are due. The original aluminum and early vinyl units on the mid-century homes have lost their seals — you can see the fog between the panes — and they leak heat in January and cooling all summer, driving BGE bills up on some of the largest, most exposed elevations in the county.
We replace them with ENERGY STAR-rated windows matched to how the house is built and how it faces. For most Ellicott City homes that means double-hung or casement units with Low-E glass and argon fill, in a full-frame or insert installation depending on whether the existing frames are still sound. On the west- and south-facing hillside elevations that take the afternoon sun, we spec the Low-E coating that cuts solar heat gain so the upstairs bedrooms stop baking. Every opening is flashed and foam-sealed so the new window performs the way the label promises — a window is only as good as the water-and-air seal around it, and that's where cheap installs fail first.
Every project is installed by our own local crew, and backed by a written workmanship warranty separate from the manufacturer's glass warranty. We pull Howard County permits, and for the older homes near the historic district we're careful to match sightlines and grille patterns where it matters. Before we quote, we measure every opening and note which frames can take an insert versus a full-frame replacement, and we put that in writing so there are no surprises on install day. As a licensed window contractor in Ellicott City, we handle full-frame window installation and replacement.
Most Ellicott City window projects run $650–$1,400 per window installed for standard double-hung or casement units, with bay, bow, and specialty shapes higher. Whole-home replacements of 10–20 windows typically land between $9,000 and $26,000 depending on size, glass package, and full-frame versus insert. You get a written, per-window estimate before scheduling. Call 410-508-6141.
Windows in Ellicott City — Common Questions
How much does window replacement cost in Ellicott City, MD?
Most standard double-hung or casement windows run $650 to $1,400 each installed in Ellicott City. Bay, bow, and specialty shapes cost more. A whole-home replacement of 10–20 windows usually lands between $9,000 and $26,000 depending on size, glass package, and full-frame versus insert install.
Full-frame or insert replacement — which do I need?
It depends on the existing frame. If the frame and sill are still sound, an insert (pocket) replacement is faster and less invasive. If there's rot or you want to correct old air leaks, full-frame replacement is the right call. We inspect and note it per opening in writing before you decide.
Will new windows actually lower my BGE bill?
On the mid-century Ellicott City homes with failed aluminum or early vinyl windows, yes — noticeably. ENERGY STAR Low-E glass with argon fill stops the heat loss and solar gain those old single- and failed double-pane units let through, especially on the large west- and south-facing hillside elevations.
Can you match windows on an older home near Main Street?
Yes. On the older, character homes near the historic district we match sightlines and grille patterns where it matters, and we pull the proper Howard County permits. If a property falls under historic-review rules, we'll flag that before the order goes in.
