Restoring the
brownstones, cornices,
and stoops that built New York.
We are a family-owned exterior restoration company specializing in the historic masonry of Brooklyn and Manhattan. From a single weeping cornice to a full landmark facade, we repair what time has worn — with the materials, methods, and patience the work deserves
Brownstone · Cornice · Stoop · Brick pointing
Landmark & LPC-eligible work
Local Law 11 / FISP compliant
20+
Years restoring NYC facades
14+
Brooklyn & Manhattan
neighborhoods served
200+
Brownstones, stoops &
cornices completed
5★
Average client rating across
review platforms
Cedar shingle facade · Kensington · 2023
A restoration atelier, working building by building across Brooklyn and Manhattan.
Excelon Construction was founded in 2005 by Sajin, a craftsman who came up under New York’s old-school masonry contractors. Two decades later, we still operate the way the trade was meant to be practiced — with a small, deeply experienced crew, on-site supervision every day, and an obsession with the parts of a facade most people never look up to see.
We do not chase volume. We do brownstone restoration, cornice work, stoops, brick pointing, limestone, stucco, thorocoat, waterproofing, roofing, sidewalk and concrete — all exterior, all with the focus that comes from doing the same kind of building over and over for twenty years.
Sajin
Exterior services for historic and modern buildings.
We focus exclusively on exterior restoration — the part of a building that fights weather, time, and water for a hundred years. Every service below is something we have completed across Brooklyn and Manhattan, with photos, addresses, and references available.
Selected projects across Brooklyn & Manhattan.
Every project below is a real address, a real building, a real homeowner or co-op. Browse the full archive — over 200 completed restorations — in our project archive.
Brooklyn & Manhattan, neighborhood by neighborhood.
We know which streets have soft brownstone and which have hard. We know which historic districts require LPC review and which don’t. Click your neighborhood for project examples, common repair patterns for that area’s housing stock, and a direct line to schedule a visit.
Brooklyn
Manhattan
A clear, written process — from walk-through to walk away.
We do not believe in surprises mid-project. Every Excelon job follows the same four-step rhythm, with documented progress and one direct point of contact (usually Sajin himself).
On-site visit
We come to your building, walk the facade with you, and identify exactly what’s failing — and what isn’t yet. No upselling. Sometimes the answer is “wait two years.”
Itemized estimate
Written, line-by-line, with material specifications and a realistic schedule. You see what you’re paying for, and what’s optional.
Restoration
Daily on-site supervision. Daily clean-up. Photo updates throughout. Sajin or a senior crew member is reachable by phone, text, or email seven days a week.
Walk-through & warranty
Final walk-through together. Punch list addressed before the final invoice. Workmanship warranty in writing — and yes, we come back if something needs attention.
What separates a good restoration from a great one is mostly invisible.
Most facade work fails not because the surface looks wrong on day one, but because of what happens behind the surface in years three, five, and ten. Here is how we make sure ours holds.
Twenty years of one specialty
Sajin and his crew have done little else but historic NYC exteriors since 2005. The repetition is the craft.
Right materials, never substitutes
Brownstone, limestone, lime mortar, vapor-permeable coatings — chosen to match the original substrate, not whatever’s cheapest at the supply house.
One direct contact, always
You will not be passed between project managers. The person who quoted your job is the person you call.
Landmark & LPC fluency
If your building is in a historic district, we know the rules — and we know which finishes and details will pass review.
We clean as we go
Sidewalks swept, neighbors notified, dust contained. Brownstone work is messy; the way you handle that mess is part of the job.
What our clients say.
A note about reviews: most of our work comes from referrals. The same homeowner often hires us back four or five years later, and the neighbors next door call right after. That is the only review system that has ever mattered to us.
★★★★★
Sajin and his crew scraped and painted the cornice on my four-story brownstone in Park Slope. He is knowledgeable, listens to your concerns, and stays on the job with his workers. Quality work, fair price. Within two days of him arriving, two of my neighbors hired him for the same work.
★★★★★
Sajin and Excelon saved the day when a previously hired contractor quit on Day 1 — a homeowner’s nightmare. I dodged a bullet and ended up with an honest, communicative team and a beautifully finished facade.
★★★★★
I had a big job completed with extensive cornice repair atop my brownstone. The work was done and primed in one day. They returned the next week to caulk and paint. Sajin and his crew were prompt, efficient, and courteous. Excellent work.
★★★★★
It was a pleasure working with Excelon. They came on time, communicated every step of the way, finished on time, and made the area clean at the end of every day. Highly recommend.
★★★★★
I have used Sajin on a number of properties — everything from pouring new sidewalk concrete to repairing brownstone facade. He is always great to work with.
★★★★★
They performed a smooth-surface stucco job over wavy stucco on a two-story building after power-washing and prepping the surface, with custom coloring. Beautiful result.
Honest answers about brownstone work.
Don’t see your question? Call Sajin directly at 631-464-8200 or send a note through the form below.
How much does brownstone restoration cost in Brooklyn?
Costs vary widely based on scope. Cornice repair and painting on a typical four-story brownstone runs roughly $8,000–$25,000. Full stoop restoration (including stone re-coating, riser repair, and ironwork prep) generally falls in the $15,000–$45,000 range. Comprehensive facade restoration with brick repointing, lintel repair, and waterproofing can range from $40,000 to $200,000+ depending on building height, deterioration, and landmark requirements. We provide free, itemized estimates so you can see exactly what your project requires — no obligation.
Do you work on landmark or historic district properties?
Yes — and a significant portion of our work is on properties within NYC Landmarks Preservation Commission (LPC) historic districts. We have completed projects in Park Slope, Brooklyn Heights, Boerum Hill, Cobble Hill, Fort Greene, Crown Heights North, Bedford, Clinton Hill, Greenwich Village, and the Upper East Side historic districts. We work with LPC-approved materials and methods, and coordinate directly with architects and homeowners on permit-eligible work.
Are you licensed, bonded, and insured?
Yes. Excelon Construction holds NYC Department of Consumer Affairs Home Improvement Salesperson License 2073937-DCA, and we are fully bonded and insured. Certificates of insurance are available on request for any project — we send them as a matter of course before work begins.
What neighborhoods do you serve?
We serve Brooklyn and Manhattan, with active project history across Park Slope, Bedford-Stuyvesant, Crown Heights, Carroll Gardens, Cobble Hill, Boerum Hill, Fort Greene, Clinton Hill, Greenpoint, Bushwick, Bay Ridge, Borough Park, Kensington, the Upper East Side, and Greenwich Village. If your building is in Brooklyn or Manhattan, we can visit and quote it.
Why is my brownstone facade flaking, cracking, or eroding?
How long does a typical project take?
A standalone cornice repair runs 3–7 days. A full stoop restoration is typically 2–4 weeks. Comprehensive facade restoration on a four-story brownstone usually runs 6–14 weeks, depending on scope and weather. We provide a written schedule with every estimate and report progress at each phase.
Do you handle Local Law 11 / FISP inspections?
Yes. For buildings six stories and taller, NYC Local Law 11 (now FISP — Façade Inspection Safety Program) requires periodic facade inspections and timely repair of any “Unsafe” or “SWARMP” conditions. We coordinate with your QEWI architect or engineer, perform the required repairs to spec, and document everything for the FISP filing. We do not perform the FISP inspection itself (that requires a licensed architect/engineer), but we are the contractor of choice for many QEWIs in Brooklyn and Manhattan.
Tell us about your building.
The quickest way to start is a phone call to Sajin. We will set up a time to come look at the facade, walk through what’s failing and what isn’t, and put together a written estimate within a week. No pressure to move forward.
HIS LICENSE 2073937-DCA
Bonded & Insured