Licensed & Insured • Manhattan, NYC
Manhattan Apartment Renovation Contractor
Corniel Construction is a licensed and insured Manhattan general contractor specializing in apartment renovation projects for co-op and condo owners. We provide full-service remodeling, coordinating board approvals, building requirements, permits, and construction management while delivering high-quality renovations that meet NYC standards and timelines.
Manhattan Condo & Co-op Experienced
Board Package Coordination
COI Coordination
DOB Coordination With Licensed Professionals
Fully Licensed & Insured
Manhattan Renovation Experience
Our Manhattan Apartment Renovation Services
Whether you are renovating a newly purchased apartment, updating an outdated residence, or planning a complete gut renovation, Corniel Construction supports every stage of the renovation process—from planning and coordination through construction and final completion.
Full apartment gut renovations
Kitchen remodeling
Bathroom remodeling
Electrical and plumbing upgrades
Flooring, plaster, and painting
Co-op and condo board approval coordination
NYC DOB permit and filing assistance
Expert project management and on-site supervision
COST
Manhattan Apartment Renovation Cost
Investment depends on the verified scope, existing conditions, building requirements, and selected finishes. full gut renovations typically require a higher investment based on apartment size, building requirements, project scope, and selected finishes.
Partial Apartment Renovation
$50K – $100K+
Kitchen, bathroom, flooring, painting, and apartment upgrades.
Full Apartment Gut Renovation
$100K – $250K+
Complete apartment renovation including layout modifications, electrical, plumbing, and finish upgrades.
Luxury Apartment Renovation
$250K – $500K+
Custom millwork, premium materials, designer finishes, and high-end apartment remodeling.
Why Apartment Renovations Are Different
Apartment renovations in Manhattan involve more than construction alone. Building regulations, access limitations, logistical requirements, and coordination with property management can significantly influence project timelines, costs, and execution.
Building Logistics
Access restrictions, elevator reservations, material deliveries, and designated construction hours often require careful planning and coordination throughout the renovation process.
Building Requirements
Many Manhattan co-op and condo buildings require approvals, insurance documentation, and alteration agreements for compliance before construction begins.
Project Coordination
Successful residential remodeling projects require coordination among homeowners, architects, building management, and contractors to maintain schedules and compliance.
Featured Manhattan Renovation Projects
Manhattan Apartment Renovation: Co-op & Condo Requirements
Whether you own in a co-op or a condo, we review the property’s alteration requirements early and coordinate the construction documentation needed for the applicable management or board review.
Co-op Renovation Rules (Alteration Agreement)
Co-op boards are protective of the building’s plumbing stacks, electrical risers, and structural integrity, so their requirements are strict:
- High-limit liability insurance and workers’ compensation minimums
- Strict 9-to-5 work hours, with no weekends or holidays
- Wet-over-dry restrictions—no bathrooms or kitchens above bedrooms or living rooms
- Security deposits held by the board to cover common-area damage
Condo Renovation Approval Process
Condos are generally more streamlined, but still require a formal application and board review focused on protecting common areas and licensed mechanical work. A board-ready package typically includes:
- A detailed scope of work
- Architectural plans (when structural or layout changes are involved)
- Contractor licenses and insurance certificates
- Lead-based paint disclosures (for older buildings)
Renovation Process
A Seamless Step-by-Step Process
Initial Consultation
Project goals, apartment layout, budget parameters, and building requirements are carefully reviewed.
Board Submission
Alteration agreements, architectural drawings, insurance documentation, and submission packages are prepared and coordinated.
Approval & Permits
We support the board approval process and coordinate permit applications and regulatory filings when required.
Renovation Work
Demolition, construction, installations, and finish work are completed in accordance with approved plans and specifications.
Final Inspection
Comprehensive walkthroughs are conducted, final details are addressed, and project completion is confirmed.
Planning That Prevents Costly Surprises
Renovating an apartment smoothly in Manhattan depends on what happens before demolition. We plan early to catch building limits, logistics, and hidden conditions—so your budget and timeline hold.
Feasibility first: We confirm what your building allows — riser locations that dictate bathroom placement, electrical capacity for induction ranges and central air, and slabs that can’t be trenched to reroute pipes.
Logistics under control: We handle restricted work hours, shared service elevators, and delivery scheduling—helping reduce complaints, delays, and building conflicts.
Pre-construction discovery: We probe behind the walls early to find hidden gas lines, unplanned beams, and degraded plumbing—cutting change orders before final sign-off.
Reviews for Corniel Construction LLC
Leor
I’ve hired Corniel Construction for new flooring, drywall/painting, vanity installations, and miscellaneous repairs. I definitely recommend them.
Barry Neal
Corniel is amazing. I hired Corniel for a 25,000 sf corporate office restoration. Not only did they do a fantastic job, they finished 4 weeks ahead of schedule and on budget.
Alice Lewellen
We remodeled 3 bathrooms and Ruben was amazing. Everything we asked for, he made sure we were satisfied. Even when I changed my mind or asked for an additional thing, Waldy made it happen. We could easily contact him every day, and he always responded ASAP.Waldy is very experienced and knowledgeable, even offering helpful suggestions.
Frequently Asked Questions
How Does The Apartment Renovation Process Typically Work?
Most New York City apartment renovations begin with planning, scope development, and a review of applicable building requirements. Construction proceeds after any required approvals, documentation, and scheduling are completed.
What Documents May Be Required Before NYC Apartment Renovation Begins?
Requirements vary by building and project scope. Common requirements may include architectural drawings, insurance documentation, and renovation-related applications.
How Long Does A Gut Renovation Take In NYC?
Plan for a 9 to 12-month timeline overall: 3–5 months for design, board approval, and DOB permits; 4–7 months for construction; and about 1 month for close-out and the Letter of Completion. Rushing in Manhattan often triggers board or city issues that stall a site for weeks, so tight project management matters more than speed.
Are Building Rules Important During An Apartment Renovation?
Yes. Many apartment buildings establish rules regarding work hours, access procedures, deliveries, and construction activities within the property.
Can Electrical And Plumbing Systems Be Updated During A Renovation?
Yes. Electrical and plumbing upgrades are a common part of Manhattan apartment renovations, and any work affecting risers, stacks, or building systems typically requires DOB coordination and board sign-off. We coordinate the required filings and board sign-off process with licensed professionals as part of the project.
Why Is Project Coordination Important For Apartment Renovations?
Apartment renovations often involve coordination among homeowners, contractors, building management, and design professionals. Effective coordination helps keep the project organized and on schedule.
Ready To Renovate Your Manhattan Apartment?
Speak with an experienced contractor who understands co-op and condo renovation requirements. We’ll review your project scope, timeline, and building requirements to help you get started.