Corniel Construction LLC serves as a premier Manhattan renovation contractor specializing in collaborative partnerships with architects and designers. We bridge the gap between high-concept design and technical execution, managing complex structural requirements, DOB filings, and building board approvals to ensure your creative vision is realized flawlessly within the NYC landscape.
Who This Page Is For
This guide is specifically designed for:
- Architects and Interior Designers looking for a reliable, technical general contractor to execute high-end residential and commercial plans.
- Homeowners and Property Buyers who have already engaged a design professional and need a construction partner capable of handling Manhattan’s unique building constraints.
- Property Managers in Manhattan and North Bergen who require a contractor experienced in navigating co-op and condo board regulations.
A Technical Planning Partner for Design Professionals
In the Manhattan luxury market, the transition from a schematic drawing to a physical structure is fraught with regulatory and logistical hurdles. Corniel Construction LLC positions itself as a technical planning partner rather than just a labor provider. We focus on early feasibility evaluation, identifying building limitations, such as plumbing stacks, load-bearing masonry, and "wet-over-dry" restrictions, before the first hammer swings.
We partner and collaborate with licensed architects and engineers as needed to ensure every structural modification meets NYC Department of Buildings (DOB) standards. By involving us during the design development phase, architects can ensure their vision is grounded in construction reality, preventing costly mid-project revisions. Our primary service area includes Manhattan, with secondary support in Brooklyn, Queens, and New Jersey markets near the George Washington Bridge.
Alt-text: Manhattan renovation contractor reviewing technical blueprints with an architect on-site.
how much does kitchen remodeling cost in Manhattan
For architects advising clients on budget, understanding the current market is essential. In 2026, a high-end kitchen renovation in Manhattan typically starts at $50,000 and can easily exceed $150,000 depending on appliance packages and custom cabinetry. As a Manhattan renovation contractor, we provide detailed line-item estimates that help designers manage client expectations.
Key cost drivers include:
- Custom Cabinetry: High-performance millwork often accounts for 30-40% of the budget.
- Stone Fabrication: Intricate waterfall islands and book-matched backsplashes require precision handling.
- Infrastructure Upgrades: Upgrading electrical panels to support modern induction cooktops and professional-grade ovens.
how much does bathroom remodeling cost NYC
Bathroom renovations in NYC are often the most complex due to "wet-over-dry" rules. A standard luxury bathroom renovation ranges from $25,000 to $60,000. For architects, the challenge often lies in moving fixtures. Many Manhattan co-op boards strictly prohibit moving toilets or drains to prevent leaks over a neighbor's living space.
We specialize in executing these high-stakes Manhattan bathroom renovations, ensuring that waterproofing systems (such as Schluter-Kerdi) are installed to exceed code requirements, providing peace of mind for both the designer and the building management.
co-op renovation rules Manhattan
Navigating a co-op board is perhaps the most significant hurdle in any Manhattan project. Unlike a Manhattan townhouse renovation, an apartment renovation is subject to the building's specific Alteration Agreement.
These rules often dictate:
- Work Hours: Usually strictly limited to 9:00 AM – 4:00 PM or 5:00 PM.
- Insurance Requirements: General Contractors must carry high-limit liability insurance (often $5M+) and name the board as additional insured.
- Prohibited Materials: Some buildings ban certain types of piping or specific demolition methods.
Our team is adept at reviewing Alteration Agreements early to ensure the design remains compliant.
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NYC renovation permits explained
Any structural change, major plumbing move, or electrical upgrade in Manhattan requires a permit from the NYC Department of Buildings. This process is managed by an expeditor.
An expeditor is a specialized professional who manages DOB permit filings (such as Alt-1, Alt-2, or Alt-3), tracks the approval progress, and coordinates the heavy flow of documentation between the architect, engineer, and contractor. It is important to note that expeditors do not design or build; they are the administrative engine that moves paperwork through the DOB system. For a Manhattan full home renovation, having an experienced expeditor is non-negotiable to avoid stop-work orders.
Alt-text: High-end Manhattan apartment undergoing a full gut renovation with exposed structural beams.
condo renovation approval process NYC
While generally less restrictive than co-ops, condos still require a formal approval process. The board will review the architect’s plans and the contractor’s credentials before issuing a "Notice to Proceed." This often involves a review by the building’s own engineer to ensure the proposed work won't impact the building's integrated systems (HVAC, risers, etc.).
We provide the necessary technical documentation, including site-specific safety plans and lead-safe certifications, to streamline this approval. Our expertise extends to Manhattan condo renovation rules, allowing designers to focus on the aesthetics while we handle the compliance.
how long does a gut renovation take NYC
Timeline management is the cornerstone of a successful B2B partnership. A full gut renovation of a Manhattan apartment typically takes between 6 to 10 months.
- Pre-Construction (2-4 months): Design, board approval, and DOB permitting.
- Demolition & Rough-In (1-2 months): Stripping the space and installing new electrical/plumbing.
- Closing & Finishes (3-4 months): Drywall, flooring, cabinetry, and tile.
Factors like elevator access, material lead times, and building "summer work" bans can significantly impact these windows. We provide architects with a detailed Gantt chart to track every phase of the project.
Alt-text: Finished luxury kitchen in a Manhattan condo featuring custom cabinetry and high-end finishes.
Complex Structural Execution and Feasibility
Architects often push the boundaries of what is possible in a pre-war Manhattan building. Whether it is removing a load-bearing wall to create an open-concept living area or combining two units, the structural integrity of the building is paramount.
Corniel Construction LLC excels in:
- Steel Beam Installation: Maneuvering structural steel through narrow service elevators or hoisting it via cranes.
- Wet-Over-Dry Compliance: Expertly navigating the restrictions that prevent installing new bathrooms or kitchens over dry areas (like bedrooms) in neighboring units.
- Subfloor Leveling: Essential for the installation of large-format tiles or wide-plank hardwood flooring in older buildings with significant settling.
We provide a comprehensive feasibility review for every project, ensuring that the architect's vision is technically sound before construction begins.
Why Architects Choose Corniel Construction LLC
Professionalism and communication are our primary exports. We understand that as a contractor, we are an extension of the architect's brand on the job site. We maintain a clean, organized site and provide weekly progress updates to ensure all stakeholders are aligned.
From the initial walkthrough to the final punch list, our goal is to eliminate the friction typically associated with Manhattan construction. We are fully licensed and insured to work in NYC's most prestigious buildings, providing the reliability that high-end designers demand.
Is Your Manhattan Renovation Budget Realistic?
The cost of labor and materials in New York City remains among the highest in the country. A realistic budget must account for not only the visible finishes but also the invisible costs: insurance, permits, expediting fees, and building protection.
Planning a Manhattan renovation? Call or text 347-567-1018 to discuss your project.
FAQ: Manhattan Renovation Partnerships
Do you have in-house architects?
We partner and collaborate with licensed architects and engineers as needed. This allows us to work seamlessly with your chosen design professional or recommend one that fits your specific style and project scope.
Do you work in New Jersey?
Yes, while our primary focus is Manhattan, we provide high-end renovation services in North Bergen and other areas of New Jersey near the George Washington Bridge.
What is an Alt-2 permit?
An Alt-2 (Alteration Type 2) permit is required for renovations that involve multiple trades (plumbing, electrical) but do not change the building's use or occupancy (which would require an Alt-1). Most apartment gut renovations fall under this category.
How do you handle board rejections?
We work closely with the architect to modify plans based on board feedback. Our experience with various Manhattan boards allows us to anticipate potential objections: such as soundproofing requirements or plumbing relocations: before they lead to a rejection.