Renovating a condo in New York City is a structured and highly regulated process. Beyond design decisions and material selections, each project must move through a defined sequence of reviews, approvals and documentation. Understanding this framework at the outset establishes the foundation for a successful renovation. In substantial renovations, equal attention must be given to spatial planning, proportion, materiality, light, and the integration of building systems to achieve a cohesive architectural result. Every project begins with a clear understanding of client needs, goals, and preferences. Thoughtful coordination between design intent and technical execution is what ultimately distinguishes a refined renovation from a merely cosmetic upgrade.
Condo renovations in NYC require an Alteration Agreement, board approval and often filings with the New York City Department of Buildings. Architectural drawings must be prepared, insurance requirements satisfied and permits secured before construction can begin. Thorough design planning and disciplined project management are essential to move a renovation forward efficiently. project management are essential to move a renovation forward efficiently.
I am Jorge Fontan, an architect in New York and owner of Fontan Architecture, a Manhattan-based architecture firm. Our office works on condo renovations throughout New York City. In this post, we outline the design process, approval procedures and construction considerations involved in renovating a condominium apartment in NYC.
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Alteration Agreements
Most condominium buildings in New York City require unit owners to execute an Alteration Agreement prior to beginning any renovation work.
An Alteration Agreement is a formal contract between the unit owner and the condominium board. It defines the scope of permitted work and establishes the procedural, legal and logistical framework under which construction may proceed. This document outlines the responsibilities of both parties and sets the conditions for protecting the building and its residents during the renovation.
Alteration Agreements commonly address insurance requirements, indemnification provisions, work hours, protection of common areas, security deposits, construction scheduling and contractor obligations. Each building’s agreement is unique, and its requirements can materially influence the design and construction process.
Reviewing the Alteration Agreement early in the project is essential. The terms of this document often shape what is feasible within the apartment and how the renovation must be executed.
For a more detailed discussion, you may refer to our separate article on Alteration Agreements in NYC.
Hiring an Architect for Your Condo Renovation
Most condo renovations in New York City require the involvement of a licensed architect. Even when not strictly required by code, professional architectural oversight is often necessary to create a comprehensive design, navigate building regulations, board submissions and Department of Buildings filings.
Engaging an architect early in the process is advisable. Many of our clients retain us before closing on their apartment in order to evaluate layout potential, understand building constraints and begin preliminary design planning. Early involvement allows for informed decisions.
The architect develops the design, prepares construction drawings and coordinates the documentation required for board review and DOB approval. Filings with the New York City Department of Buildings are submitted under the architect’s license. Once the project is approved, the general contractor pulls the required work permits under their own license before construction begins. A well-managed renovation not only improves the apartment aesthetically but ensures that structural, mechanical and technical considerations are addressed comprehensively.
In larger-scale condominium renovations, careful detailing, material consistency, and long-term performance considerations are essential to preserving both design integrity and property value. These factors require disciplined integration from concept through construction.
Architectural services can vary significantly from firm to firm. At Fontan Architecture, we provide full architectural and interior design services for co-op and condo renovations. Our scope typically includes design development, construction documentation, consultant oversight, DOB filings, bidding assistance and construction administration. We remain involved throughout the process to help ensure that the design intent is executed properly and that regulatory requirements are satisfied.
For a more detailed overview of architectural services during an apartment renovation, you may refer to our related article on renovation architecture services.
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Alteration Scope of Work
The first step in a condo renovation is establishing a clear and well-defined scope of work. This involves determining the extent of alterations within the apartment and understanding how those changes will affect layout, building systems and regulatory requirements.
The scope may range from targeted renovations — such as updating kitchens, bathrooms or finishes — to a full gut renovation involving reconfiguration of walls, plumbing relocation, electrical upgrades and structural modifications where permitted. The level of intervention directly influences design complexity, approval requirements, construction duration and overall investment.
Many clients begin with general objectives rather than a fully developed plan. A comprehensive design process does not require the owner to resolve every detail in advance. We guide our clients step by step, beginning with establishing clear project goals, priorities and constraints before formal design work begins. Through structured consultation and analysis, we evaluate layout potential, building limitations and budget considerations to define an appropriate scope. Establishing this foundation early provides clarity and direction for the entire renovation.
Getting Condo Board Approval to Renovate
Before construction can begin, the proposed renovation must be reviewed and approved by the condominium board and building management. This review ensures that the work complies with the building’s rules, alteration agreement and operational requirements.
Your architect prepares a formal submission package for the board. This typically includes architectural drawings, a written scope of work, contractor information and insurance documentation. In many cases, the building retains its own reviewing architect or engineer to examine the submission and issue comments. Revisions or clarifications are common and are addressed as part of the approval process.
The duration and complexity of board review vary by building. Some approvals are straightforward, while others require multiple rounds of comments and coordination. Allowing adequate time for review and maintaining clear, professional communication with management are essential to moving the project forward efficiently.
Obtaining NYC Department of Buildings Approval
Following board approval, the project must be filed with the New York City Department of Buildings when required by scope. Most condo renovations involving plumbing, electrical work, layout changes or structural modifications require DOB review and permits.
The architect prepares and submits the construction drawings and required documentation for plan examination. The filing is made under the architect’s license and must demonstrate compliance with the New York City Building Code and other applicable regulations. A DOB plan examiner reviews the submission and may issue comments that require clarification or revision before approval is granted.
Approval timelines vary depending on the complexity of the project and the type of filing. Once DOB approval is issued, the general contractor may pull the necessary work permits under their license and construction can begin.
Hiring a General Contractor
The general contractor is responsible for executing the work in accordance with the approved drawings, building requirements and applicable codes. Prior to commencing construction, the contractor must submit proof of appropriate trade licenses — including general construction, electrical and plumbing where applicable — along with Certificates of Insurance to the building management. In many cases, the contractor is also required to execute an agreement with the condominium board.
Selecting the right contractor is critical to the success of a condo renovation. Experience working in occupied New York City buildings, familiarity with alteration agreements and the ability to manage logistics within tight constraints are essential qualifications.
When requested, we assist our clients in identifying and vetting qualified contractors. We review budgets carefully before making introductions to ensure alignment between the scope of work, level of finish and construction team. High-quality renovations require contractors capable of executing detailed work with precision and professionalism.
Custom Built-In Home Office in an NYC Renovation and Apartment Combination
Condo Apartments
Boards and management companies are responsible for protecting the building, its residents and shared systems, which requires careful review and coordination throughout the process.
Successful condo renovations depend on clear documentation, proactive communication and professional management of both regulatory and building requirements. Working collaboratively with building representatives and addressing concerns promptly helps maintain momentum and avoid unnecessary delays.
If you are considering the purchase of a condominium apartment or planning a renovation in New York City, early architectural involvement can provide clarity, feasibility analysis and comprehensive oversight from concept through construction. Fontan Architecture provides full service architecture, interior design, regulatory coordination, and construction oversight for significant condominium and co-op renovations throughout New York City.
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Jorge Fontan, AIA, is an architect and founder of Fontan Architecture based in New York City. The firm focuses on residential design, including new homes and extensive renovations for discerning clients. Through collaborative dialogue that draws on the individuality of each client, projects develop as distinct architectural responses guided by thoughtful planning, precise detailing, and a commitment to creating enduring value.
