Call Us at (800) 840-7858 for Your Free 15-Minute Initial Phone Consultation*

Oster Legal—A Boutique Law Firm with A Personal Touch

The Law Office of Sean B. Oster, P.C. is a boutique law firm providing New York residents with direct access to Attorney Sean B. Oster. No secretaries, no paralegals, and no junior associates! This personalized approach ensures that no pertinent information is lost along the way, and provides clients with the full peace of mind that their concerns are heard.

Contact Us for Your Free 15-Minute Initial Phone Consultation


I strive to make your legal experience as easy and stress-free as possible.

Step 1

Call my office to schedule your free initial consultation or submit your legal matter using our online form below. This will be the first step in gathering information to build a solid strategy.

Step 2

Once my services have been formally retained—I will begin the process of curating all required legal documents.

Step 3

I will keep you updated and informed of your legal paperwork and court filings until case completion.


A Divorce legally dissolves a marriage and releases both parties from the responsibilities of their union. Ensure that you have a trusted attorney on your side to protect your legal rights, represent you in court, and negotiate your custody, visitation, division of property, etc.
Maintenance (Alimony)

Maintenance payments provide ongoing financial support to a spouse after a marriage has been dissolved. Maintenance is sometimes referred to as alimony, and is awarded in addition to child custody. Standards of living can drastically change after separation or divorce, often leaving one of the two parties financially vulnerable.

Order of Filiation
An Order of Filiation is a court order that must be filed if the paternity of a child needs to be legally confirmed. The order can be filed “on consent” or as part of a Paternity Case. The Order of Filiation is essential for establishing parental rights, such as custody, visitation, and child support.
Separation Agreement

A Separation Agreement is a written agreement between you and your spouse, regarding custody, maintenance, the division of marital property, etc. Most separation agreements are established during the time of your separation and actual divorce. However, some are designed to be long-term.

Child Support
Child Support is court ordered payments typically made by non-custodial parents to the custodial parent or guardian, to contribute to their child’s needs. Parents have a legal obligation to financially provide for their children. Who is responsible for Child Support will vary dependent upon income levels, and full, shared, or joint custody. My goal is to ensure that fair and reasonable child support is achieved.
Custody is the court ordered legal and/or physical right of one parent over the care, control, and maintenance of their child. Establishing conclusive Legal and Physical Custody is required to protect your rights as a parent, and more importantly, the best interest of your child. Custody Orders are legally complex and exceed full, shared, or joint custody, but also pertaining factors such as physical care, supervision, medical care, religious upbringing, and day-to-day physical care. Child Support will vary depending on income and custody levels. My goal is to ensure that both fair and reasonable Custody and Child Support are achieved.
Clearly defined Visitation Schedules ensure that both children and parents enjoy quality time with one another. Children are often the ones caught in the middle of a failed marriage, and the Law Office of Sean B. Oster is here to advocate for your child’s best interests. Whether the goal is to gain Visitation or change visitation rights—your child’s well-being is the primary goal.
Prenuptial Agreement

From a legal standpoint, marriage is a legally binding contract made between two adults. As a proactive approach to protecting current assets, future earnings, business ventures, property divisions, parental rights, etc., a prenup is required. Your Prenuptial Agreement will ensure that your expectations are clearly defined, and that your assets and interests are protected.

Estate Planning

A Will allows you to take a proactive approach to protecting your family, your assets, and your intended plans for all that you have worked hard to accomplish. Appoint an Executor to manage your estate and distribute your property exactly as you wish. Appoint guardianship of your children in the event of an untimely demise. Ease your family’s stress by clearly defining your wishes, and bypassing the lengthy probate process that will ensure if a Will is not established.
Power of Attorney
A Power of Attorney allows you to select someone (your Agent) to manage your affairs on your behalf, or “act in your place” if permanently or temporarily incapacitated. If you do not specify your preferred Power of Attorney, your affairs could be left in the wrong hands, and your intentions for your assets and finances skewed. A Power of Attorney does not extend to health and medical care.
Health Care Proxy
A Health Care Proxy allows you to choose someone (your Agent) to make general or specific health care decisions on your behalf if you are temporarily or permanently unable to do so. If you appoint no Health Care Proxy, decisions are likely to fall on your next of kin. Appoint a Health Care Proxy, and ensure that your health care wishes are respected.
Living Will
A Health Care Proxy appoints someone to specifically manage your medical care in the event you are unable to do so. While a Living Will does not appoint a specific proxy, it allows you to outline your healthcare wishes in the event that you are able to speak or act on your own behalf. Reach out to me today to ensure that your medical care is managed with the dignity and respect you deserve.


Non-Payment Proceeding
A Non-Payment Proceeding is a means of evicting a tenant for not paying their rent. Landlords cannot legally evict tenants who fail to pay rent without adhering to the Non-Payment Proceedings. If you are a landlord who requires assistance moving forward with an eviction, please contact my law office today.
Evictions/Illegal Lockout
An Eviction allows Landlords the right to terminate a lease before its end date, or to remove an unauthorized tenant. However, Landlords cannot lock out or evict tenants at their volition. Eviction is part of a lengthy legal process, whereby Landlords must file the proper paperwork. I work with landlords to navigate the complex eviction process, and with tenants to ensure that grounds for eviction are sound, checking the formal process has been followed.
Residential and Commercial Leases are rental agreements designed to protect the best interests of both Landlords and Tenants. Landlords and Tenants may establish and negotiate appropriate Lease Provisions, pertaining to multiple aspects of property use and tenancy. If you are a Landlord who wants to ensure that your Lease has the appropriate provisions, or a Tenant who requires assistance negotiating or comprehending their Commercial or Residential Lease, please call me today to discuss your needs.
Holdover Proceeding
Holdover Proceedings are a complex means of evicting a tenant for reasons other than Non-Payment of Rent. This could include lease violations, unauthorized tenants, unauthorized subletting, nuisance complaints, squatting, unauthorized pets, property damage, and illegal activity. If you are a Landlord who would like to evict a Tenant for reasons other than Non-Payment, please reach out today to discuss your Landlord rights.
HP Action
Landlords must provide their Tenants with timely repairs and services, as laid out in your Lease. If a Landlord fails to uphold their responsibility, filing an HP Action will protect your Tenant rights. Landlords must provide you with a habitable residence, meaning the timely resolution of essential repairs is required. If your essential repairs have gone unresolved, an HP action will protect your tenant rights, as established by the State of New York.
Succession Rights
Establishing Succession Rights passes your rent-controlled or rent-stabilized lease along to an assigned successor, but Succession Rights are not guaranteed. When you are ready to move to your next residence, you may want to pass along your lease to your roommates or family members looking for a safe and affordable residence.



“We were very satisfied with Sean B. Oster’s assistance. Mr. Oster displayed a very professional and caring manner. He was at all times courteous and very open to all our questions. We would highly recommend him to others interested in his services.”

A.M. & R.M.

“Sean Oster was an excellent attorney in executing a new will for me. He made the process very easy, and was always available via phone and email to answer questions. Even after the will was signed, he was still available to me for follow up questions. His style gave me a lot of confidence and the process was short and sweet! Thank you Sean!”


“Mr. Oster was proficient and helpful in all aspects of my project to which he was assigned. He was always courteous and knowledgeable about points of the law with which I was not familiar. This young attorney should go far in his chosen profession.”


“I think everyone gets nervous at the prospect of making a Will. And it is essential to have a knowledgeable and compassionate attorney to help with all the questions and decisions that arise. Thankfully, I found Sean B. Oster. He was easy to speak with, generous with his time, well-informed and professional. I recommend him highly.”



Attorney Sean B. Oster

There are many times in life when the need for legal representation will arise, and it is our goal to make such times as stress-free as possible. We are passionate about the law, and here to help you navigate the complicated legal process.

As a boutique law firm, we ensure that each of our clients are of equal priority. Our goal is always to identify the best solutions for your individual needs. Whether you are planning for the future with Wills and Health Care Proxies, negotiating Divorce and Child Custody, or protecting your rights as a Landlord or Tenant—I will be by your side from start-to-finish

Call us today at (800) 840-7858 for a free 15-minute initial phone consultation.*

The Law Office of Sean B. Oster, P.C.

276 5th Avenue
Suite 704-3018
New York, N.Y. 10001
(800) 840-7858

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Disclaimer: The information on this website is for general informational purposes only. Nothing on this website, or emails, or other communications should be taken or construed as legal advice for any individual case, situation, or any subject manner. The information on this website is not intended to create, and receipt or viewing of this information does not constitute or create, an attorney-client relationship. Contacting Mr. Oster solely via phone, contact form and/or email, does not by itself constitute an attorney-client relationship.

Use of our online form does not constitute an attorney-client relationship. In order for you to form an attorney-client relationship with our Law Office both sides would have to sign and execute a Retainer Agreement.

* The free 15-minute initial phone consultation is for the attorney to determine if he can take your case and to provide you with a cost of their attorney’s fees. The lawyer will not advise you of what you can do in your case without a contract. The attorney does not represent you until we sign a contract with you.

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