Local Expert in Long Island for Basement Finishing & Remodeling

Zavza Seal is a premier local basement finishing service and basement remodeling service provider with a wealth of experience near you in Long Island communities including Suffolk, Nassau, Brooklyn, and Queens.

Our team of experienced and licensed professionals is dedicated to providing high-quality basement finishing service and  basement remodeling services that are tailored to meet the specific needs and requirements of each homeowner.

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Taking Care of Your Basement is Our #1 Priority

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Is it worth finishing a basement?

A finished basement provides additional foundation support.  Sadly, many homeowners put off finishing the area because they think it will be a laborious project and often back out after thinking about the high basement finishing cost. Quality work on the foundation goes a long way, and not all projects are the same. The finish work you require will depend on your basement needs, which will differ from what someone else is getting done.

Many homeowners also don’t realize the advantages of finishing their basements. So here is a list of them:

It provides safety

Basement finishing improves security, gets rid of smelly odors, and invasive pests. Unwanted and even dangerous intruders can easily enter an unfinished basement. One such example is radon saturation. Radon gas is a severe issue since it can leak through unfinished basement walls and floors, impact your health, and cause cancer.

Unfinished basements are prone to musty, moldy, and earthy scents that are difficult to mask. Necessitating homeowners to get mold removal services. Using basement dehumidifiers may not solve the problem, that’s why getting professional help is important. Additionally, these effects make your home more vulnerable to pests like rodents, insects, and other pests. The risk of these problems will significantly decrease or eliminate by remodeling the basement.

Gives you more creative freedom

If local zoning regulations forbid an extension to the rest of your house, here is a technique to add living space. Of course, if you decide you need more space, it might not be possible for you to expand your structure where you live. But neither neighbors nor laws are affected by your basement; for individuals who require space but have nowhere else to go, basement finishing is the ideal solution.

Adds value to your home

Even though home improvement projects can be pricey, they are ultimately worthwhile. If you intend to sell your house, having a completed basement will make it appear more appealing to potential buyers. Since you previously put in the work, the buyer won’t have to upgrade the cellar. An older house can be more contemporary by adding more modern features, which can increase appeal. Since your home’s resale value is likely to soar, you must have faith that you will recover the money you spent completing your basement. A basement restoration project may be just as alluring to purchasers as a bathroom or kitchen remodel.

In the long run, it saves you extra costs

A finished basement will also enable you to save money. Typically, it would help if you only used your air conditioner and heater to regulate the temperature of your basement because unfinished basements lack sealing. When your basement is finished, your appliances won’t have to work as much, resulting in lower energy costs. Additionally, finished basements are typically less expensive than above-ground expansions. This is because they don’t need to extend the house’s exterior, unlike when building a new room requires starting from scratch. They are instead redesigning an existing area.

Steps involved in finishing a basement

The following steps are involved in our basement remodeling process to add a complete look and feel to the basement.

Finish the basement’s walls

We’ll start here if your basement’s walls are just plain concrete. When the drywall is painted, and the insulation is placed, finished basement walls will make the room look finished, warm, and inviting. After building your walls, we will then hang your drywall. We will also use waterproofing cement if you have moisture issues.

Finish the basement floor

Due to the potential for flooding and exposure to water, basements require different flooring than other rooms in the house. Waterproof or water-resistant floors make for the greatest basement surfaces.

Finish the Basement Ceiling

We must conceal the wires, vents, and pipes visible on your basement ceiling while allowing access to them as necessary for a finished look. Depending on your basement’s needs, we will install either a drop ceiling or a drywall ceiling.

Install Egress Windows

An egress window is a window made to be big enough for an adult to climb in or out of as an emergency escape route and serves as a point of entry for firefighters and other emergency services. You’ll also have extra light if the basement window is big enough, so installing egress windows is necessary.

Why Hire Us?

We focus only on waterproofing and insulation services


We focus only on waterproofing to ensure you work only with the best

We use only high quality products for basement finishing

Quality Products

We use only high quality materials to ensure years of uncompromising performance

Our basement finishing service is very cost effective

Cost Effective

We deliver quality waterproofing service at reasonable prices

We provide five star services

5 Star Service

Our team is committed to delivering 100% customer satisfaction

What’s Next?

Request a free estimate

Request a Consultation

Schedule a consultation now and share with us your needs

Schedule a consultation

Schedule a Meeting

We set up a phone call and a subsequent meeting on location to understand the size of your project

Request a quote / contract

Quote / Contract

We deliver a quote for your work and if you agree provide a contract to start the job

We do the service requested


Our team of experts performs the work on location

100% customer satisfaction assured

100% Satisfaction

Our project manager ensures you are completely satisfied with the results

5 Star Google & Home Advisor Reviews

100% Google's Five Star Reviews
100% Home Advisor Five Star Reviews


Five Stars Reviews 1

Annette Casatelli

I received a few quotes to get the walls in my home filled in with blown in insulation. Zavza Seal was affordable and they did an excellent job.

They were very concerned with cleaning up, which I appreciated. I felt the difference in my home immediately. No more freezing cold walls. I recommend them, hands down.

Five Stars Reviews 2

Noemi Herles

Our experience with Zavza Seal was wonderful and smooth. The crew is well organized. They listen to your plans. They showed out in time. They left everything clean. They did an amazing job! I highly recommend this company.

Five Stars Reviews 3

Ellen Szuchmacher

Efficient, courteous and responsible workers. The job was quoted as being completed in 2 days but more work was required and they returned on the 3rd day and completed the job without additional charges. They reinsulated my crawlspace (not an easy job). I recommend Zavza Seal without reservation.

Five Stars Reviews 4

Michael Rutigliano

Couldn’t be more satisfied with the job Zavza Seal did. Brendan and Jake were accommodating, fair and extremely knowledgeable. Their team worked incredibly hard that day under difficult conditions and did a great job. I manage a multi-unit HOA and we will definitely be using them again.

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