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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon39
    Verified custom home building reviews

Top-Rated Custom home builders in Islip - Updated Nov 2026

Avatar for Arthur DeRosa Building and Remodeling
Arthur DeRosa Building and Remodeling
4.7(
13
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

Approved

In business since 1986

Free estimates

Customers say: True professional

"There are not many people in today’s world that really cares about how they are perceived . A true craftsmen is honorable and able to listen. Quality and precise precision make every job memorable . Arthur takes pride in everything he does. You could not find a better construction company , run with complete honesty and quality work. Doesn’t forget his patience and caring for what his customer wants. Hire this amazing company…you will not regret it. Your satisfaction gives him joy in his craftsmanship ?"
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+20

Response time2 days
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Raza & Sons Construction, Inc.
Raza & Sons Construction, Inc.
5.0(
2
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

Platinum Construction is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with more than 6 years of experience serving Brooklyn, NY and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

Response time1 day
Recommended by100%of homeowners
Avatar for Diamond Craft Builders, Inc.
Diamond Craft Builders, Inc.
New to Angi
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

Approved

In business since 1992

Free estimates

Offers commercial services

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

Avatar for Classic Construction Inc.
Classic Construction Inc.
5.0(
24
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

In business since 2004

Free estimates

"Classic Construction was the last of 4 estimates I was getting for various work we wanted done. Frank spent close to two hours with us that night going over everything. He was the ONLY person to make suggestions to us that actually made more sense. Frank was at my home when he said he'd be & didn't leave until whatever he was working on was done & everything was cleaned up. I would absolutely recommend Classic Construction.....Frank does beautiful work & he's a really, really nice guy!!"
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+30

Recommended by100%of homeowners
Avatar for MHI Metro Home Improvement
MHI Metro Home Improvement
4.7(
29
)
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Serving Islip, NY and surrounding areas

In business since 2007

Free estimates

"We hired MHI Home Improvements to renovate our entire Kitchen in Bethpage, NY. We are so happy with the work ethics and final product. His staff would sweep every day before they ended for the day and make sure they left everything clean and tart early on time the next day. The entire job was finished timely and we get compliments all the time. My wife and I are more than happy to recommend MHI Home Improvements for any of your home improvments!"
After
Before
Levittown NY
Outdoor
#1

+106

Response time4 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for Kentstruction
Kentstruction
4.6(
40
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

In business since 1981

Free estimates

Emergency services offered

"Gary and the team did a great job. My wife wanted a timber frame look to the front entrance and the guys created an amazing custom look. Gary made some design suggestions along the way, and we think they really enhanced the overall look. This is the 4th or 5th time we have used Kentstruction and I cannot say enough great things about them."
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+17

Recommended by84%of homeowners
Avatar for Jv custom carpentry
Jv custom carpentry
4.6(
129
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

In business since 2012

Free estimates

"I was very impressed with John's knowledge of Carpentry, he had to come up with a solution to replace my linen closet door which was old and did not function anymore , this door could not be purchased at Home Depot etc., John takes pride in his work and I was very happy with the finished product even though it took several months ... John always responded by text to keep me updated about my custom door (back ordered) .. I definitely recommend him .. and will have him back to do other projects for me."
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+78

Recommended by94%of homeowners
Avatar for Al Arsh Construction Corp
Al Arsh Construction Corp
5.0(
10
)
Find a Custom Home Builder

Serving Islip, NY and surrounding areas

In business since 2001

Free estimates

"Malik at Al-Arsh Construction runs a very professional standard. His contracts are accurate, his prices are fair, and his ability to make the scope of the job efficient and cost saving were well communicated. I have utilized him twice for two major projects on my 150 year old home. You open up a wall and discover ten more repairs. But Malik was accurate in his estimates, and any change of orders were for additional work that I requested as I saw the project develop. His suggestions were based on common sense, and I was always comfortable going forward with any change of orders. Malik scheduled the work and came every day, on time and with the same skilled workers. He was on site often, and managed the work and workers' time very efficiently. The projects were done to perfection and detail and to contract. I like contracts. Malik was also very reasonable and was negotiable to labor costs when I wished to purchase materials myself. Like when I wanted to use a certain wallboard and frame. He is very much a Contractors', Contractor. I come from a family of old Italian contractors and they would be proud that I hired Malik to do the work.
"
Recommended by100%of homeowners
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Custom Home Builders FAQs, answered by experts

Whether it’s more affordable to gut a house than build a new one depends on the markets where you'd be buying and selling. However, it’s usually less expensive to renovate a home than to build new construction. 

Most homeowners pay between $100,000 and $200,000 for demolition and remodeling costs, whereas the average cost to build a new home is between $139,000 and $531,300.

Modular homes last an average of between 50 and 75 years, and high-quality modular homes can last for 100 years with proper maintenance. For comparison, a standard home lasts 50 to 100 years and can push to 150 or longer with good maintenance. Modular homes provide better long-term value in that they are significantly more affordable and can last almost as long, but some buyers are wary of modular home longevity, so the actual value if you sell could be lower.

A-frame homes are on the smaller side. While there’s no set square footage amount it has to be, it will usually come in around 1,000 square feet or smaller.

Yes, you can finance new construction, though the process often requires a different type of loan than one for an existing property. There are several financing options available:

  • Construction-to-Permanent Loan: This is a common option where a single loan covers the building costs and then converts into a traditional mortgage once construction is complete and you move in.

  • Construction Loan (Stand-Alone): This type of loan provides funding only for the duration of the construction project. Once the house is built, you will need to pay the loan in full, typically by securing a separate, standard mortgage.

  • Builder Financing: Some custom homebuilders offer their own financing options, which may only require a down payment to begin the building process.

  • Bridge Loan: This can be a useful short-term loan to fund your new construction while you are in the process of selling your old home.

  • Home Equity Options: If you are building a second home, you might be able to use a home equity line of credit (HELOC) or a cash-out refinance on your current property.

It's also important to be aware that some lenders may have restrictions on financing for DIY house builds, so be sure to verify that you can secure financing before starting your project.

A construction-to-permanent loan is the most common type of mortgage used to finance a house teardown and rebuild. These loans include financing for construction costs and convert to a long-term mortgage once construction is complete. Check the terms of the loan closely before beginning work—there are often restrictions requiring you to use licensed contractors for all work.

The Islip, NY homeowners’ guide to custom home building

From average costs to expert advice, get all the answers you need to get your job done.