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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

"Arthur gave us a fair and competitive estimate and was able to start work quickly thereafter. He and his team did an excellent job gutting and totally remodeling two bathrooms and a closet as well as redoing some of the wood flooring, moving vents, and moving hallways. Arthur himself was at the home everyday and did the important work himself. He also went the extra mile in helping us with small projects around the major project as they came up. He was extremely responsive in provided us with timely updates. When complications occurred (due to the house having not been renovated in 40 years) he was clear and helpful in keeping the project on schedule. He was extremely honest and I trusted him to be alone in my house for weeks on end with his team. I would/plan to work with Arthur again in the future for my home renovation projects."
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+20

Response time2 days
4 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

"Romeo performed an emergency roof repair and dealt with the problem to it's conclusion. He is a man of his word. I subsequently hired him to do brickwork on my home. Both jobs were done professionally to my satisfaction. I recommend Romeo."
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
)
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Serving Islip, NY and surrounding areas

In business since 1981

Free estimates

Emergency services offered

"Once we hired Kentstruction to do our job, Kent told us he would start in 4 weeks and that's exactly when they came. The job was done quickly and efficiently. Kent and his brother Eban were so helpful when it came to making decisions on products and designs. They were always timely and professional and the work they did was excellent. We will hire them again for our next home improvement,."
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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
)
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Serving Islip, NY and surrounding areas

In business since 2001

Free estimates

"Wonderfully. The Al-Arsh crew is always reliable, prompt, professional and highly-skilled. Their work is always done exceptionally well and the owner, Malik, always makes sure it is finished to perfection. Even when we needed something tweaked or if plans changed after they finished, they come and do whatever is needed when needed, cheerfully. Their prices are more than fair and they guarantee their work. We have had Al-Arsh do work for us over the years totaling at least $250K and we ALWAYS chose them."
Recommended by100%of homeowners
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Custom Home Builders FAQs, answered by experts

Yes, you can finance cottage construction through several options. Construction loans provide funds in stages as work progresses, while home equity loans or lines of credit are available if you have existing property. Some lenders offer a combined construction and permanent mortgage. Always review loan terms and payment milestones before committing.

Modular homes can be a great investment, especially for those who find the prices of stick-built real estate too high. Modular homes are usually much more affordable because they’re mass-manufactured and then assembled on-site or delivered mostly assembled. If they’re installed properly and by professionals, they can last for between 50 and 100 years, potentially making them an outstanding investment.

The early stages of building a house are harder than the later stages; laying the foundation and framing the house are two of the most challenging steps. However, it varies for everyone. Some people have difficulty installing HVAC, plumbing, and electricity, while others find it harder to plan the house and secure the necessary permits. 

A construction manager is particularly useful in the case of a large-scale build with custom design elements, so it’s usually worth it to hire one. They can help manage your budget, maintain quality control, oversee timelines, and navigate unexpected hurdles. While construction managers are pricey, they can actually save money in the long run by identifying cost-saving opportunities and ensuring the project stays within budget.

Builder-grade is one of two types of stock cabinets, whereas semi-custom designs allow homeowners some control over the color, finish, or hardware on their cabinets. Stock cabinets are sold in construction-grade and builder-grade designs. Construction-grade cabinets are usually made from inexpensive medium-density fiberboard, which is prone to moisture damage, whereas builder-grade models are a step up with higher-quality materials. Construction-grade designs are the most common type of cabinets in America.

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.