Nail Extensions NYC – Custom Sculpted Nails in FiDi
We create custom gel nails for every client - precision-shaped, ultra-strong, and always finished with a Russian manicure for a flawless look.
What Are Gel Extensions?
Gel Nail Extensions are the most modern way to achieve strong, beautiful, and perfectly sculpted long nails. Unlike classic tips, we use professional sculpting forms and builder gel to create length and shape directly on your natural nail. At Mars Nails, every extension is custom-cut and sculpted to fit your unique nail and desired shape—almond, oval, square, stiletto, and more. This allows for the most natural and elegant look, fully tailored to your style.


Why Choose Gel Nails Extensions in NYC?
- Perfect length and shape tailored for each client—no plastic tips, only hand-sculpted extensions
- Ultra-strong and flexible - structered gel protects your nails from breaks and chips
- Lightweight and natural-looking, comfortable to wear
- Hypoallergenic professional gels only
- Lasts up to 4-5 weeks with proper care
- Supports creative nail art, French, nude, or any style you want
Every Gel Nail Extensions service at Mars Nails includes a complete Russian manicure for a flawless foundation. Our Russian manicure technique guarantees a perfectly clean cuticle, smooth nail plate, and a healthy base for extensions.
- Precision cuticle work and nail preparation (Russian manicure)
- Individual sculpting: each form is cut and fitted for your nail
- Professional builder gel application for shape and strength
- Sculpting, apex building, and smoothing
- Color gel polish or a nude/glossy finish
- Final shaping, buffing, and nourishing care

How Long Do They Last?
With proper aftercare, gel nail extensions will last around 4-5 weeks without chipping or lifting. After this time, you’ll need to come back for a refill to keep your nails looking fresh and natural.
If you book your next appointment within 4-5 weeks, you can select the
Builder Gel Manicure
service for a maintenance refill (no need to re-do extensions).
If more than 6 weeks pass between appointments, a new full set of gel extensions may be required.
Extension Pricing in our Nail Studio
At Mars Nails, we specialize in custom sculpted gel nail extensions - a meticulous, hand-crafted service that delivers the most natural and elegant results. Because every set is fully tailored to your nail shape, length, and style preferences, each appointment includes detailed consultation, advanced Russian manicure, custom form sculpting, and high-quality, hypoallergenic gels.
Due to the high level of expertise, time, and quality materials required for this service, the price for a full set of custom gel nail extensions at Mars Nails is $230.
If you have specific design requests (French, ombré, nail art, or unique shapes), please mention them when booking - we’re happy to bring your vision to life!
Refills and maintenance appointments are available at a lower price within 4–5 weeks of your initial service. Please contact us if you have questions about pricing or want to schedule your custom gel extensions in NYC.
Frequently Asked Questions
Are gel nail extensions safe for my nails?
Yes! We use hypoallergenic gels and gentle techniques to protect your natural nails at every stage.
Do you do gel nail extensions in your nail salon?
Yes, we absolutely offer gel nail extensions at our salon in the Financial District (FiDi), Manhattan! At Mars Nails, gel extensions are one of our signature services. Every set is custom-sculpted and tailored to your unique style and nail shape.
Can I get nail art or creative designs on my extensions?
Absolutely! Extensions are the perfect base for any type of nail art or creative look. Be sure to explore our full range of Nail Designs to see what’s possible.
If I book a refill within 4-5 weeks, do I need to choose Nail Extensions again?
No, if you’re returning for maintenance within 4-5 weeks, simply book our Hard Gel Manicure service. This is a professional refill for existing extensions—no need for a new full set!