Undermount Sink Cutouts and Installation

Professional undermount sink cutouts and installation requires precision, specialized equipment, and extensive experience working with natural and engineered stone surfaces. The difference between amateur and expert installation becomes immediately apparent in both appearance and long-term durability, making professional service essential for achieving flawless results.


LA Custom Granite Quartz Marble Countertops brings years of specialized expertise to every sink installation project throughout Los Angeles. Our master craftsmen understand that proper undermount installation involves much more than simply cutting a hole – it requires precise templating, structural support planning, and meticulous attention to sealing and finishing details.


Whether you're installing new countertops or retrofitting existing granite, quartz, or marble surfaces, our team handles each project with careful consideration of your specific sink dimensions, countertop thickness, and cabinet structure. We use diamond-blade cutting tools and professional-grade mounting systems to ensure clean, chip-free cuts and secure, long-lasting installations.


Our comprehensive approach includes proper reinforcement techniques, waterproof sealing, and thorough testing to prevent future issues like sink sagging or water damage. From initial consultation through final cleanup, we maintain strict quality standards that protect your investment and deliver the seamless, professional appearance that undermount sinks are designed to provide. The result is a beautiful, functional installation that enhances your kitchen's value and usability.

Our Undermount Sink Cutouts and Installation Services

We focus on exact sink cutouts tailored to granite, quartz, and marble slabs, ensuring a perfect fit. Our installation process guarantees secure, long-lasting undermount sinks compatible with various styles and materials.

Precision Sink Cutouts for All Materials

We use advanced tools and digital templates to create precise cutouts. Each sink cutout is measured and cut to match the sink model and slab thickness exactly.


This minimizes the risk of cracks or uneven edges. We also consider stone type to adjust cutting techniques and reduce chipping.


Our process includes polishing the cutout edges to ensure smooth, clean finishes that blend seamlessly with the countertop.

Expert Installation

We anchor sinks securely to provide durability and support for everyday use. Our team uses corrosion-resistant clips and high-quality adhesives tailored to stone countertops.


Installation includes testing for leaks and alignment accuracy. We ensure the sink sits flush against the counters with no gaps or water intrusion points.


We handle plumbing connections carefully to avoid damaging the countertop material or sink during the process.

Compatible Sink Styles and Options

We install a wide range of undermount sinks, including stainless steel, composite, and fireclay models. Our expertise covers both single and double bowl designs.


Our approach adapts to different rim profiles and sink depths to fit the cutout perfectly. We also accommodate custom sinks when needed.


We help customers select sinks that complement their countertop material and kitchen layout for optimal function and appearance.

Project Planning and Installation Details

We ensure precise preparation and clear communication at every step. Our process covers exact measurements, smooth countertop integration, and efficient scheduling to meet your needs.

Custom Measurements


We begin with on-site measurements to capture the exact dimensions of your undermount sink and countertop space. This prevents errors and ensures a perfect fit.


During consultation, we discuss sink models, material types, and edge profiles to tailor the cutout specifications. We also consider plumbing clearances and cabinet structure.


Our experts use specialized tools to record detailed measurements and confirm them with you before fabrication. This reduces the risk of modifications during installation.


Seamless Integration with Countertops


Our installation methods prioritize a flush, clean look where the sink meets the countertop. We use industry-approved adhesives and supports to secure the sink firmly.


We carefully align the sink under the countertop to avoid gaps and ensure water flows into the basin without pooling. This step is critical for durability and aesthetics.


Seam finishing is tailored to your chosen material—granite, quartz, or marble—maintaining the countertop's natural beauty while providing long-lasting strength.


Lead Times and Scheduling 


We schedule installations based on project complexity and material availability. Typical lead times range from 7 to 14 business days after measurements.


Before installation, we confirm all materials are on site and your plumbing is prepared. We coordinate with your schedule to minimize disruptions.


Our team provides clear timelines and updates, ensuring transparency throughout the process. Prompt communication helps us deliver on agreed dates without unnecessary delays.

Why Choose LA Custom Granite Quartz Marble Countertops

We specialize in precise undermount sink cutouts tailored to your specific countertop material. Our experienced team understands the nuances of granite, quartz, and marble to ensure a perfect fit.


Our commitment to quality is reflected in every project. We use advanced tools and techniques to minimize damage and maintain the integrity of your countertop. We offer consistent, reliable service with clear communication throughout the installation process. You can expect punctuality, professionalism, and attention to detail.


We prioritize customer satisfaction by addressing questions promptly and providing transparent pricing. Our team guides you from consultation through final installation smoothly. Choosing us means working with a company dedicated to high standards and lasting results. We ensure your undermount sink is securely fitted for both function and aesthetics.

Frequently Asked Questions (FAQs) About Undermount Sink Cutouts and Installation


  • How much does undermount sink installation cost in granite countertops?

    Undermount sink installation in granite countertops typically ranges from $200 to $600, depending on the sink size, granite thickness, and complexity of the cutout. LA Custom Granite Quartz Marble Countertops provides detailed quotes based on your specific sink dimensions and granite type. Additional factors like reinforcement requirements and accessibility can affect the final cost, which we'll discuss during your consultation.

  • Can you cut undermount sink holes in existing quartz countertops?

    Yes, we can cut undermount sink holes in existing quartz countertops using specialized diamond-blade tools and dust collection systems. The process requires precise measurements and professional-grade equipment to prevent chipping or cracking. We take extra care to support the countertop during cutting and ensure proper sealing around the new cutout to maintain the integrity of your existing installation.

  • What's the best way to install undermount sinks in marble?

    Installing undermount sinks in marble requires extra care due to the stone's softer nature. We use diamond-tipped cutting tools, proper support brackets, and high-quality adhesives specifically designed for natural stone. The key is creating smooth, precise cuts while providing adequate structural support to prevent stress fractures. We also apply protective sealers around the sink area to guard against water damage.

  • Do you provide undermount sink cutouts for kitchen remodels?

    Absolutely,LA Custom Granite Quartz Marble Countertopsspecializes in undermount sink cutouts for kitchen remodels throughout Los Angeles. Whether you're upgrading from a drop-in sink or installing new countertops, we handle the entire process from templating to final installation. We work with your existing plumbing layout or coordinate with contractors for any necessary adjustments.

  • How long does undermount sink installation take to complete?

    Undermount sink installation typically takes 2-4 hours to complete, depending on the countertop material and sink complexity. This includes precise measuring, cutting, fitting, and sealing. For existing countertops, we may need additional time for preparation and cleanup. We schedule installations to minimize disruption to your kitchen routine and ensure everything is properly tested before we finish.