L J Stone Inc

During our independent research, we found that L J Stone Inc offers countertop fabrication using most of the popular types of natural and engineered stone available in the US. The most commonly used materials include engineered quartz, marble, granite, quartzite, soapstone, and onyx — these are the materials most frequently chosen by L J Stone Inc’s clients in Ontario, CA for kitchens, bathrooms, outdoor areas, and commercial spaces.

If a client requires a less common material, the desired stone is ordered from a supplier, allowing the project to meet the customer’s specific requirements. This approach enables the company to complete both standard and unique designer projects.

According to our research, the company fabricates stone countertops for both residential and commercial spaces. The most in-demand options are, of course, kitchen countertops in private homes, bathroom vanities, as well as outdoor kitchens and BBQ areas. In addition to that, the company manufactures countertops for commercial spaces such as offices, retail stores, hotels, restaurants, and even medical facilities.

Thanks to its experience, L J Stone Inc is ready to fabricate and install stone countertops in virtually any residential or commercial space — even if the specific type of room wasn't mentioned among the most common ones.

Our rating analysts thoroughly reviewed the portfolio of completed projects by L J Stone Inc, which features various types and shapes of stone kitchen countertops fabricated by the company. Among the completed projects are classic straight countertops, L-shaped and U-shaped corner configurations, kitchen islands, and countertops with a breakfast bar.

The examples we studied confirm that the company is capable of fabricating and installing countertops in virtually any shape — tailored to the kitchen layout, design objectives, and customer preferences.

Our research has shown that the company works with the most popular stone countertop styles in the U.S., including modern, traditional, transitional, minimalist, industrial, farmhouse, luxury, and coastal. These styles are currently in high demand among clients across the country.

Our analysts reviewed the company’s portfolio and customer feedback and confirmed that L J Stone Inc successfully handles a wide range of design tasks — from clean, minimalist solutions to luxurious interior compositions featuring expressive stone textures.

The company’s office is located at 1075 W 9th St, Upland, CA 91786, but its work is not limited to just the city of Ontario, CA. Like many participants in our rating, the company accepts orders, provides on-site measurements, and installs stone countertops within a radius of up to 50 miles from its main location — including neighboring cities, suburbs, and residential communities.

If you’d like to confirm whether your location is covered, simply contact the company through our website: submit a request, give them a call, or send a message directly via messenger.

Like many participants in our rating, L J Stone Inc works with a wide range of clients — from private homeowners to professionals in the construction industry. Their clients include families planning a kitchen or bathroom renovation, contractors, developers, and owners of cafés, restaurants, hotels, and other commercial properties where stone countertops are needed.

For interior designers and contractors, L J Stone Inc often offers special partnership terms — such as discounts or priority fabrication timelines. To confirm the details, we recommend contacting the company through our website using any convenient method.

As part of our independent research, we attempted to determine whether L J Stone Inc has its own natural stone countertop fabrication facility. Our analyst contacted the company as a mystery shopper, but unfortunately, we were unable to obtain a clear answer — the calls and messages either went unanswered or did not provide the necessary information.

The absence of confirmed data about fabrication should not be seen as a negative sign. In our experience, it is not uncommon for companies to miss some incoming inquiries or choose not to disclose such details during initial contact.

According to our research, L J Stone Inc does not offer a veteran discount — this information was provided by a company representative during a conversation with our mystery shopper. However, like most companies in our rating, L J Stone Inc may offer personalized terms and discounts on countertop fabrication — especially during national holidays, seasonal promotions, or for large-scale projects.

We recommend confirming the details directly: submit a request, call, or message the company through our website — and be sure to ask about any available discounts. In many cases, contractors are open to discussing individual terms.

According to the assessment of our independent rating, L J Stone Inc in Ontario, CA falls into the category of contractors with an affordable price level. This conclusion was based on our independent mystery shopper research: our analysts contacted a company representative and requested a price estimate for the fabrication and installation of a countertop measuring 83.4 square feet (excluding old countertop removal), using two popular materials — Calacatta Idilio quartz and Carrara Morro quartz.

Based on the estimate received, the cost of the project using Calacatta Idilio quartz amounted to $4160 at a rate of $49.88 per sq. ft., and the cost using Carrara Morro quartz was $ at a rate of $0 per sq. ft. These prices turned out to be among the lowest of all companies in Ontario, CA, which allowed us to categorize L J Stone Inc as a contractor in the affordable pricing segment.

Please note that the data provided reflects the result of a specific request within the framework of our research and may differ for your particular project. We recommend contacting the company directly through our website — submit a request, call, or send a message — to get a personalized quote and confirm current pricing.

Yes, according to our research, L J Stone Inc offers free consultations and project estimates — this is standard practice across the industry. Like most contractors in our ranking, the company provides free on-site measurements, advises on material selection and configuration, and prepares a detailed quote for the fabrication and installation of your stone countertop.

To receive a consultation and a free estimate for your new countertop, submit a request on our website, call the company, or send a message via messenger.

According to our independent research, L J Stone Inc in Ontario, CA offered one of the fastest fabrication and installation timelines for a stone countertop — just 5 business days. Acting as secret shoppers, our analysts contacted the company with a request for the fabrication and installation of a stone countertop measuring 83.4 square feet. A company representative informed us that the entire project could be completed in just 5 business days, which allowed us to categorize this contractor as having a fast turnaround time.

Please note that the timeframe quoted to our secret shopper may differ from what you are offered, as the production timeline depends on many factors — including project complexity, chosen material, and the company’s current workload. We recommend confirming the current timeline directly by submitting a request, calling, or messaging the contractor through our website.

Unfortunately, in the course of our mystery shopper research, we were unable to obtain information about the quote preparation time from L J Stone Inc in Ontario, CA. Our analyst may not have been able to reach a company representative, or the quote was never provided after initial contact. As a result, we are unable to objectively evaluate the company’s quote turnaround speed. This situation is rare and usually related to temporary workload or internal processing specifics. It does not necessarily indicate a low level of service — it simply means that we didn’t receive a response within the research timeframe.

To get up-to-date information, we recommend contacting the company directly through our website — submit a request, call, or message them to receive a personalized quote and clarify current pricing.

Yes, like most professional contractors in the market, L J Stone Inc performs cutouts and countertop preparation for various components — both standard and modern. According to our findings, these services are typically included in the overall project estimate.
The standard scope usually covers cutouts for sinks (undermount, drop-in, or farmhouse) and holes for faucets or other plumbing fixtures. Additional cutouts — such as for cooktops, hidden or pop-up outlets, built-in wireless chargers, or other accessories — are discussed individually at the project planning and estimating stage.

It’s important to note that while the cutouts and countertop preparation are usually performed by the company, the installation of electrical and plumbing fixtures (such as faucets, outlets, or appliances) may not be included in their scope of work and could require licensed professionals. We recommend clarifying this point when placing your order.

To avoid misunderstandings, ask for a detailed estimate with a breakdown of all services: cutout pricing, installation, and any add-on options. This will ensure project transparency and help you clearly understand what you're paying for.

According to our information and industry practice, L J Stone Inc, like most participants in the ranking, provides a workmanship warranty valid for 1 year from the date of countertop installation. This period is usually specified in the contract. We do not rule out that the company may have extended warranty terms (2 years or more), however, during our research, we did not receive confirmed data from the contractor regarding the duration and scope of its warranty.

The contractor’s warranty covers defects in fabrication and installation, such as uneven or separating seams, leveling and fastening issues, detachment or sagging of an undermount sink, flaws in edge finishing and cutouts, premature failure of seam materials, and cutouts that do not match the approved design. Warranty coverage does not include damage from use (thermal shock/burn marks from hot cookware, chips or cracks caused by impacts), stains and acid etching (for marble), wear due to insufficient maintenance or lack of sealing, natural characteristics of stone (veins, micro-pores, variations in shade/pattern within tolerances), shifts caused by base deformation, or any modifications performed by third parties.

The material warranty is provided by the manufacturer or the official stone supplier. Engineered quartz brands often offer a limited “lifetime” warranty for residential properties (subject to registration and compliance with care guidelines). For sintered surfaces, typical warranty periods range from 10 to 25 years. Natural stone usually does not come with a factory warranty — its quality of fabrication and installation is covered by the contractor’s warranty.
The term and scope of the warranty depend on the project and materials — contact L J Stone Inc in any convenient way on this page to get the current terms.