Contractors You Can Trust

Authorized Contractors you can trust

Choosing the right contractor for your project is the most important decision of all because even the best materials can be spoiled by poor installation and workmanship.

That’s why we developed the Unilock Authorized Contractor program, designed to help homeowners connect with professional contractors who can be trusted to do the job right. Unilock Authorized Contractors are part of an elite group whose work and business practices have met demanding standards. We conduct on-site inspections of the contractor‘s work and client satisfaction reference checks before a contractor is considered for the program, and these inspections continue annually*. All Unilock Authorized Contractors offer a minimum two year guarantee on their workmanship.

Unilock Peace of Mind Guarantee

In fact, Unilock believes so strongly in the quality of the workmanship and integrity of contractors in the program, that should a Unilock Authorized Contractor be unable or refuse to fulfill their warranty obligations Unilock will step in and back their warranty**.


The contractor you hire should have technical, business and interpersonal skills, as well as the tools and the experience needed to complete your paving stone and/or retaining wall project. Finding contractors who are experienced in installing landscape projects similar to yours, is one of the best ways to narrow down your final selection. These contractors will know what materials and techniques are needed for your landscape installation and will most likely have the labor and equipment to do it right.

A great contractor will provide:

  • Written quote for your project
  • A detailed drawing and/or computer rendering of your project containing all of the features that you requested
  • Approximate start date
  • A reasonable estimate of the time required to do the job
  • References from homeowners with similar projects
  • When comparing quotes, make sure that you compare on an apples-to-apples basis and understand service levels; cheapest is typically not the best choice
  • A written confirmation of your contract with their installation guarantee clearly stated
  • Proof of liability insurance and workers compensation coverage

Questions you should ask…

You won’t offend reputable firms with questions. If a contractor doesn’t seem to know the answer to many of your questions or seems to avoid answering them, you may have the wrong contractor.

  • How long have they been in the landscape business?
  • Do they have liability insurance and are they covered by Workers’ Compensation?
  • Do they have the appropriate licensing for their work?
  • What landscape jobs have they done that are similar to what you need done?
  • Do they have a list of references?
  • What is their landscape training and background?
  • How are their employees trained?
  • Do they attend manufacturer training sessions?
  • What warranty do they offer?
  • Do the products they recommend have a warranty?
  • Do they do the entire job with their own staff or subcontract parts out?
  • Who are their subcontractors?
  • Are there any permits required for this job?
  • Whose responsibility is it to get these permits?
  • What is their timeline for your project?
  • What is their clean-up routine?
  • Do they provide a written contract?
  • What are their payment terms?
  • Do they have a website?

References are very important. A satisfied customer is the best reference you can get. Get three or four references for installations they have done which are similar to yours. Phone these references and see if their experience was a positive one. If possible, ask if you can come out and see the work.

Finally, be aware that you will be working with this individual over a period of several weeks and you’ll need to get along. Select a contractor who is personable and who is willing to work with you in achieving the job that you’re after within your budget.

For more information about how to prepare for your project, download our Before you Start guide here.

Before You Start Looking For A Contractor

*A sample of jobs is inspected annually.

**The Unilock Authorized Contractor Workmanship Guarantee covers major structural failures of residential installations where 100% of the product used is Unilock for a period of two (2) years from the date of installation. Minor settling or aesthetic imperfections are excluded, as are issues which arise due to unknown soil or groundwater conditions beneath the prepared base.