CoPLS.com = Colorado Professional Land Surveyors Colorado Engineering & Surveying provides land surveying services for real estate transactions, one of our most important is the ILC - Improvement Location Certificate. In a Real Estate transaction the ILC is an import document, potentially revealing encroachments that are onto or off of the property. In Colorado, an ILC is a great start, which might be all you need. But it might reveal you need a full Survey. Whether you need a full Survey or only a Colorado ILC, Colorado Engineering has been providing these services for almost 40 years. Land surveying services to the Metro Denver Area of Colorado since 1972 Visit our company web site for detailed information concerning the ILC and other services