Born from Colorado Soil: AGT Landscape & Design in Longmont, CO
AGT Landscape & Design is a locally owned, full-service landscape company based in Longmont, Colorado, serving homeowners, builders, and commercial properties across Boulder, Larimer, and Weld Counties. Founded by principal Alex Tanner, AGT was built around a single idea: that great landscaping in Northern Colorado requires more than a shovel and some sod. It requires a deep understanding of clay-heavy soils, relentless freeze-thaw cycles, high-altitude UV exposure, and the water-use ordinances that govern communities from Boulder to Fort Collins. Everything AGT does, from the first site visit to the final maintenance visit of the season, is guided by that regional knowledge.
Our Approach
One Team. One Process. Zero Hand-Offs.
AGT operates under a Design-Build-Maintain model, meaning the same local team that draws your 3D site plan is the same team that laser-grades your yard to within a quarter inch and returns each spring to activate your irrigation system. This continuity is not a marketing phrase; it is how AGT protects your investment. When a single contractor owns the entire project lifecycle, from rough-grade to weekly mowing, there are no gaps between what was designed and what was built. Drainage is engineered correctly the first time. Soil amendments, including compost, expanded shale, and mycorrhizal inoculants, are applied before hardscape goes in. The result is a landscape that performs the way it was planned, season after season, across the Front Range's demanding climate. AGT backs that performance with a 2-year warranty on hardscape and irrigation installations, double the industry standard.
8+
YEARS IN BUSINESS
Our Standards
Professional Credentials Built for Northern Colorado's Toughest Projects
AGT holds $5 million in general liability coverage, and every crew member carries an OSHA 10 card. For commercial clients managing HOA communities, office parks, and retail centers, AGT provides GPS-tracked crews, and performance dashboards that document water savings and completed work tickets. For residential clients navigating HOA design-review meetings or municipal water mandates like Boulder's 1041 requirements or Fort Collins Water Wise, AGT manages the paperwork, attends the reviews, and delivers CAD-based as-built plans upon project completion. The company dispatches from Longmont and Berthoud, keeping response times tight across its full service area, which includes Boulder, Erie, Lafayette, Louisville, Superior, Lyons, Loveland, Fort Collins, Windsor, Johnstown, Firestone, Niwot, and Broomfield.
Common Questions
What People Ask Before Working with AGT Landscape & Design
What areas does AGT Landscape & Design serve in Northern Colorado?
AGT Landscape & Design is based in Longmont and Berthoud, Colorado, and serves Boulder, Larimer, and Weld Counties. Key cities in our service area include Boulder, Longmont, Erie, Lafayette, Louisville, Superior, Lyons, Loveland, Fort Collins, Windsor, Johnstown, Firestone, Niwot, and Broomfield, as well as the northern Denver metro. If you are unsure whether your property falls within our service area, reach out and we will confirm quickly.What does the Design-Build-Maintain process mean for my project?
It means the same team handles your project from the first site visit through ongoing maintenance. We do not hand your project off to a separate installer or maintenance crew. The team that analyzes your soil and drainage grades is the team that builds your patio and activates your irrigation each spring. This eliminates scheduling gaps, miscommunication, and liability hand-offs that occur when separate contractors are involved. It also means we have a direct stake in the long-term performance of everything we install, which is why we back our work with a 2-year hardscape and irrigation warranty.How does AGT handle clay soil and freeze-thaw conditions on Front Range properties?
Clay-heavy soil is one of the most common challenges on Front Range lots. It drains poorly, expands with moisture, and can damage foundations and hardscape if not addressed correctly. Before any installation, we amend soil with compost, expanded shale, and mycorrhizal inoculants to improve drainage and root health. We laser-grade every site to a tolerance of plus or minus 0.25 inches to prevent water from pooling near foundations. For hardscape, we specify Belgard pavers and Colorado buff flagstone with properly prepared base materials rated to handle the region's 70 to 90 annual freeze-thaw cycles.Can AGT help with HOA approval and municipal water-use requirements?
Yes. We prepare and submit HOA compliance documentation, attend design-review meetings when needed, and deliver water-use reports that satisfy requirements like Boulder 1041 and Fort Collins Water Wise. For new construction clients, we manage permit applications and coordinate with municipalities to keep projects on schedule. Our 3D renderings also speed up HOA approvals by giving review boards a clear picture of the finished design before construction begins.What warranty does AGT offer on its landscaping installations?
AGT backs all hardscape and irrigation installations with a 2-year warranty, which is double the one-year standard common in the landscaping industry. This warranty reflects the engineering precision behind every project, including proper soil amendment, precision laser-grading, and the use of materials specified for Colorado's climate. For sod installations, we provide a 2 to 4 week rooting guarantee on locally grown, fresh-cut bluegrass. Our confidence in the warranty comes from the fact that we also maintain the properties we build, so we have every incentive to get the installation right the first time.How much can smart irrigation reduce my water bill in Colorado?
EPA WaterSense smart controllers paired with weather-based sensors and soil-moisture data can cut residential outdoor water use by 38 to 40 percent compared to conventional timer-based systems. For commercial properties that convert to xeriscape designs, water reductions of up to 60 percent are achievable. Smart irrigation audits, which we offer as a mid-season service, can identify inefficiencies in existing systems and lower water bills by up to 30 percent. Given Colorado's water restrictions and the cost of outdoor water use during summer months, these savings add up quickly across a single season.Does AGT work with production home builders and new construction projects?
Yes. We regularly work with production builders and custom home developers across Northern Colorado. New construction landscaping requires tight coordination with finishing trades to hit Certificate of Occupancy deadlines, and our Design-Build model is built for exactly that kind of schedule pressure. We handle site grading to precise tolerances, HOA compliance submittals, and all required documentation including CAD-based as-built plans showing valve locations and sleeve routes. Foundation Finish packages for new builds start at $8,000 to $10,000, and full yard designs range from $25,000 to $40,000 and above.What does commercial maintenance include, and what property types does AGT service?
AGT serves HOA communities, office parks, retail centers, and municipal campuses across Boulder, Larimer, and Weld Counties. Commercial maintenance includes weekly mowing, aeration, overseeding, and organic fertilization during the April through November season. We also provide 24/7 snow removal, de-icing, and storm monitoring throughout the winter. Commercial clients receive performance dashboards that track water savings and work tickets, and our crews carry OSHA 10 cards and operate under $5 million in general liability coverage. Our battery-powered equipment fleet makes us a strong fit for noise-sensitive locations like medical campuses and high-density residential communities.
