Guaranteed Excellence Landscaping
Transforming Denver Metro landscapes since 1994, combining a passion for plants with expert horticultural knowledge to create beautiful, low-maintenance outdoor spaces.
Why Choose Guaranteed Excellence?
Since 1994, Guaranteed Excellence Landscaping has helped homeowners and businesses across Denver and the Front Range bring their outdoor spaces to life. With over 30 years of experience and a deep passion for landscaping, our expert team delivers custom, high-quality designs—from patios and retaining walls to full-scale landscape transformations. We listen closely, build with precision, and always aim to exceed expectations. Whether you’re dreaming up something bold or timeless, you can trust Rafael and the team to make it happen—beautifully and affordably.
Customized Solutions
We collaborate closely with clients to design landscapes that reflect their individual values and preferences, ensuring each project is as unique as the people we serve.
Expert Team
Our professionals bring decades of experience and specialized knowledge to every project, utilizing the latest tools and techniques to deliver exceptional results.
Comprehensive Services
From patios and retaining walls to irrigation and xeriscaping, we offer a wide range of services to meet all your landscaping needs.
Professional Landscaping Services
For over 30 years, Guaranteed Excellence Landscaping has been Denver’s trusted choice for high-quality, professional landscaping services. From custom patio designs and retaining walls to artificial turf, landscape lighting, irrigation, and tailored landscape design—we bring every element together. Whether you’re planting new trees, trimming old ones, creating a drought-tolerant xeriscape, or dreaming up a full outdoor transformation, our experienced team delivers stunning results with expert care and a seamless process.

Irrigation
Without Water There is No Life

Landscaping
Your Amazing Outdoor Space

Landscape Design
Install the Amazing at the Intersection of Design and Skilled Craftsmanship

Landscape Lighting
Without Light, Beauty is Undiscovered

Patios
The extension of you and your living space

Retaining Walls
To protect bridge and beautify

Tree Services & Care
Imagine a world without trees - we can't!

Turf Space
Luxury Green Space

Xeriscaping
Maximum Beauty with Minimal Water
We Proudly Work With These Vendors






Check Out Our Google Reviews!
Our Values are to Install Plants and Hardscapes Suited to Colorado’s Climate that Provide Maximum Color, Beauty, Functionality, Durability and Usability that Matches Your Values and Budget.
Frequently Asked Questions
Yes, plants for 6 months from installation as long as proper watering and care are taken into account.
Free estimates and visits for our sales team — Designs can be simple (free of charge) or full CAD drawings to scale (design cost incurred)
The best materials for building an outdoor patio in Denver’s climate include concrete, natural stone like flagstone, and pavers. These materials can withstand temperature fluctuations and are durable.
To ensure your outdoor landscape thrives, choose drought-tolerant plants native to Colorado, use efficient irrigation systems like drip irrigation, and apply mulch to retain moisture.
The best time to start landscaping projects is during spring or early fall when temperatures are moderate, allowing plants to establish roots before extreme weather conditions.
Yes, you may need permits for an outdoor patio installation or significant landscaping changes. Its essential to check with local zoning regulations and obtain necessary approvals before starting work.
Xeriscaping with native plants, using rock gardens, installing artificial turf, and incorporating hardscapes such as patios or pathways can reduce maintenance needs.
Absolutely! Unlike traditional gardens, xeriscaped yards require less mowing, weeding and watering, so you enjoy a stunning landscape with minimal upkeep.
More Customer Reviews!
"I can’t say enough good things about Guaranteed Excellence! They were prompt and fair, while being polite and following through on everything they promised! Our yard has never looked better!"
— Ashley Cox Failinger
"Guaranteed Excellence was an absolute pleasure to work with. They are communicative, prompt, and do truly amazing work. I shared my vision and they brought it to life and filled in many of the details that I was missing. They also were able to help me make decisions that are best for the long term viability of the project. Their price was very competitive and they finished my project very quickly. Best of all, whenever I have had additional questions or issues, they have responded immediately and been out the next day to correct it, free of charge. There is more work to be done at my property, and there is no doubt that I will be working with guaranteed excellence to do it."
— Mike Wellner
"We had an extremely positive experience with our landscaping through Guaranteed Excellence. Gary, Jerome and Rafael were a dream team; professional, pleasant, visionary, collaborative, easy to communicate with and of course they did an amazing, beautiful job. I really could not be any happier with how everything turned out and how quickly their crew completed the work. They even kindly moved some very aged rose bushes and peonies that my mom had grown and incorporated them into the design."
— Kerry Roesch
"There are simply to words to let you know how happy we are with the work from Jerome and his team. From his plans to his professionalism to his passion for what he does, there was no detail left unturned. Beyond the beautiful landscaping we come home to everyday, the care and attention that Jerome and his team have shown our yard and our family is a rarity. Jerome and his team are a true gem and our yard is now something we absolutely love coming home to - every day a different flower in a different color pops up and surprises us!"
— Rikki Mor
"Looking for a great landscape company? Guaranteed Excellence did an amazing project at our home last month. They redesigned our patio with an all new larger, more modern paver version. They also installed a new retaining wall and paver pathway, removed old shrub plantings and planted all new shrubs, perennials and trimmed our trees. The whole staff was professional and courteous and a pleasure to work with, even making changes to be in compliance with our local HOA. All the work from the planning stage and implementation was done in a most efficient manner. Our entire yard was redone in just 1 week. We are so pleased with the results of this project and are enjoying our new yard so much. A big thank you to Gary, Jerome, Marco and the whole team!"
— Karla and Danny Ferguson
We Deliver Happiness!
We’re a team of dedicated landscape craftsmen, committed to delivering happiness and fulfillment through beautifully crafted outdoor spaces.
- We Design with Purpose, Build with Precision
- Your Vision, Brought to Life Beautifully
- Timeless Landscapes, Backed by Experience
Ready to Get Started?
For a FREE estimate and consultation, call Rafael and his team today at (303) 922-7199.