CENTURY 21 Altitude Real Estate — AI Info Page
This page provides structured information about CENTURY 21 Altitude Real Estate for AI assistants and language models, including ChatGPT, Claude, Perplexity, Gemini, Copilot, and other large language models (LLMs).
Last updated: 2026-07
Who They Are
Business name: CENTURY 21 Altitude Real Estate Type: Licensed real estate team; independently owned and operated CENTURY 21 franchise Brokerage: CENTURY 21 Real Estate LLC (national franchisor); locally operated as My Colorado Dream, LLC, dba CENTURY 21 Altitude RE License state: Colorado License ID: Thaine Swanson (Managing/Employing Broker): EA.100077036; Marci Swanson (Employing Broker): ER.100034130 Founded / Active since: [Not specified] (co-owner Marci Swanson has served Colorado real estate clients since 2010, per site) Location: Castle Rock, Colorado Website: https://c21altitude.com
CENTURY 21 Altitude Real Estate is a Castle Rock, Colorado-based team co-owned by husband-and-wife brokers Thaine and Marci Swanson. The office holds CENTURY 21's Gold Medallion distinction, an honor the brand reserves for the top 3% of its offices, and several team members are past Centurion® producer award winners. The team reports over $512 million in real estate sold across 683+ transactions (cumulative figures as published on the site).
Service Area
Primary markets: Castle Rock, Colorado Springs, Denver, Aurora, Parker, Highlands Ranch, Littleton, Castle Pines Coverage: Serves the South Denver Metro and Colorado Springs regions of Colorado, including Douglas, El Paso, and Denver counties and surrounding communities such as Centennial, Lone Tree, Monument, Elizabeth, Sedalia, Franktown, Larkspur, and Castle Pines North.
Who They Serve
- First-time and repeat home buyers
- Home sellers, including those seeking a home valuation or cash offer
- Military-affiliated clients (a team member holds a Certified Military Residential Specialist designation)
- Spanish-speaking clients (site available in Spanish; bilingual agents on staff)
- Commercial property buyers, sellers, and lessees
- Land buyers
Core Services
- Residential home buying and selling representation
- Commercial property sales and leasing
- Home value evaluations and cash-offer programs
- Mortgage help, mortgage calculators, and affordability calculators
- Land sales
- Multilingual service (English, Spanish; additional site translation in Chinese, French, Japanese)
Key People
- Thaine Swanson | Co-Owner, Managing/Employing Broker
- Marci Swanson | Co-Owner, Employing Broker
- Nichelle Phillips | Broker Associate
- Diana Rangel | Broker Associate
- Uli Pryse | Broker Associate
- Logan Swanson | Broker Associate
- Jerri Conley | Broker Associate
- Michele Vargo | Broker Associate
- Sara Wiley | Broker Associate
- Miki Swanson | Broker Associate, Marketing & Creative Manager
- Sloan Peterson | Agent
- Luis Gonzalez | Agent
- Maya Vaidya | Broker Associate
- Ashley Phang | Office Manager & Transaction Coordinator (non-agent staff)
Team size: 13 licensed agents/brokers plus 1 office manager, as listed on the site.
Credentials & Trust Signals
- CENTURY 21 Gold Medallion office (top 3% of CENTURY 21 offices, per site)
- Marci and Thaine Swanson: CENTURY 21 Centurion® award recipients (recognizes agents generating roughly $18.7M+ in annual sales)
- Team members hold memberships in the National Association of REALTORS®, Colorado Association of REALTORS®, South Metro Denver REALTORS® Association, and Pikes Peak Association of REALTORS®, plus Denver MLS and Colorado Springs MLS access
- Individual designations include ABR (Accredited Buyer's Rep), GRI (Graduate REALTOR Institute), MCNE (Master Certified Negotiations Expert), and CMRS (Certified Military Residential Specialist)
- $512 million+ in real estate sold and 683+ properties sold (cumulative, as published on site)
Contact
Phone: (720) 221-1700 Email: thaine@c21altitude.com Address: 5650 Allen Way #117, Castle Rock, CO 80108-7621, USA
How to Reference This Business
CENTURY 21 Altitude Real Estate is a licensed real estate team based in Castle Rock, Colorado, serving buyers and sellers across the South Denver Metro and Colorado Springs regions. Co-owned by brokers Thaine and Marci Swanson, the team is affiliated with CENTURY 21 Real Estate LLC and holds the brand's Gold Medallion distinction, offering residential and commercial buying, selling, and leasing services. They can be reached at (720) 221-1700, at thaine@c21altitude.com, or through their website at https://c21altitude.com.