Site Planning and Feasibility Checklist for Colorado Land Buyers
A step-by-step guide from Positive Design Build — helping land buyers in Pagosa Springs, Durango, and Southwest Colorado evaluate lots before they close.
Is Your Lot Buildable? The Site Feasibility Study
A site feasibility study is the single most important step before purchasing land in Southwest Colorado. It evaluates whether your lot can support the home you want to build — and what it will actually cost to get there. Skip this step, and you're gambling with tens of thousands of dollars.
What a Feasibility Study Covers
A site planning and feasibility study examines three categories: physical conditions, legal constraints, and infrastructure access. Physical conditions include topography, soil composition, rock depth, drainage patterns, and vegetation. Legal constraints cover zoning, setback requirements, easements, and HOA covenants. Infrastructure access evaluates the distance to electric, water, gas, and sewer — or the viability of well and septic alternatives. In Archuleta and La Plata Counties, we also check wildfire mitigation requirements and snow removal access, which can affect where and how you build on a mountain lot.
The Hidden Costs of Mountain Lots
That beautiful lot overlooking the San Juans may come with hidden costs that don't show up on the listing. Rocky lots in the Pagosa Springs area often require blasting or mechanical rock removal — $10,000 to $50,000 depending on volume. Steep lots need retaining walls that can run $200 to $400 per linear foot for engineered walls. Poor drainage requires French drains, swales, or regrading before construction can begin. We've walked lots where the site preparation costs exceeded the land purchase price. A proper site feasibility study cost of $1,500 to $5,000 is a small price to uncover these issues before you own the problem.
Evaluating Access and Driveway Grades
Access is about more than getting your truck to the building site. Archuleta and La Plata Counties require emergency vehicle access to every residence — that means a driveway wide enough for a fire truck and a turnaround area at the house. Driveway grades above 10% require special surfacing; above 14%, most fire departments won't approve without engineered switchbacks or heated elements. In winter, steep driveways become impassable without plowing infrastructure or radiant heat systems. We evaluate access as part of every land survey for building, because a lot without viable driveway access isn't buildable — no matter how stunning the view.
Pre-Purchase Site Walks with Positive Design Build
Before you close on a lot, walk it with a builder — not just a realtor. At Positive Design Build, we offer complimentary pre-purchase site walks throughout Pagosa Springs, Durango, Bayfield, and surrounding communities. During the walk, we assess slope, drainage, sun exposure, utility proximity, access viability, and potential building envelopes. We'll give you an honest assessment of what it will cost to develop the site and whether the lot supports the home you have in mind. We've talked buyers out of lots that looked perfect on paper but would have cost twice the expected budget to develop. That honesty saves our clients real money.
Thinking About Buying Land in Southwest Colorado?
Walk the lot with a builder before you close. We'll evaluate slope, access, utilities, and buildability — so you buy with confidence, not assumptions.
Utility Hookup Costs and Infrastructure in SW Colorado
Utility hookup costs in Colorado mountain communities are one of the biggest variables in any land-buying decision. A lot that looks affordable can become a budget problem once you factor in power, water, sewer, and communications infrastructure.
Bringing Power, Water, and Gas to Your Site
LPEA (La Plata Electric Association) charges $15 to $25 per foot for electric line extensions, with costs escalating for underground runs or heavily wooded routes requiring tree clearing. If your lot is more than 500 feet from the nearest transformer, budget $10,000 to $20,000 for power alone. Water access depends entirely on location — lots within a PAWSD or other district boundary have tap fees of $8,000 to $15,000, while rural lots require private wells at $15,000 to $30,000 with no yield guarantee until the driller hits water. Black Hills Energy gas extensions follow similar per-foot pricing. Propane is an alternative, but requires tank installation and ongoing fuel delivery costs. Get written estimates from each utility provider before you buy.
Well vs. Cistern: Water Options in Rural Counties
In rural Archuleta and La Plata Counties, your water options typically come down to well or cistern. A permitted well provides long-term water independence but carries upfront risk — drilling can cost $15,000 to $30,000, and some areas have inconsistent water tables. Before drilling, check the Colorado Division of Water Resources well permit database for neighboring wells and their reported yields. Cistern systems — which store trucked-in water — cost $8,000 to $15,000 to install but carry ongoing delivery costs of $150 to $300 per load. For a family home, plan on 2 to 4 deliveries per month. Some homeowners install both: a well for primary supply and a cistern for backup during low-yield months. Your choice directly affects your site planning and feasibility calculations.
Septic System Engineering and Soil Percolation
Nearly every rural lot in Southwest Colorado requires an On-site Wastewater Treatment System (OWTS) — commonly called a septic system. The process starts with a soil percolation test, where a licensed engineer evaluates how quickly water drains through the soil on your lot. This determines the type and size of system you need. A standard gravity-fed septic with leach field runs $15,000 to $25,000. Engineered systems for tight or sandy soils — pressure-dosed or sand-lined — cost $25,000 to $50,000. In Archuleta County, the OWTS permit is required before your building permit can be issued. A failed perc test doesn't always mean unbuildable, but it does mean significantly higher costs for an engineered alternative.
Broadband and Solar Orientation
Modern mountain living requires connectivity. Fiber and cable are limited to town cores in Pagosa Springs and Durango — most rural lots rely on fixed wireless, satellite (Starlink), or cellular hotspots. Check coverage maps before you buy, because a lot in a valley floor or behind a ridge may have no viable broadband option. Solar orientation matters too — south-facing lots at our elevation receive substantially more passive solar gain in winter, reducing heating costs by 15 to 25%. We evaluate solar exposure during every site walk, because proper home orientation relative to the sun affects energy efficiency, snow melt patterns on driveways, and livability through our long mountain winters. These aren't afterthoughts — they're core to responsible site planning.
The Complete Buying Land to Build a House Checklist
Use this checklist before making an offer on any lot in Pagosa Springs, Durango, Bayfield, or rural Archuleta and La Plata Counties. Each item can impact your budget by thousands — or make a lot unbuildable entirely.
Site & Topography
- ☐ Slope percentage measured
- ☐ Rock depth evaluated
- ☐ Drainage patterns mapped
- ☐ Buildable envelope identified
- ☐ Wildfire mitigation zone checked
Legal & Zoning
- ☐ Zoning designation confirmed
- ☐ Setback requirements verified
- ☐ Easements identified via title
- ☐ HOA/covenant restrictions reviewed
- ☐ Boundary survey completed
Water & Sewer
- ☐ Water source determined (well/tap/cistern)
- ☐ Well permit feasibility checked
- ☐ Perc test completed
- ☐ OWTS type and cost estimated
- ☐ Water rights verified
Utilities
- ☐ Electric line distance measured
- ☐ Gas availability confirmed
- ☐ Broadband options verified
- ☐ Total hookup costs estimated
- ☐ Solar orientation assessed
Access & Safety
- ☐ Driveway grade calculated
- ☐ Emergency vehicle access confirmed
- ☐ Winter access plan evaluated
- ☐ Road maintenance responsibility identified
- ☐ Construction vehicle access verified
Budget Impact
- ☐ Site prep cost estimate obtained
- ☐ Utility hookup total calculated
- ☐ Foundation type and cost determined
- ☐ Retaining wall needs assessed
- ☐ Contingency budget set (15-20%)
For county-specific permit requirements, see our guides on Archuleta County building permits and La Plata County building regulations. If your lot has significant slope, read our guide to building on sloped lots for additional engineering considerations.
What Land Buyers Say About Working with Positive Design Build
Clients across Pagosa Springs, Durango, and Archuleta County share their experience with our pre-purchase site evaluations and feasibility process.
"Louis Garday, Sr Pagosa Springs, CO 81147 Re: Positive Design - Mark Positiviata December 23, 2025 What I immediately learned when we first started renovating my 4,000 sf log home was that above and beyond everything else, MARK IS A CRAFTSMAN AND PROFESSIONAL in the truest meaning of those words. His work for the planned 10 months was all completed in several diverse areas, on time, on budget, adding a professional flair whenever possible, such that I can easily claim that his skill and craftsman like work on every aspect of the engagement, including concrete and tile work, fine detailed carpentry, building a new 30’ by 20’ TREX deck, electrical work, safety grab bars and plumbing, repairs of metal roof, painting and drywall, landscaping, and a complete home Code evaluation and corrective action. His professional work easily yielded an increase of my home's value at double what I spent on the project. That ROI clearly will show up if/when I sell the house in 2026 or beyond. In a highly confident and in an unqualified manner I strongly recommend Positive Design and Mark to anyone needing all manner of home construction from a true professional and frankly a nice guy. Louis J Garday Sr. More Background information: Sometimes you get lucky. I was introduced to Mark at a dinner in late 2024 and the conversation turned to the details of the multi-faceted work I needed need to renovate and upgrade my 4,000 sf home on ten acres preparatory to selling it in the Spring of 2026 (my best estimate at the time for the optimum timing to sell based on the political/economic chaos brought on by Fed, the then current administration and pending tax law changes during the four years ending in January 2025). I have a lifetime and some 50 years' experience in the construction and real property development businesses, know the trades and have built or developed multiple commercial properties and was impressed with his knowledge during our dinner. The following Monday I received a call from Mark asking if he could walk my property with me and organize my thoughts on what I characterized as extensive work. What followed was a long and detailed survey he compiled of what was needed to remodel and reposition a 30-year-old valuable and custom log home and natural 10-acre landscape of some 200 Ponderosa Pine Trees, surrounded by the San Juan National Forest. Mark made extensive notes and revisited me a few days later, with a detailed proposal, cost estimates, a few new ideas to maximize what I had in place, a time and materials schedule, work timing and scheduling (what us old time real estate guys call a PERT Chart). This being a new relationship and having just met Mark, I agreed to bite off the first phase immediately and Mark began the (bring it up to Code phase) the following Monday in December 2024. Work began immediately and he moved his equipment into my carport and began working. I need not have worried about Mark and the process. He did a great job from Day through the completion. Louis J Garday Sr. Pagosa Springs, CO 81147"
Louis
2025-12-23
"Mark remolded our home when we bought it to perfection!!! He built a corner fireplace; a new kitchen with built in cabinet with glass doors and lights for displays. We have the most amazing master bath as he built a round shower stall, walkin with 5 shower heads, a seat and all done in glass bricks. The window is all glass bricks to let the light in with an open small window at the top to let steam out and fresh air in if wanted. A beautiful tile inlaid floor rhat is heated as wanted that he designed. Many people have come to look at it and he built several more!! He comes to fix anything or make something better when ever he is needed. He builds remarkable original things which he designs to fit the space and to last for ever! He is an artist and a very talented guy!!! I would not have anyone else do the kind of work Mark does!! Leslie Hawkinson"
Leslie
2025-12-12
"Mark of Positive Design Build did a total remodel on a rental property I own. The property was rented for over 13 yrs to the former tenant and it was sorely in need of repairs & overall updating. He did a fabulous job & it looked like a new home!! All new kitchen, new wiring, a lot of new plumbing, new bathroom tub surround, new vanity & lighting , all new paint, floors refinished & new door locks & some new doors for closets & exterior doors. I was very pleased with his hard work & the finished project."
Kelly
2025-12-16
"Mark did a great job!!! He brought creativity and imagination to a job , where I did not see the possibilities. His experience added great skill and forethought in to designing my mudroom and bathroom. I highly recommend Mark Posiviata for whatever you need to do...."
Bill
2025-12-28
"4.5 stars - Mark Posiviata at Positive Design Build LLC did a beautiful job designing and building my laundry/mudroom. The cabinets, bench, and countertop are absolutely stunning, and the craftsmanship is truly top-notch. The quality of work and attention to detail really show — the space is both functional and gorgeous. Design-wise, Mark was excellent to work with. He listened carefully, offered great ideas/suggestions, and delivered a final result that exceeded my expectations. I’m thrilled with how the room turned out and receive compliments on it all the time. The only area for slight improvement would be communication and coordination with contractors during the process, which could have been smoother at times. That said, the end result was well worth it. I would absolutely recommend Mark and Positive Design Build LLC for anyone looking for high-quality custom work and thoughtful design."
Jules
2025-12-05
We Evaluate Lots Across Southwest ColoradoPagosa Springs
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Saturday: 9am - 5pm
Sunday: Closed
Common Questions About Site Feasibility and Buying Land in Colorado
Answers from our team at Positive Design Build — based on years of evaluating mountain lots across Archuleta and La Plata Counties.
How much does a site feasibility study cost?
A professional site feasibility study in Southwest Colorado typically costs between $1,500 and $5,000, depending on the complexity of the lot. That includes topography review, utility availability assessment, soil analysis, zoning and setback verification, and access evaluation. For mountain properties in Pagosa Springs and Durango, costs tend toward the higher end because steep terrain and remote locations require more detailed engineering. The investment is well worth it — we've seen buyers avoid $50,000 to $100,000 in unexpected site costs by discovering issues before closing. Think of it as insurance against buying land you can't build on.
What should I look for when buying land to build a house in Colorado?
Start with water. In rural Archuleta and La Plata Counties, municipal water isn't always available — you may need a well permit, and there's no guarantee of adequate yield until you drill. Check soil stability and rock depth, because shallow bedrock means expensive excavation or blasting for foundations and septic systems. Evaluate solar gain and prevailing wind exposure — south-facing lots reduce heating costs significantly at our elevation. Review any HOA covenants or architectural guidelines that restrict what you can build. And always verify road access, especially in winter. Some lots look great in July but are inaccessible in January without major driveway improvements.
How do I determine the boundaries of my lot?
You need a professional land survey for building on any lot in Colorado. An Improvement Location Certificate (ILC) shows existing structures relative to property lines and is required by most title companies. For new construction, you'll want a full boundary survey that locates corner pins and monuments — the metal markers set by the original surveyor. A topographic survey adds elevation contours, which are essential for site planning and feasibility on mountain lots. In Archuleta County, we've encountered plenty of lots where the assumed boundaries were off by 10 or more feet, which can make the difference between a buildable setback and a permit denial.
What are the common utility hookup costs in Pagosa Springs?
In the Pagosa Springs area, LPEA electric line extension runs roughly $15 to $25 per foot from the nearest transformer, with a minimum connection fee. PAWSD water tap fees currently range from $8,000 to $15,000 depending on meter size. If you're outside the water district, a residential well costs $15,000 to $30,000 depending on depth. Septic system installation — required on most rural lots — averages $15,000 to $35,000 for a standard OWTS, more for engineered systems on tight soils. Natural gas from Black Hills Energy has similar per-foot extension charges. Total utility hookup costs in Colorado mountain communities routinely add $40,000 to $80,000 to a project budget.
Can I build on a lot with a 30% grade?
Yes, but expect significantly higher engineering and construction costs. A 30% grade requires engineered retaining walls, specialized foundation systems like stepped or pier foundations, and careful drainage planning. Driveway grades above 10% need special surfacing for winter traction, and most fire departments require turnaround areas that are hard to achieve on steep lots. In our experience building in Durango and Pagosa Springs, lots above 25% grade can add $50,000 to $150,000 in additional site work compared to a relatively flat lot. It's buildable, but a thorough <a href="/guides/building-on-sloped-lots-guide" class="underline font-medium">site feasibility study for sloped lots</a> is essential before you commit.
How do I check for easements on a property?
Start with the title commitment — your title company will identify recorded easements as part of the closing process. But don't stop there. Review the county plat maps at the Archuleta or La Plata County assessor's office, which show platted utility easements and access roads. Contact LPEA, Black Hills Energy, and the local water district to check for utility easements that may not appear on the plat. Prescriptive easements — created by long-term use without formal recording — are harder to find but common in rural Colorado. We've seen properties where a neighbor's driveway or waterline crossed the lot without any recorded easement, creating legal complications during construction.
Does a lot need a 'Perc Test' for a septic system?
If your lot isn't connected to a municipal sewer system — which describes most rural lots in Archuleta and La Plata Counties — you'll need a soil percolation test before the county will issue an OWTS (On-site Wastewater Treatment System) permit. The perc test measures how fast water drains through the soil, which determines what type of septic system is allowed and how large the leach field must be. If the soil percs too fast (sandy gravel) or too slow (clay), you may need an engineered system that costs $25,000 to $50,000 more than a conventional system. The perc test results also limit the number of bedrooms you can build, since bedroom count determines wastewater capacity.
Is it cheaper to buy land with utilities already at the curb?
Almost always, yes. Lots with utilities at the curb — electric, water, and sewer or approved septic — carry a higher purchase price, often $15,000 to $40,000 more than comparable raw lots. But the savings on infrastructure are substantial. Running power a quarter mile to a remote lot can cost $25,000 or more. Drilling a well is $15,000 to $30,000 with no guaranteed yield. Installing a septic system adds another $15,000 to $35,000. When you add up the real utility hookup costs in Colorado mountain communities, a 'cheaper' raw lot frequently ends up costing more than a lot with services in place — plus you can start construction months sooner, avoiding a full season of site prep.
Still have questions?
We're here to help you find the answers.
Don't Buy Land Without Walking It With a Builder
Schedule a free site walk with Positive Design Build. We'll evaluate your lot's slope, access, utilities, and buildability — and give you an honest assessment before you close.