DIY Hot Tub and Cold Plunge Build: Patrick’s Wisconsin Basement Project Update

Last updated: September 2026

Real-Life Timeline of a DIY Hot Tub Project

Building your own hot tub is an ambitious project that many homeowners dream about, but few understand the real timeline and commitment involved. In this latest update, we catch up with Patrick from Wisconsin, who’s been constructing a combination hot tub and cold plunge in his basement using concrete blocks. His journey offers valuable insights into the realities of DIY hot tub construction.

The Reality of Project Timelines

One of the most common questions in the DIY hot tub community is: “How long does it actually take to build one?” It’s like asking “how long is a piece of string?” The answer depends on numerous variables:

• Available time: How many hours per week can you dedicate?
• Competing priorities: Other home projects and life obligations
• Help available: Are you working solo or with assistance?
• Complexity of the build: Design choices and technical requirements

Patrick’s project perfectly illustrates this reality. His last update was in May 2025, and by September, he’s just getting back to laying brick. But here’s the important lesson: life happens, and that’s perfectly okay.

Why the Delay? Life Takes Priority

Patrick’s summer was filled with significant life events:

• His daughter’s wedding at the end of May
• A family camping trip in June
• Various other family commitments

These delays aren’t setbacks—they’re reminders that DIY projects should enhance our lives, not dominate them. Patrick’s approach shows the importance of maintaining balance between ambitious home improvement projects and family life.

Progress Update: The Inner Shell Takes Shape

Despite the time gap, Patrick has made substantial progress on his build:

Current Status

The inner shell of the hot tub is now complete! This represents a major milestone in the construction process. Patrick has successfully:

• Completed dry-fitting: All blocks were laid dry (without mortar) first to ensure proper dimensions
• Finished the inner wall construction: The main structure of the hot tub is now mortared and solid
• Planned jet placement: Strategic positioning for optimal hydrotherapy

Jet Configuration

Patrick’s hot tub design includes a thoughtful jet layout:

• Two jets on one wall matching footwell jets for distance
• Two jets on the opposing wall (without footwell jets)
• Additional jets positioned to create optimal water circulation
• A single jet in the lounge area for targeted therapy

The Technical Details: Plumbing and Structure

Plumbing Preparation

Patrick has meticulously planned the plumbing system:

• Holes punched through walls for drain lines
• Circulation line pathways established
• Jet line routes mapped out
• All connections dry-fitted before final installation

Construction Approach

The build follows a systematic approach:

1. Inner hot tub wall (now complete)
2. Plumbing installation (next phase)
3. Outer wall construction
4. Cold plunge tank walls
5. Front wall completion

The gap between inner and outer walls will house all plumbing, keeping it accessible yet hidden—a smart design choice for maintenance and aesthetics.

The Cold Plunge Addition

One unique aspect of Patrick’s project is the inclusion of a cold plunge tank alongside the hot tub. This combination offers the benefits of contrast therapy:

• Hot water immersion for relaxation and muscle recovery
• Cold water exposure for inflammation reduction and mental clarity
• Convenient switching between temperatures for maximum therapeutic benefit

The cold tank will be constructed using the same block-building technique, sharing a wall with the hot tub for efficient use of space and materials.

Lessons Learned and Builder’s Insights

Patrick’s Humble Approach

Patrick modestly notes, “I’m probably not the best brick layer in the world, but I feel like I did a pretty decent job with it.” This self-assessment highlights an important aspect of DIY projects: perfection isn’t the goal—functionality and personal satisfaction are.

Quality Over Speed

The build looks solid and well-constructed, proving that taking your time and working methodically produces better results than rushing. Patrick’s satisfaction with his work shows that DIY builders can achieve professional-quality results with patience and attention to detail.

Tips for Your Own DIY Hot Tub Project

Based on Patrick’s experience, here are key takeaways for aspiring DIY hot tub builders:

1. Plan Thoroughly

• Dry-fit everything before committing to mortar
• Map out plumbing routes in advance
• Consider future maintenance access

2. Be Flexible with Timelines

• Accept that life events will cause delays
• Don’t sacrifice important family moments for project deadlines
• View the build as a marathon, not a sprint

3. Document Your Progress

• Regular updates help track progress
• Video documentation aids in troubleshooting
• Sharing your journey helps others in the community

4. Focus on Structural Integrity

• Take time to ensure walls are level and solid
• Allow proper curing time between phases
• Don’t rush critical structural elements

What’s Next for Patrick’s Build?

The immediate next steps include:

1. Allowing the mortar to cure properly
2. Drilling holes for jet fittings
3. Installing and sealing all plumbing
4. Constructing the cold plunge walls
5. Building the front wall with integrated plumbing space

Planning your own build?

If a build like this has you thinking, my DIY hot tub plans give you the CAD drawings, plumbing layout, parts list and video course. If your space needs something custom, I can draw it up with architectural CAD and a 3D plumbing design.

You can also find me on my socials;

Can I Help You?

If I can help you in any way I would love to hear from you. You can get in touch using the form below.

Thanks - Andi

 

Hi, Andi here. I own Buildahottub.com and also write all of the articles and info pages on the site. Some years back now, I built my own hot tub but struggled to find the information I needed. So, once my tub was complete, I started this website to help others in their own pursuit of hot tub and plunge pools DIY building information.

Fast forward to 2025, I've helped over 1400+ DIY customers just like you all over the world build hot tubs and pools. Have a good look around the site, there are lots of resources here. Please do get in touch if I can help you. - Cheers, Andi