Ward County, North Dakota

The Last Airstream
You'll Ever Need

This polished 31-foot Sovereign was stripped to the frame and rebuilt as a full-time home. It has since traveled approximately 21,300 miles. The build includes a 48-volt Victron power system, 1,000 watts of solar, and roughly 15kWh of lithium storage. It also has residential water and climate systems, oak-and-birch cabinetry, walnut countertops, and tongue-and-groove cedar walls.

Appraised Value $109,500 USPAP Fair Market Value by Polk Associates, March 2026. Offers accepted; open to trade discussions for the right 25–27' Airstream hatch model.
Year 1979
Model Sovereign Custom
Length 31 feet
Serial I31A9J1620
Explore

Rebuilt from the
Ground Up

For 63 days, this Airstream's body sat completely separated from its frame. Not patched. Not freshened. Rebuilt the way you'd restore something worth restoring.

The rear six feet of frame were cut away and replaced with new steel. Nearly every outrigger was replaced and welded. The factory joints, many of which had never been welded, were all welded. POR-15 rust preventative was applied throughout. Uprated 3,500-pound Colin Hyde units replaced the original 3,200-pound axles. They sit at a 32-degree down angle. Measured dry weight is 5,755 pounds after water-weight adjustment.

Then every system, including electrical, plumbing, climate, and interior, was rebuilt from scratch. Not upgraded. Built new, on a foundation that will outlast most anything on the road today.

63
Days Body-Off Frame
6'
Rear Frame Replaced
21,300
Towing Miles
1/1
Outstanding in All Categories
15kWh
Battery Capacity
1,000W
Solar Array

Independently Verified.
Outstanding.

In March 2026, James A. Polk, PE, ASA, a licensed professional engineer and accredited senior appraiser with Polk Associates, LLC, completed a USPAP-compliant market appraisal using the comparative approach. The finding: Fair Market Value of $109,500, with an estimated market time of 2–4 months.

📄 View Full Appraisal Report (PDF)

Appraiser
James A. Polk, PE, ASA
Firm
Polk Associates, LLC
Date
March 12, 2026
Method
Market (Comparative)
Standard
USPAP Compliant
Purpose
Sale & Insurance
1
Exterior
1
Kitchen
1
Bath
1
Bedroom

A score of 1/1 across all four categories is the highest possible rating. The exterior shows polished bare aluminum. The clear coat was removed and the surface brought back to its original mirror finish. Inside, every category rated the same. This is not restoration to "good condition." It is outstanding.

Every System.
Built New.

The electrical system was completely rewired from scratch around a 48V primary architecture designed for long off-grid capability, not weekend camping.

Battery Bank
Two 51.2V rack batteries plus four 12.8V 100Ah batteries form the battery bank. The four smaller batteries make one 51.2V 100Ah series string. All three 51.2V banks run in parallel for approximately 51.2V 300Ah and 15kWh nominal capacity.
Solar Array
10× 100W ECO-WORTHY monocrystalline panels = 1,000W total
Victron MultiPlus-II
3000VA 48V Inverter/Charger
Victron SmartSolar MPPT 150/35
Charge controller for the solar array
Victron Cerbo GX + Touch 50
Full monitoring hub with touchscreen display
Victron SmartShunt 500A
Battery monitor with real-time SOC tracking
Victron Lynx Bus Bars
Lynx Power In + Lynx Distributor for clean power distribution
Victron Orion DC-DC
48V to 12V subsystem converter
SmartPlug 30A Shore Power
Shore power inlet when available
LED Lighting Throughout
LED puck lighting throughout the interior
GFCI Protection
GFCI protection on the AC electrical system.

Heating, cooling, and ventilation were each addressed as independent systems built for real-world conditions, not typical RV expectations.

DELLA Mini Split, 12,000 BTU
20 SEER2, WiFi-enabled. Condenser is powder-coated silver to help visually blend with the polished Airstream shell, mounted on custom rear frame extension. Ducted via AC Infinity CloudLine Pro S6 inline fans.
VEVOR 8KW Diesel Heater
Externally vented diesel forced-air heater to minimize cold-weather condensation, integrated into smart home automation.
2× MaxxAir MaxxFan Vents
Smoke top with powered roof ventilation fore and aft
2× Residential Skylights
Double-pane residential skylights add natural light while reducing heat transfer.
Wall & Shell Insulation
Vertical surfaces: two layers of 3/4-inch Pro Select R-Matte Plus-3; curved shell sections: three layers of 1/2-inch Pro Select R-Matte Plus-3.
Bus Kote Roof Coating
Thermal coating measured at a 10°F interior temperature reduction

Completely replumbed in PEX, with water softening, filtration, tankless heating, and Bluetooth monitoring. This is a residential water system in a 31-foot shell.

Full PEX Replumb
All-new PEX plumbing throughout, with zero original lines retained
Schluter KERDI Tile Shower
Waterproofed residential-quality tile shower. The tile has remained intact through approximately 21,300 documented towing miles.
Tank Capacities
50 gal fresh · 25 gal gray · 25 gal black
SeeLevel II 709-BTP3
Bluetooth monitoring for fresh, gray, and black tank levels on your phone
Fogatti FS06B1 Tankless Water Heater
Instant-on propane tankless water heating with no tank to refill and no standby loss
Stainless Kitchen Sink
Standard stainless-steel kitchen sink.
Blu Technology AR3 Elite
A closet-mounted Blu Technology AR3 Elite bundle provides three-stage 0.2-micron water filtration and a 10,000-grain SMART CAP water softener.
Mopeka Propane Sensors
Bluetooth ultrasonic sensors on both 30lb propane tanks with real-time level monitoring
Tank Heaters
Heaters on all tanks with a wall-mounted switch for cold-weather use
Dometic 310 Toilet
Standard Dometic porcelain-feel throne

Tongue-and-groove cedar. Walnut countertops. Oak-and-birch cabinetry. Amber shellac. This interior was built by hand, not sourced from an RV catalog.

Tongue & Groove Cedar Walls
Amber shellac finish throughout the bedroom, bathroom, and kitchen
Aromatic Shiplap Cedar Closet
Built-in dresser integrated into the closet design
Custom Walnut Countertops
Kitchen and bath countertops over custom oak and birch cabinetry
Custom Cabinetry
Four oversized overhead cabinets, all custom-built and not OEM
Custom Queen Bed Platform
North-south orientation with full under-bed storage
Custom U/J-Shaped Dinette
Custom U/J-shaped dinette layout with 5" thick saddle vinyl cushions and cavernous under-seat storage.
Marine Pedestal Table (35×43")
Raises, lowers, twists 360°, slides fore/aft and side-to-side ~6". Drops to create an ~80"×52" bed. National Parks map top.
LVP Flooring Throughout
Luxury vinyl plank over sealed marine plywood subfloor with dual-layer polystyrene insulation beneath
Fully Resealed Windows
Original windows were retained and resealed. New screens. Custom 3D-printed window lift handles.
Appliances
Hotpoint 9.7 cu ft residential refrigerator · Equator 4600 combo washer/dryer · Anhane 2-burner 2300W induction cooktop · Toshiba microwave/convection/air fryer

Home Assistant runs on a dedicated Raspberry Pi, connecting power, climate, tanks, lighting, and security in a single dashboard.

Home Assistant on Dedicated Raspberry Pi
Integrates Victron power, tank sensors, diesel heater, lights, and motion detection.
Tablet Dashboard
Dedicated tablet for the Home Assistant dashboard, included with the sale
Home Assistant Voice
Local voice control with speaker and microphone included
Tapo D225 Video Doorbell
Smart doorbell camera at the entrance
RF-Controlled Lighting
RF remotes throughout, also controlled through Home Assistant
Motion-Activated Kitchen Lighting
Under-cabinet kitchen lighting triggers on motion
Road Connectivity
Starlink Gen3, Peplink B One router, Peplink MAX BR1 Mini, and Pepwave roof antenna.

Everything you need to move in and move out. The following items are included in the sale price.

Karrier 235/75R15 on Aluminum Bullet Hole Wheels
New tires installed May 2024 with TST tire pressure monitoring system
Original Awnings, Retained & Restored
Original awnings on both sides and the rear, all restored and functional
TCL Roku TV (Bedroom)
TV mount in the bedroom and articulating TV mount in the dinette area, both included
Manual OEM-Style Leveling Jacks
Traditional manual jacks in OEM style
All LED Exterior Lighting
Full exterior LED lighting for porch, marker, and running lights
Safety Equipment
Smoke/CO detector and fire extinguisher, installed and current
Road History
Full-time use since June 2024; approximately 21,300 towing miles through May 2026.

Make an Offer

Accepting offers now. No dealers. No middlemen. This is a private sale from the person who built it.
Will consider a trade/partial trade for the right 25–27' Airstream hatch model.
Located in Ward County, North Dakota. Viewings are available by appointment. The trailer remains in active travel, so its location can change at any time; this website updates daily with its current public location.

Email to make an offer or trade proposal
Ward County, North Dakota