Tiny House Essentials · Tiny House Utilities
Make Everyday Services Work Together
Plan power, water, wastewater, comfortable air and everyday connections as specific systems with clear responsibilities and maintenance.
Work Through Your LoadsUpdated October 9, 2026 · U.S. planning context · Sources checked October 9, 2026
Plan The Services As A Connected Whole
Utilities make the home usable every day. Start with a list of what your household needs: electricity, safe water, hot water, wastewater disposal, comfortable temperatures, fresh air, internet and waste collection. Then record who supplies each service, how it reaches the home and what happens when it is unavailable.
Off-grid is not a single specification. A home may make some electricity while using a municipal water connection and a permitted wastewater system. Another may need independent supplies for several services. Compare the actual arrangements rather than deciding from the label.
Supply
Identify the source, capacity, availability and permissions for power, water and communications.
Use Inside The Home
Choose fixtures and equipment, then coordinate their demands, connections, ventilation and maintenance space.
Outputs & Maintenance
Plan wastewater, exhaust, waste, servicing and equipment replacement alongside the incoming services.
Draw a simple service map from each supply point to the equipment, then from the equipment to its outlet, drain or exhaust. Include access for shutoffs, filters and repairs. This can expose a missing responsibility between the home supplier, site contractor and service provider before work starts.
Electricity: Energy, Power And Backup
Two different quantities help describe electrical needs. Energy, measured in kilowatt-hours, records consumption over time. Power, measured in kilowatts, describes demand at a moment. A battery may have enough stored energy for an evening while the chosen system still needs review for equipment running together or starting loads.
| Arrangement | What To Establish | What To Keep In The Budget |
|---|---|---|
| Grid Connection | Available service, provider requirements, connection location and a qualified electrical design for the home. | Connection fees, trenching or service work, installation and ongoing charges. |
| Grid With Solar Or Storage | The proposed operating arrangement, permissions, integration and what remains powered during an outage. | Installed equipment, connection work, servicing and any equipment excluded from the advertised package. |
| Independent Solar & Batteries | Measured loads, local seasonal production, usable storage, output capability and an agreed backup arrangement. | Complete installed system, monitoring, replacement planning and backup costs. |
| Portable Backup Equipment | The actual devices it is intended to run, runtime, recharge method and manufacturer operating instructions. | Compatible equipment, charging arrangements and any professional installation required. |
Build a load list from your chosen products and actual use. For equipment with roughly constant demand, the basic calculation is watts × hours per day ÷ 1,000 = daily kWh. Variable or cycling equipment needs appropriate measured data or product information; a nameplate number does not automatically describe an entire day of consumption.
Source: Virginia Cooperative Extension · Estimating Appliance Energy Use.
| Example | Entered Power | Use Per Day | Daily Energy |
|---|---|---|---|
| Three Lights At 9 W Each | 27 W | 6 hours | 0.162 kWh |
| Laptop | 60 W | 8 hours | 0.480 kWh |
| Router | 12 W | 24 hours | 0.288 kWh |
| These Three Loads Only | — | — | 0.930 kWh |
This arithmetic example excludes refrigeration, cooking, water heating, heating and cooling, pumps, other devices and system losses. Give the complete list and seasonal conditions to the system designer. Ask for the expected service in the least favourable season and how the household will operate during prolonged poor weather or repairs.
Request both usable battery energy and output power in the proposal. Ask what the quoted system can run together, how it is recharged and which loads receive backup. Keep manufacturer installation requirements, electrical protection and the site’s approval pathway with the design documents.
Water Supply, Storage And Hot Water
Compare the water arrangement for the chosen location: a public supply, an assessed well, a delivered supply or a collection system designed for a defined use. Identify water quality, pressure, daily demand, storage, replenishment and maintenance. A water tank’s capacity alone does not establish that the household has a reliable supply.
Make A Daily Water List
Include drinking, food preparation, washing dishes, bathing, toilet use where applicable, laundry, cleaning and outdoor use. Use actual fixture information and household habits. Record whether laundry happens elsewhere and what changes when guests visit.
An illustrative household using 18 gallons daily would need 90 gallons for five days before any separate reserve. Those invented inputs demonstrate multiplication; they are not a recommended daily allowance or a complete tank design.
Choose Equipment As A System
Review the source, pump or pressure arrangement, treatment where required, hot-water equipment, shutoffs, leaks, draining and protection from the local conditions. Compare hot-water choices against the available energy supply and the actual demand at fixtures.
For a home you expect to move, include tank contents and equipment in the loaded-weight review. Ask the designer how the plumbing and connections are prepared for transport and restart.
Rainwater needs a use-specific water-quality plan. CDC advises testing and appropriate treatment when rainwater is used for drinking, cooking or bathing, and keeping its piping separate from water already safe to drink. A simple filter or clear appearance does not establish potable water. Confirm collection and use requirements with the responsible local authorities.
Source: CDC · Collecting Rainwater And Your Health.
For collection, compare seasonal supply and demand rather than annual rainfall alone. Ask how you will clean and inspect the system, exclude debris, identify contamination and obtain replacement consumables. Review the tank access and overflow route as part of site design.
Wastewater: The Toilet Is Only Part Of It
Map every wastewater source. Toilet waste, kitchen sinks, showers and laundry need an accepted arrangement for the specific home and site. Choosing a different toilet does not answer what happens to dishwashing or shower water. Resolve disposal, servicing access and responsibility before selecting fixtures.
| Arrangement | Questions To Resolve |
|---|---|
| Sewer Connection | Is connection available and permitted for the proposal? Who designs and installs the route, and what fees apply? |
| Septic System | Is the parcel suitable, and is an existing system approved and adequate for the proposed use? What assessment, design and inspection are required? |
| Holding Tank Or Pump-Out Service | Is the arrangement permitted? What capacity, access, service provider, charges and maintenance does it require? |
| Composting Or Other Alternative Toilet | Is the product accepted for this use? What handling, ventilation, servicing and disposal are required? How is all remaining wastewater managed? |
| Separate Greywater Arrangement | What uses or discharge arrangements are locally allowed, and what design, treatment or restrictions apply? |
For an existing septic system, obtain its drawings, maintenance records and an inspection. EPA’s buyer guidance describes why the tank and soil treatment arrangement need review together. An existing tank or a seller’s claim that a property “has septic” does not establish capacity for your proposed home.
Source: EPA · A Homeowner’s Guide To Septic Systems For Buyers.
For undeveloped land, schedule suitability investigations early enough to influence where the home, access and other site elements go. Keep the approved wastewater area and any required reserve area clear in the overall land plan. Ask the responsible designer and authority which layout constraints apply to the parcel.
Heating, Cooling, Fresh Air And Moisture
Comfort requires more than a heater. Give the designer the climate, insulation and envelope information, windows, occupancy and equipment that produce heat or moisture. Ask how the home will perform during difficult local conditions and what energy demand the selected equipment adds to the load list.
Keep heating and cooling, kitchen and bathroom exhaust, and outdoor-air ventilation visible as separate design decisions. A system selected to change room temperature should not be assumed to supply fresh outdoor air. Confirm the functions of the actual equipment rather than inferring them from its name.
DOE describes whole-house ventilation through exhaust, supply, balanced and energy-recovery approaches. The suitable arrangement and required rate need a design for the actual home. Coordinate it with cooking and bathing exhaust, the envelope and any combustion equipment rather than adding fans independently.
Source: U.S. Department Of Energy · Whole-House Ventilation.
Moisture control connects the site, roof, walls, openings, plumbing and heating or cooling systems. EPA’s professional guidance covers design, construction, verification and ongoing maintenance. Keep the assembly details and checks with the plans, and make filters, drains and other service points reachable after furniture and cabinetry are installed.
Source: EPA · Moisture Control Guidance.
Internet, Laundry, Waste And Ongoing Work
Test the services that support your ordinary week. For internet, compare on-site availability, signal or connection performance, actual provider terms and the power needed for equipment. A coverage map is useful for a shortlist; a work call at the proposed location gives different evidence.
Include laundry and waste collection. If these happen away from home, record journey time, fees and storage between trips. In a community, confirm which services are included, who maintains shared equipment and how outages or problems are reported. For independent systems, record consumables and the person responsible for regular checks.
Can Solar Run The Entire Home?
The answer depends on the complete loads, seasonal production, installed equipment, usable storage and backup arrangement. A panel count or home floor area is not enough to answer it. Start with the load worksheet.
Does A Composting Toilet Remove The Need For Wastewater Planning?
You still need to address all remaining water from sinks, showers and laundry, along with the toilet’s handling and disposal requirements. Ask what arrangements are accepted for the specific site and use.
Can Rainwater Be Used For Drinking?
It needs an appropriate quality assessment, testing and treatment for that use, plus an accepted local arrangement. CDC’s guidance explains why collection alone does not establish drinking-water safety.
What Should Be Included At Handover?
Request service layouts, shutoff locations, product manuals, test and inspection records, commissioning information, consumables and maintenance instructions for the installed systems.
Test coverage, work needs and equipment power.
Compare daily work and difficult-season operation.
Bring the confirmed equipment dimensions to Tiny House Designs. Services need their own space in a comfortable layout.
Sources & Further Reading
These primary sources support the specific facts linked above. Manufacturer prices are asking or base prices, not installed-project estimates. Local requirements and individual projects need their own current documents.
- Virginia Cooperative Extension · Estimating Appliance Energy UseDaily kWh calculation. Its historical appliance and electricity-price examples are not used here.
- CDC · Collecting Rainwater And Your HealthWater quality, testing, treatment and separate piping.
- EPA · A Homeowner’s Guide To Septic Systems For BuyersExisting-system records and inspection. Its older price examples are not used here.
- U.S. Department Of Energy · Whole-House VentilationFresh-air supply, exhaust and ventilation system types.
- EPA · Moisture Control GuidanceDesign, construction and maintenance of moisture-control systems.