Site Measures – Part 2: Documenting Home Systems: Mechanical, Electrical & Plumbing

Close up picture of a furnace in a historic home

Measuring a home is more than sizing and locating walls, windows, and doors. There are many more complex parts of a home that need to be captured in order to set our design team up for success during the design process. With remodeling comes moving openings, walls and fixtures, which inevitably means moving systems. Mechanical, electrical, and plumbing systems are typically hidden within walls and between floors, requiring a bit of know-how and experience to properly document, which is crucial for helping our design team to determine the feasibility and cost implications of our choices.


Mechanical Systems:

Basement utilities are easily accessible or hidden with a gliding door

Furnace: Locating and sizing the volume of the existing furnace is important when the area around the furnace is being remodeled. It is most cost effective to keep the furnace in its existing location and plan the space around it, so knowing exactly where it sits is key. Noting whether a furnace is gas or electric also helps us to communicate to our mechanical subcontractors which type of system they’ll be working with.

Left: Basement Before. Right: After - ducts are painted to match the walls and ceiling in this basement family room

A room with a lot of pipes coming out of the ceiling





Ducting & Registers: For basement remodels it is important to locate, size, and capture headroom below each duct. Often these ducts are installed in a way that doesn’t plan for future conditioned space and, thus, pose obstacles that either need to be planned around or changed. 


Capturing registers and cold air returns on each level of the home helps us trace the ducts back to the furnace, allowing us to determine which walls have ducting running through them. Planning around these duct paths and avoiding relocating them can help to keep construction costs down.

Close up of vintage heating register with unique pattern

Plumbing Systems:

Water Meter: Locating and sizing the water meter, which is typically found at the street, is important since the size of the water line running from the meter to the house determines the number of plumbing fixtures the meter can efficiently supply. Our building code requires the water meter to be upgraded if the fixtures being added exceed the current meter’s capabilities.

A gray water heater with a yellow warning label


Water Heater: Sizing and locating the water heater helps us to determine if the current water heater can properly supply the fixtures in the home, post-remodel. A larger water heater may need to be installed when a bathroom or a tub with a large capacity is added. 


Plumbing Stack: The plumbing stack is where all the sewer lines in a home come together and exit the house, connecting to the sewer system. Since water follows the flow of gravity, plumbing stacks are typically in the basement. Locating the plumbing stack helps us to trace plumbing lines though walls and floors back to each fixture. This allows us to plan plumbing changes in a way that minimizes plumbing costs.

Left: Plumbing stack in a basement before. Right: The stack painted to match the basement walls & ceiling, after.

Pink tiled vintage bathroom

Fixtures: Locating the centerline of each pluming fixture (sink, toilet, tub or shower drain, etc.) within a space allows us to plan around existing fixture locations, determine where new fixtures can be located, and how they’ll tie into the plumbing stack.



Electrical Systems:


Electrical Panel: The electrical panel tells us how much power is supplied to the house, and how much of that power is currently being used. Seeing empty spots on an electrical panel is always a good sign, telling us that the panel has the capacity to handle additional load. Locating the panel is important since planning around its existing location is more cost effective than having to relocate it.


Electric Meter & Connection: When planning an addition, knowing where the electric meter, nearest power pole, and connecting power line are allows us to plan the size and location of the addition without having to alter the location of the meter and connecting power line.

Outlets, Switches & Fixtures: Documenting every outlet, switch, and fixture helps us, and our electrician, to plan future electrical layouts in a way that utilizes existing wiring (if it is in good condition) and account for adjustments when moving walls.

 


Follow along for Part 3 of our Site Measure Series, which will cover which structural systems are important to capture and why!

See More Stories

Induction Cooktop
By Holly Collum April 15, 2025
Learn about the benefits and drawbacks of induction cooking, a modern kitchen technology that offers efficiency and precision in culinary tasks.
A classic blue car in an open garage with a basketball hoop. Adjacent white house.
By Anne De Wolf February 24, 2025
The essential guide to garage design, remodeling, and rebuilding for Portland's vintage homes. Learn how to navigate codes, historic guidelines, and design considerations.
Tile carpt
By Anne De Wolf February 22, 2025
Discover 10 essential mudroom features that combine style and function. From durable flooring to smart storage solutions, learn how to design a mudroom that keeps your home organized and adds lasting value.
Lonesome Pictopia's Northwestlake wallpaper tells complex stories of Northwest nature and history.
By Anne De Wolf January 30, 2025
From bold murals to hidden cabinet surprises, explore creative ways to add character and emotion to your home design.
Rustic kitchen with wooden island and cabinets, stainless steel appliances, and white walls.
By Anne De Wolf November 20, 2024
Modernize your heritage home without losing its charm. Learn to handle electrical upgrades, plumbing challenges, and structural issues in older Portland homes with expert renovation tips.
Vaulted interior living room of the Edward Dimmit House in the Columbia River Gorge.
By anne November 20, 2024
Discover the historic Edward Dimmit House, built in 1932 for a renowned postcard photographer of the Columbia River Gorge. See how Arciform transformed this Tudor home while preserving its rustic charm.
SEE MORE STORIES