← Yeti Trades Co. · Portfolio Ampersand Electric · portfolio site Get a site like this for $1,999 →
Old wiring

Old isn’t always dangerous. Some of it is.

Denver has thousands of houses with original wiring. Some of it is fine. Some of it has been buried in insulation or spliced by three owners. We tell you which.

Ampersand / Old wiring
A tangle of old wiring in an open wall box

What we find.

Pre-1940

Knob-and-tube

Two separate wires on porcelain knobs. Not dangerous on its own; dangerous when buried in insulation or spliced into. Insurers often ask about it.

1965–1973

Aluminum branch wiring

Fine wire, problem connections. Specific connectors fix it without a full rewire.

Any age

Two-prong outlets

Ungrounded circuits. GFCI protection or new grounded circuits, depending on what you plug in.

Old wiring prices.

01
Knob-and-tube assessment

Attic and basement mapped, written report.

flat
$295
02
Partial rewire

Circuit by circuit, priced per circuit.

per circuit
from $750
03
Whole-house rewire, 1,400 sq ft

Plaster-friendly fishing, patching included.

from
$14,500

Related circuits.

PanelsPanel upgradesOften done together.LightingLightingWhile the walls are open.NotesField notesWhat we’ve found.
A rusty old fuse box on a crumbling wall
Old metal switch boxes on a grey wall
Wires and connectors in a hole in a plaster wall
An orange ladder in a gutted room with exposed wiring

Buying an old house? Get it mapped.

Get a quote
A Yeti Trades Co. portfolio site

The electrician’s site, built in seven days.

Sixteen pages: a working panel-load calculator, EV charger pricing with the Xcel rebate explained, an honest page on when you don’t need a service upgrade, and the license number on every screen.

Start my website All thirteen sites →