// NYC · Master Licensed · All 5 Boroughs
Home Rewiring & Wiring Replacement NYC
Knob-and-tube replacement, aluminum wiring remediation, and full home rewiring for NYC’s older housing stock — done right, with minimal disruption and full DOB compliance.
- Knob-and-tube wiring replacement
- Aluminum branch circuit remediation
- Full home rewiring
- Insurance compliance certification
- Minimal wall opening — we fish wires where possible
- DOB permit & inspection included
Knob-and-tube wiring — what it is and why it matters in NYC
Knob-and-tube (K&T) wiring was standard from the 1880s through the 1940s. It consists of individual conductors run through ceramic knobs (for support) and ceramic tubes (through wood framing), with no ground wire. Most NYC homes built before 1950 still have some — or all — of their original K&T wiring.
Why insurers flag it: K&T wiring lacks a ground wire, making it incompatible with three-prong appliances and devices. More critically, it relies on open-air cooling — adding insulation over K&T in walls and attics is a known fire hazard because it traps heat. Most NYC insurers now refuse coverage or charge significant premiums on homes with active K&T in service.
K&T isn’t automatically dangerous if it’s original, undisturbed, and not covered by insulation. What makes it dangerous is age-related insulation brittleness, improper splices added over the decades, and the addition of attic or wall insulation. Our inspection assesses the actual condition — not a blanket “K&T = replace everything” recommendation.
Before you commit to rewiring: Our wiring assessment ($250–$400) documents the exact extent and condition of your K&T wiring, which circuits are affected, and whether partial replacement or full rewiring makes more sense for your home and budget.
Aluminum wiring — the other common NYC issue
From the mid-1960s through the 1970s, aluminum was widely used for branch circuit wiring in residential construction as a cheaper alternative to copper. Many NYC homes and co-ops built in this era — particularly in Queens, the Bronx, and parts of Brooklyn — still have aluminum branch circuit wiring.
The problem: Aluminum expands and contracts more than copper with temperature changes, which over decades can cause connections to loosen at outlets, switches, and the panel. Loose connections create heat and arcing — the leading cause of electrical fires in homes with aluminum wiring.
The solutions: Full replacement with copper wiring is the most thorough fix but also most expensive. The practical and often preferred solution for NYC co-ops and condos (where wall access is limited) is CO/ALR outlet and switch replacement throughout, combined with anti-oxidant compound treatment at all connection points and the panel. This is accepted by NYC DOB and most insurers when documented correctly.
What a rewiring project actually involves in an NYC home
Wiring assessment
We inspect your home, document the type and extent of existing wiring, assess access conditions, and identify which circuits need replacement. You receive a written report and fixed-price quote.
Scope definition
We agree on scope: full rewiring, partial (specific circuits), knob-and-tube replacement only, or aluminum remediation. Many NYC jobs are partial — we don’t sell more than what’s needed.
DOB permit filing
All rewiring work requires a DOB electrical permit. We file, track approval, and schedule around the permit timeline.
Wiring installation
We fish new wiring through existing walls wherever possible to minimize drywall disruption. Where walls must be opened, we use the smallest practical opening. We work in sections to keep portions of the home powered throughout.
Outlet, switch, and fixture updates
All outlets are upgraded to grounded three-prong, GFCI where required by code. Switch locations updated. New panel connections made.
DOB inspection and closeout
We schedule and attend the DOB inspection. On sign-off, you receive the Certificate of Electrical Inspection — required by most insurers to update coverage after rewiring.
Do you actually need to rewire your whole home?
Not always. This is an important and honest question — full rewiring is a significant investment and not always necessary.
Partial rewiring often makes more sense for NYC brownstones and apartments where some circuits are original K&T and others have been updated over the decades. We replace only what needs replacing.
Aluminum remediation (CO/ALR replacement + panel treatment) is a cost-effective alternative to full rewiring for 1960s–70s construction, accepted by NYC DOB and most insurers.
When full rewiring is the right call: Original wiring throughout with no updates, extensive K&T with insulation cover, aluminum wiring with multiple problem connection points, or a home that’s being substantially renovated and walls are already open.
Get the assessment first. Our written wiring assessment ($250–$400, credited toward any rewiring work) gives you the information to make the right decision — not a sales pitch for more work than you need.
Frequently asked questions
Full home rewiring in NYC typically costs $2,500–$12,000 depending on home size, wiring type (K&T vs aluminum vs mixed), access conditions, and scope. Knob-and-tube replacement for a typical NYC brownstone floor runs $3,000–$6,000. We provide a written fixed-price quote after a wiring assessment.
K&T wiring isn’t automatically dangerous if it’s original, undisturbed, and not covered by insulation. What makes it hazardous is age-related insulation deterioration, improper splices added over the decades, and insulation added over K&T in walls or attics. Our assessment tells you the actual condition — not a blanket replace-everything recommendation.
We fish new wiring through existing walls wherever possible using flexible drill bits and fish tapes — this avoids most wall opening. Some access points are unavoidable (typically at the panel, at certain junction boxes, and where wiring runs through structural members), but we keep them minimal and patch cleanly.
Most insurers want a Certificate of Electrical Inspection from a NYC-licensed electrician documenting the wiring type, condition, and any remediation completed. We provide this as standard after any rewiring or remediation work, and can perform inspections specifically to generate this documentation.
Aluminum branch circuit wiring (common in NYC 1965–1975 construction) can loosen at connections over time, creating fire risks. The fix is either full replacement with copper, or CO/ALR outlet/switch replacement throughout combined with anti-oxidant treatment at all connections and the panel. We assess and recommend the right approach based on your home’s specific wiring condition.
Yes. All rewiring work in NYC requires a DOB electrical permit and must pass inspection. We handle all permitting as part of every rewiring project.
What our customers say
“We bought a 1920s brownstone with original knob-and-tube throughout. MP Electric did a full assessment, gave us a clear written scope, and rewired floor by floor with minimal wall damage. The DOB inspection passed first try.”
“Our Queens co-op had aluminum wiring and we couldn’t get homeowners insurance renewed. MP Electric did the CO/ALR remediation, provided the insurance certification, and we had coverage reinstated within two weeks.”
“Honest, thorough, and competent. They assessed our K&T and told us only two circuits needed replacement — not the whole house. Saved us thousands and the work was done perfectly.”
Get a free rewiring assessment
We visit your home, assess the type and extent of your existing wiring, and give you a written quote — no obligation. We only recommend what your home actually needs.