Estimated Read Time: 12 minutes
Flickering lights, warm outlets, or tripping breakers are early warnings that it’s time to start replacing old electrical wiring. If your home still has knob-and-tube, aluminum branch circuits, or a tired panel, this guide explains how to make it safe and reliable. You’ll learn what’s involved, how long it takes, what it costs in the Denver metro, and how Fix-it 24/7 minimizes disruption while bringing your system up to code.
Why replacing old wiring matters
Old or undersized wiring was never designed for today’s loads. Space heaters, EV chargers, induction ranges, and server-hungry Wi‑Fi all strain aging circuits. Risks include overheating conductors, loose connections, arc faults, and nuisance tripping that can mask a real hazard. If you plan a kitchen remodel or add HVAC equipment, you need circuits that are safe, grounded, and correctly sized.
Common legacy wiring types we find across the Denver metro:
- Knob-and-tube (pre-1940s)
- No ground conductor, splices in open air, and insulation that can become brittle.
- Cloth-sheathed or rubber-insulated cable (1940s–1960s)
- Insulation degrades over time and can crack with heat.
- Aluminum branch-circuit wiring (late 1960s–early 1970s)
- Prone to connection creep and overheating without approved terminations.
- Outdated panels and breakers
- Insufficient capacity, limited spaces, and older equipment that may not meet current safety standards.
Two hard facts to ground your plan:
- Since 2002, AFCI protection has been required for many dwelling circuits, and the 2020–2023 NEC expanded it to more areas. This changes how circuits must be protected when you rewire.
- GFCI protection is required in kitchens, bathrooms, garages, basements, and outdoor areas under current code. Any new or replaced receptacle in these locations must comply.
Signs your house needs a wiring upgrade
You do not need to guess. If you see any of the following, schedule an evaluation before adding appliances or starting a remodel.
- Frequent breaker trips or fuses blowing
- Dimming or flickering lights when appliances start
- Warm or discolored outlets and switches
- Two-prong receptacles with no ground
- Aluminum branch wiring or visible knob-and-tube
- Buzzing from the panel or outlets
- Not enough receptacles, heavy use of power strips
- A home inspection calling out double taps or outdated equipment
If you notice any of these, replacing old electrical wiring becomes a safety issue. Our licensed electricians can confirm the cause and map a plan that fits your budget and timeline.
What whole-home rewiring actually includes
Whole-house rewiring is more than pulling new cable. It is a coordinated project designed to bring your system up to code and support modern loads.
Typical scope:
- Plan and permit
- Load calculation to size service and circuits
- Circuit-by-circuit design for kitchens, baths, laundry, HVAC, and EVs
- Permit submission and scheduled inspections
- Panel and service upgrades as needed
- Replace undersized or crowded panels and add spaces
- Install new grounding and bonding
- New branch-circuit wiring
- Dedicated circuits for high-demand appliances
- Properly grounded receptacles and tamper-resistant devices
- Protection and safety devices
- AFCI and GFCI protection per current code
- Smoke and CO detectors interconnected where required
- Device and lighting updates
- New outlets, switches, and lighting wiring
- Final inspection and documentation
- Labeling, test reports, and homeowner orientation
We carefully plan each rewiring project to minimize disruption to your daily routine. Our teams stage work room by room, keep essential circuits live when possible, and clean daily.
Permits, inspections, and Denver‑area code notes
Electrical work that involves new wiring or panel changes requires a permit in most Colorado municipalities. That includes Denver, Aurora, Lakewood, Thornton, Arvada, Boulder, Westminster, and surrounding cities. Expect two inspections: rough-in before drywall closes and final after devices are set.
Local facts to know:
- Licensed and insured contractors must pull the permit. DIY permitting for homeowners is restricted and may not be allowed in multifamily dwellings.
- Many Front Range jurisdictions process permits within 1–3 business days for standard projects. Complex service upgrades can take longer.
- Kitchens and bathrooms must have GFCI protection and dedicated small-appliance circuits. Laundry areas require a dedicated circuit. Bedrooms, living rooms, and similar areas generally require AFCI protection.
Fix-it 24/7 handles all permitting and inspection requirements and keeps your project aligned with current local codes and industry best practices.
How long does replacing old wiring take?
Timelines depend on home size, access, and finish materials.
- 1,000–1,500 sq ft: 3–5 working days after permit approval
- 1,600–2,400 sq ft: 5–8 working days
- 2,500+ sq ft or plaster walls: 7–12+ working days
Expect two inspection milestones. We coordinate directly with the city and keep you updated, so there are no surprises.
What does it cost to rewire a house?
Costs vary with size, access, and whether the electrical service needs an upgrade.
Typical ranges in the Denver metro:
- Partial rewiring for targeted areas: often 2,500–7,500
- Whole-home rewiring for average homes: often 8,000–20,000+
- Service and panel upgrade combined with rewiring: commonly 3,000–6,500 additional depending on amperage and conditions
What affects price:
- Square footage and number of circuits
- Panel capacity and condition
- Wall type and access points
- Number of specialty circuits for EVs, spas, or workshops
- Fixture and device selections
We provide transparent, flat-rate pricing. You receive a detailed scope with a fixed investment before work begins.
Partial vs. whole-home rewiring: choosing the right path
Not every home needs immediate full replacement. We often design phased plans to match budget and urgency.
Choose partial rewiring when:
- A remodel is limited to a kitchen, bath, or basement
- Only aluminum branch circuits serve a few rooms
- The panel is modern but select circuits are overloaded or ungrounded
Choose whole-home rewiring when:
- Knob-and-tube or cloth-insulated cable is widespread
- The panel is outdated, undersized, or lacks space for AFCI and GFCI protection
- Grounding and bonding are inadequate across the home
- You plan major renovations in multiple areas over the next 12–24 months
We can deliver a step-by-step roadmap that sequences high-risk areas first, then finishes the remaining circuits later without duplicating work.
How we minimize disruption during rewiring
Electrical upgrades should not take over your life. Here is how we protect your home and routine:
- Room-by-room scheduling with daily progress updates
- Floor protection, dust control, and daily cleanup
- Strategic hole placement to reduce patching
- Temporary power solutions to keep essentials running
- Clear labeling so you know what is off and when it will be back on
Our whole house rewiring service is planned to reduce wall damage and downtime while still meeting safety and code requirements.
Safety and quality standards you should expect
Every job we complete meets or exceeds local electrical codes and industry best practices. Look for these standards on any proposal you consider:
- Proper load calculations and an updated panel schedule
- Dedicated small appliance circuits in kitchens and laundry
- Full equipment grounding and bonding
- Correct wire sizing and terminations with torque verification
- AFCI and GFCI protection where required
- Interconnected smoke and CO alarms per code
- Labeled circuits and an as-built diagram when complete
Fix-it 24/7 maintains comprehensive insurance coverage and documents these steps so you have confidence in the finished system.
Add-ons that future‑proof your home
A rewiring project is the ideal time to prepare for emerging needs. Consider:
- EV charger installation wiring and a dedicated 240V circuit
- Kitchen and bathroom electrical wiring for future appliance upgrades
- Smart home wiring integration for security, networking, and lighting control
- Garage and workshop wiring with task lighting and higher amperage circuits
- Outdoor and landscape lighting circuits with GFCI protection
- Surge protection at the service and point-of-use for sensitive electronics
Planning these now reduces cost and avoids opening walls later.
Choosing the right electrician for rewiring
Whole house rewiring is a specialty. Hire a contractor with the right credentials and process.
- Licensing, bonding, and insurance in Colorado
- Proven experience with older homes in neighborhoods like Park Hill, Harvey Park, and Boulder’s Martin Acres
- Clear, flat-rate proposals with detailed circuit counts
- Permit and inspection handling included
- 24/7 emergency response for unforeseen issues
- A workmanship guarantee and strong reviews that mention major electrical projects
Fix-it 24/7 is licensed and insured, offers 24/7 emergency service, and backs work with a Quality Workmanship Guarantee and a 100% satisfaction promise.
Frequently overlooked hazards in older homes
Even if lights work, hidden risks may exist.
- Backstabbed receptacles that loosen over time
- Mixed aluminum and copper without approved connectors
- Ungrounded three-prong outlets that imply false protection
- Over-fused circuits where conductor size does not match breaker size
- Aging bathroom and kitchen circuits with no GFCI protection
A comprehensive evaluation identifies these issues and prioritizes them by risk so you can act confidently.
What to expect on day one
- Meet your lead electrician and review the plan
- Protect floors and furnishings
- Shut power to targeted areas and verify circuits are de-energized
- Open strategic access points and begin pulling new cable
- Daily cleanup and a status check before we leave
By final day, we complete device installation, labeling, testing, and walkthrough, then coordinate your final inspection.
Why homeowners choose Fix‑it 24/7 for whole-home rewiring
- Transparent, flat-rate pricing with no hidden surprises
- Permits and inspections handled for you
- Licensed, background-checked electricians
- 24/7 emergency availability
- Thousands of 5-star reviews and an A+ BBB rating
- Careful planning to minimize disruption to your daily routine
From complete home rewiring for older properties to circuit installation and expansion, EV charger wiring, and lighting system wiring, we deliver safe, modern power where you need it most.
What Homeowners Are Saying
"Did a full on kitchen remodel. New Main Distribution panel with several new dedicated circuits to kitchen for induction range, GFCI Safety outlets and power to disposal and dishwasher. Alex handled whole project... Recommend him for any electrical upgrades." –Marshall M., Electrical Upgrades
"My breaker box quit supplying almost all the power to my house late last night... A new main breaker box was installed... I was extremely stressed out initially and was very appreciative of the fast response... Great job team!!!" –Jessica N., Electrical Panel Replacement
"I knew I needed a new circuit breaker box... They gave me an estimate and got it done before I went on vacation. Thank you 24/7 you will get more business from me." –Tammera B., Circuit Breaker Box Service
"My main panel literally would shut off my power if you touched it... Everyone took great care of me... Great company and great people." –Kelsey J., Main Panel Repair
Frequently Asked Questions
How do I know if I need whole-home rewiring or just a few circuits?
If issues are isolated to a remodel area or a few aluminum circuits, partial rewiring may work. Widespread knob-and-tube, cloth cable, or grounding problems point to full rewiring.
Can I live at home during the project?
Yes, most homeowners do. We stage work room by room, keep key circuits live when possible, and clean daily. You will lose power in targeted areas during work hours.
Do I need a permit to replace old wiring?
Yes. Rewiring and panel work require permits and inspections across Denver-area cities. We handle all paperwork and schedule rough-in and final inspections.
Will my walls be destroyed?
No. Some access holes are required, but we plan routes to minimize patching and coordinate with drywall repair. Older plaster homes may need a few extra openings.
Are AFCI and GFCI breakers really necessary?
Yes. Current code requires AFCI and GFCI protection in defined areas to reduce shock and fire risks. Rewiring is the best time to add these safety devices.
Upgrading a home’s wiring is one of the highest‑impact safety investments you can make. If you are replacing old electrical wiring in Denver, Boulder, Aurora, or nearby, our licensed team will design a code‑compliant plan that fits your budget, timeline, and future needs. Expect permits handled, clear pricing, and minimal disruption from start to finish.
Ready for a safe, code‑compliant home? Call Fix-it 24/7 at (720) 577-4266 or schedule now at https://fixmyhome.com/. Ask about whole-home rewiring, panel upgrades, EV charger circuits, and smart home wiring. Get a fixed, flat-rate price before work begins.
Fix-it 24/7 Plumbing, Heating, Air & Electric is Denver’s trusted home-services partner. We’re licensed, bonded, and insured with an A+ BBB rating, thousands of 5-star reviews, and 24/7 emergency service. Expect honest flat-rate pricing, a 100% satisfaction guarantee, permits and inspections handled, and respectful techs who protect your home. From whole-home rewiring to panel upgrades, we deliver safe, code-compliant work that lasts.