Renovating Old House Toronto Guide

Heron Renos Inc.
May 21, 2025

Table of Contents

Renovating an old house in Toronto is both an exciting adventure and a significant undertaking that requires careful planning, patience, and expertise. Whether you’ve inherited a family home, purchased a historic property, or fallen in love with a charming fixer-upper, transforming an older home can be incredibly rewarding.

However, old houses come with unique challenges that differ significantly from new construction or modern home improvements.

This comprehensive guide will walk you through every aspect of old house renovation, from initial assessment to final touches, helping you navigate the complexities while preserving the character and charm that drew you to the property in the first place.

Pre-Renovation Planning and Assessment

Conducting a Thorough Property Inspection

Before swinging a single hammer, invest in a comprehensive inspection by qualified professionals. Old houses often hide problems behind beautiful facades, and identifying these issues early can save thousands of dollars and months of frustration.

Start with a general home inspection, but don’t stop there. For houses built before 1978, arrange for lead paint testing. If your home was constructed before 1950, asbestos testing is crucial. Additionally, have the electrical system evaluated by a licensed electrician and the plumbing inspected by a professional plumber.

Pay special attention to the foundation, as settling and structural issues are common in older homes. Look for cracks in walls, uneven floors, doors that don’t close properly, and windows that stick. These can all indicate foundation problems that need immediate attention.

Understanding Your Home's History and Architectural Style

Research your home’s architectural style and historical significance. This knowledge will guide your renovation decisions and help you maintain the property’s authentic character. 

Contact your local historical society or check city records to learn about your home’s original construction date, previous owners, and any modifications made over the years. This information can reveal hidden features, explain unusual structural elements, and help you understand the home’s evolution.

Setting a Realistic Budget and Timeline

Old house renovations typically cost 20-30% more than initially estimated and take significantly longer than planned. Factor in unexpected discoveries like hidden structural damage, outdated wiring, or plumbing issues that weren’t apparent during the initial inspection.

Create a detailed budget that includes a 25-30% contingency fund for unexpected expenses. Break down costs by priority, distinguishing between essential safety and structural work versus cosmetic improvements. This approach allows you to tackle the most critical issues first while leaving room for upgrades as budget permits.

Consider the timeline carefully, especially if you’re planning to live in the house during renovation. Major systems work like electrical, plumbing, and HVAC should be completed before moving in, as these projects create significant disruption and may require you to vacate the property temporarily.

Essential Safety and Structural Considerations When Renovating Old House

Addressing Lead Paint and Asbestos

Lead paint and asbestos are serious health hazards commonly found in homes built before 1978 and 1950, respectively. Never attempt to remove these materials yourself, as improper handling can create dangerous exposure situations.

For lead paint, hire certified professionals who follow EPA RRP (Renovation, Repair, and Painting) rules. They’ll use specialized equipment and containment procedures to safely remove or encapsulate lead paint. If removal isn’t necessary, professional encapsulation can be a cost-effective alternative that seals the lead paint beneath new surfaces.

Asbestos requires even more specialized handling. Common locations include insulation, floor tiles, siding, and pipe wrapping. Professional asbestos abatement companies will test, contain, and remove these materials according to strict safety protocols. The cost is significant, but the health risks of improper handling are far greater.

Foundation and Structural Integrity

Foundation issues are among the most expensive problems to fix, but they’re also the most critical for your home’s long-term stability. Common foundation problems in old houses include settling, water damage, and deterioration of original materials like stone or brick.

If your inspection reveals foundation issues, consult with a structural engineer before proceeding with other renovations. Foundation repairs may require underpinning, waterproofing, or complete sections replacement. While expensive, addressing these problems early prevents more costly damage to the entire structure.

Pay attention to structural elements throughout the house. Original timber framing may have suffered from insect damage, rot, or previous modifications that compromised the structure. A structural engineer can assess load-bearing walls and recommend reinforcement where necessary.

Electrical System Modernization

Old houses often have electrical systems that are inadequate for modern needs and potentially dangerous. Knob-and-tube wiring, common in homes built before 1950, lacks grounding and may have deteriorated insulation. Similarly, early electrical panels may contain breakers or fuses that don’t meet current safety standards.

Plan for a complete electrical upgrade if your home has outdated wiring. This typically involves installing a new electrical panel, running new wiring throughout the house, and adding sufficient outlets for modern appliances and electronics. While disruptive and expensive, updated electrical systems are essential for safety and functionality.

Consider your electrical needs carefully during planning. Modern homes typically require 200-amp service, significantly more than older homes were designed to handle. Account for kitchen appliances, air conditioning, electric vehicle charging, and the numerous electronic devices common in today’s households.

Modernizing Core Systems

Plumbing Updates and Considerations

Old houses frequently have plumbing systems that combine original materials with decades of modifications and repairs. Galvanized steel pipes, common through the 1960s, often suffer from corrosion and reduced water pressure. Lead pipes, found in some very old homes, pose serious health risks and require immediate replacement.

When updating plumbing, consider replacing the entire system rather than patching individual problems. Modern PEX or copper piping offers better performance and longevity than trying to work around existing issues. This approach also allows you to reconfigure bathrooms and kitchens more freely during renovation.

Plan water pressure and drainage carefully, as old houses may have inadequate water service or compromised sewer connections. Installing a pressure booster system or updating the main water line may be necessary to achieve acceptable performance throughout the house.

HVAC System Planning

Many old houses lack central heating and cooling systems, relying instead on radiators, window units, or space heaters. Adding modern HVAC requires careful planning to minimize disruption to the home’s character while providing comfortable, efficient climate control.

Ductwork installation is one of the biggest challenges in old house HVAC upgrades. Running ducts may require creative routing through walls, floors, or attic spaces while preserving architectural details. Mini-split systems offer an alternative that provides zoned cooling and heating with minimal modifications to the existing structure.

Consider the home’s insulation and air sealing needs alongside HVAC installation. Old houses typically have poor insulation and numerous air leaks that make heating and cooling expensive and ineffective. Addressing these issues improves comfort and reduces energy costs significantly.

Insulation and Energy Efficiency

Improving insulation and energy efficiency in old houses requires balancing modern performance with preservation of original character. Many old houses have little or no insulation, making them expensive to heat and cool while being uncomfortable in extreme weather.

Blown-in insulation can often be added to wall cavities without major disruption, though this requires careful assessment to ensure proper installation without creating moisture problems. Attic insulation is typically easier to upgrade and provides significant energy savings with minimal impact on the home’s appearance.

Air sealing is equally important and often provides better return on investment than insulation alone. Professional energy audits can identify the most significant air leaks and recommend cost-effective improvements.

Weatherstripping, caulking, and sealing around penetrations can dramatically improve comfort and energy efficiency.

Preserving Character While Updating

Maintaining Original Architectural Features

One of the greatest appeals of old houses is their unique architectural character, often featuring details and craftsmanship rarely found in modern construction. Preserving these elements while updating for modern living requires careful planning and sometimes creative solutions.

Original hardwood floors, decorative moldings, built-in cabinetry, and unique architectural details like stained glass or ornate metalwork should be preserved whenever possible. These features often define the home’s character and are expensive or impossible to replicate authentically.

When original features are damaged, explore restoration options before considering replacement. Professional restoration services can often repair damage that seems irreparable, maintaining the home’s authenticity while ensuring durability for years to come.

Choosing Period-Appropriate Materials and Fixtures

When updates are necessary, selecting materials and fixtures that complement the home’s original period helps maintain architectural integrity. This doesn’t mean everything must be original or antique, but thoughtful selection ensures new elements harmonize with existing character.

Consider salvaged or reproduction materials when original elements need replacement. Architectural salvage yards often carry period-appropriate fixtures, hardware, and building materials that maintain authenticity while providing modern functionality.

Balancing Modern Convenience with Historic Character

Successfully renovating old houses requires finding creative ways to incorporate modern conveniences without compromising historic character. This often means hiding modern systems behind period-appropriate facades or integrating technology in unobtrusive ways.

Kitchen and bathroom updates present particular challenges, as these spaces require modern functionality while maintaining period character. Custom cabinetry that mimics historical styles, reproduction fixtures, and carefully selected materials can provide contemporary performance with authentic appearance.

Technology integration requires similar creativity.

Running modern wiring and internet cables while preserving original architectural details may require custom millwork or creative routing. Planning these systems early in the renovation process makes integration much easier and less disruptive.

Room-by-Room Renovation Strategies

Kitchen Renovation in Historic Homes

Kitchen renovation in old houses requires balancing modern functionality with period character. Many old houses have small kitchens that don’t meet contemporary needs for storage, counter space, and appliance accommodation.

Consider whether expansion is possible and appropriate for your home’s style. Sometimes removing a wall to adjacent dining rooms or pantries can create needed space while maintaining the home’s flow and character. However, ensure any wall removal is structurally safe and historically appropriate.

When expansion isn’t feasible, maximize efficiency through thoughtful design. Custom cabinetry can provide more storage than standard units while incorporating period-appropriate details. Consider appliance placement carefully, as old houses may have limitations on electrical capacity or gas line locations that affect appliance selection and positioning.

Bathroom Updates and Additions

Bathrooms in old houses often require complete renovation to meet modern standards for safety, functionality, and comfort. Many older homes have only one bathroom or bathrooms that are awkwardly located or inadequately sized.

Adding bathrooms requires careful planning for plumbing routing and adequate ventilation. Consider locations that minimize plumbing runs and structural modifications while providing convenient access. Second-floor bathroom additions may require reinforcing floor joists to support the additional weight of fixtures and water.

Period-appropriate fixtures and finishes can maintain historical character while providing modern performance. Clawfoot tubs, pedestal sinks, and subway tile are classic choices that work in many architectural styles while offering contemporary functionality.

Living Spaces and Bedrooms

Living spaces in old houses often have excellent bones but may need updates for modern living patterns. Room layouts that made sense in earlier eras may not suit contemporary furniture and entertainment needs.

Consider carefully before removing walls or making major layout changes. Many old houses have beautiful architectural flow that shouldn’t be disrupted. Instead, look for ways to enhance existing spaces through improved lighting, updated electrical outlets, and thoughtful furniture placement.

Bedroom renovations typically focus on improving comfort and functionality while preserving character. Adding adequate electrical outlets, improving lighting, and ensuring proper climate control are common priorities. Built-in storage solutions can maximize space efficiency while maintaining period character.

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Common Pitfalls When Renovating An Old House and How to Avoid Them

Underestimating Costs and Timeline

The most common mistake in old house renovation is underestimating both costs and timeline. Unlike new construction, old houses frequently reveal unexpected problems that require immediate attention and additional budget allocation.

Plan for contingencies by setting aside 25-30% of your budget for unexpected issues. Create a priority list that distinguishes between essential safety work and desired improvements, allowing you to adjust scope if unexpected costs arise. This approach prevents project delays and ensures critical work gets completed even if budget overruns occur.

Establish realistic timelines that account for the discovery phase inherent in old house renovation. Each wall opened or system examined may reveal additional work that affects the overall schedule. Building buffer time into your timeline reduces stress and allows for thorough, quality work.

DIY vs. Professional Work Decisions

While DIY work can reduce costs, old houses often present complex problems that require professional expertise. Knowing when to tackle projects yourself and when to hire professionals is crucial for both safety and cost control.

Structural work, electrical systems, plumbing, and hazardous material handling should always be left to licensed professionals. These areas present serious safety risks and typically require permits and inspections that DIY work cannot satisfy.

Focus DIY efforts on projects that match your skill level and don’t affect safety systems. Painting, simple carpentry, and finish work can provide cost savings while allowing you to maintain quality control over details that matter to you.

Permit and Code Compliance Issues

Old houses often have systems and modifications that don’t meet current building codes, creating complex compliance situations during renovation.

Understanding permit requirements and code implications prevents costly delays and legal problems.
Consult with local building departments early in planning to understand permit requirements and code compliance expectations. Some jurisdictions have specific requirements for historic properties that differ from standard residential codes.

Consider hiring experienced professionals like Heron Renos Inc. familiar with old house renovation and local code requirements. Their experience can help navigate complex compliance issues while finding solutions that satisfy safety requirements without compromising historical character.

Working with Contractors and Professionals

Finding Qualified Specialists

Old house renovation requires contractors and specialists who understand the unique challenges of working with historic properties. General contractors experienced with modern construction may not have the specialized knowledge needed for old house projects.

Interview potential contractors carefully, asking about their experience with houses from your home’s era and architectural style. Request references from recent old house projects and visit completed work if possible to assess quality and appropriateness of their approach.

Communication and Project Management

Clear communication is essential for successful old house renovation, as projects often evolve as hidden conditions are discovered. Establish regular communication schedules with contractors and maintain detailed documentation of decisions and changes.

Create detailed contracts that acknowledge the discovery nature of old house work while establishing clear procedures for handling unexpected conditions. Include provisions for additional work authorization and change order procedures that protect both parties while maintaining project momentum.

Regular site visits and progress meetings help identify issues early and maintain project quality. Document progress with photographs and maintain detailed records of work completed, materials used, and decisions made throughout the project.

Managing Costs and Changes

Cost management in old house renovation requires flexibility while maintaining budget control. Unexpected discoveries are inevitable, but proper planning and communication can minimize their impact on overall project costs.

Establish clear procedures for handling additional work, including written authorization requirements and cost documentation. This approach prevents scope creep while ensuring necessary work gets completed promptly.

Prioritize work based on safety, functionality, and importance to overall project success. This framework helps make decisions when unexpected costs arise and ensures critical work gets completed even if budget constraints require deferring less essential improvements.

Next Steps for Renovating An Old House Toronto

Renovating an old house in Toronto or the surrounding areas is a complex but rewarding endeavor that requires careful planning, realistic expectations, and appreciation for historical character. Success depends on thorough preparation, appropriate professional help, and understanding the unique challenges that come with older properties.

The key to successful old house renovation lies in balancing respect for historical character with modern functionality and safety requirements. This balance requires patience, creativity, and often compromise, but the results can be truly spectacular homes that offer both charm and comfort.

Remember that old house renovation is typically a long-term process rather than a quick transformation. Approach your project with realistic timelines and budgets, focus on safety and structural integrity first, and enjoy the process of uncovering and preserving the unique character that makes your old house special.

With proper planning, appropriate professional help, and commitment to quality work, your old house renovation can create a beautiful, functional home that honors its history while serving your family’s needs for generations to come. The investment in time, money, and effort pays dividends in both personal satisfaction and long-term property value.

Contact Heron Renos Inc. for a free quote to discuss renovating an old house Toronto.

Frequently Asked Questions About Renovating Old Houses

Get the answers to your questions about renovating an old house in the Greater Toronto Area. 

Yes, most renovation work in Toronto requires permits. The City of Toronto requires building permits for structural changes, electrical work, plumbing modifications, HVAC installations, and additions. Interior renovations like kitchen and bathroom updates typically need permits, while minor cosmetic work like painting usually doesn’t. Always check with Toronto Building Services before starting work, as unpermitted renovations can result in stop-work orders and costly remediation.

Toronto has over 9,000 heritage-designated properties. You can check if your property is heritage-designated using the City’s Heritage Register online. Heritage designation doesn’t prevent renovation but requires additional approvals for exterior changes and sometimes interior modifications. You’ll need to submit a Heritage Permit Application for any work affecting heritage attributes. The approval process typically takes 30-60 days and may require architectural drawings and conservation plans.

Simple renovation permits typically take 3-6 weeks for approval, while complex projects can take 8-12 weeks or longer. Heritage properties require additional time for heritage permit approval. Expedited review is available for an additional fee. Submit complete applications with detailed drawings and specifications to avoid delays. Consider hiring professionals familiar with Toronto’s permit process to streamline approval.

Phased renovation is often more practical for Toronto homeowners due to high costs and the need to maintain housing during long winters. However, consider that Toronto’s short construction season (April-October) may limit work timing. Combine related systems work (electrical, plumbing, HVAC) to minimize disruption and permit costs. If living in the house during renovation, complete heating system work before winter. Plan major work for spring/summer when weather permits exterior work and material delivery is easier.

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