Start Here | Character Retention

Keep Your Character Home and Add Units: The Retention-Plus-Infill Model

The model is straightforward. Retain the existing character or heritage home. Build new infill units behind or beside it. Keep the neighbourhood street character. Add density where it is least visible.

Key Takeaways

✓Retention-plus-infill can produce 3-4 units on a single lot while keeping the original home intact.
✓Simple configurations (home + laneway) often do not require an HRA — base SSMUH zoning is enough.
✓Cost per unit can be $100-150K lower than full demolish-and-build because you skip the main structure.
✓Cities increasingly reward this model with faster approvals and fewer objections from neighbours.

Why Cities Reward Retention

Cities reward it

Heritage retention aligns with municipal goals for neighbourhood character, gradual densification, and cultural preservation. This alignment translates into density bonuses, fee reductions, and faster approvals in some cases.

Neighbours accept it

Demolition in established neighbourhoods generates opposition. Retention-plus-infill is visually less disruptive. The heritage home stays. New units are smaller and set behind. The street frontage barely changes.

Cost structure can work

Restoration is expensive, but you are not building a full new building on the main footprint. The retained home already provides one or two units. The new construction is only the infill portion.

Tax benefits compound

The heritage property tax exemption (40-50% in Vancouver) applies to the whole property, not just the heritage building. On a $2M assessed value, that is $4,000-6,000/year in savings — every year, permanently.

Typical Configurations

Character Home + Laneway House

2 total

Retain the existing character home. Build a laneway house at the rear of the lot. The simplest retention-plus-infill configuration.

Best For

Standard-width lots (33 ft+) with rear lane access. Works under base SSMUH in many municipalities without an HRA.

Character Home + Garden Suite + Secondary Suite

3 total

Retain the character home with a secondary suite inside it. Add a detached garden suite in the rear yard. Three independent units from one lot.

Best For

Lots with enough depth (100 ft+) to accommodate the garden suite setbacks while keeping the character home footprint intact.

Character Home + Duplex/Triplex Infill

3-4 total

Retain the character home. Build a new duplex or triplex structure behind or beside it. This is the configuration that usually requires an HRA for the extra density.

Best For

Larger lots (50 ft+ wide, 120 ft+ deep) or lots where the HRA provides enough bonus FSR to make the infill building viable.

Cost Comparison: Retention vs Demolition

Retention + Infill (2 new units)

Restoration

$100-200K

New Construction

$500-700K (2 infill units)

Total Range

$600K-900K

Cost Per Unit

$200-300K

Demolish + Full Multiplex (4 units)

Restoration

New Construction

$1.2-1.8M (full 4-plex)

Total Range

$1.2M-1.8M

Cost Per Unit

$300-450K

Ranges are 2025-2026 Metro Vancouver estimates for wood-frame construction. Actual costs vary by site conditions, finishes, and contractor availability. Restoration costs can escalate significantly if hidden structural issues are discovered.

When To Retain vs When To Demolish

Property is on heritage register

Strong signal to retain. Demolition may not even be permitted.

Heritage home is structurally sound

Retention is cheaper when the foundation, framing, and roof are in good condition.

Lot has rear lane access

Lane access makes infill construction and servicing much simpler.

HRA density bonus is 0.15 FSR+

The bonus justifies the heritage process complexity.

Heritage home has severe structural issues

Restoration costs escalate fast. Demolition may be the rational choice.

Lot is narrow (less than 33 ft)

Hard to fit meaningful infill beside a retained home. Side setbacks eat the lot.

Heritage bonus is marginal (under 0.10 FSR)

The extra process may not be worth it. Standard SSMUH may deliver the same result.

No heritage register listing

Retention is voluntary. Run the numbers against demolish-and-build with no heritage premium.

Best For

✓ Owners who value the existing character home and want to keep it as part of the project.
✓ Lots with rear lane access and enough depth to accommodate infill behind the retained home.
✓ Properties on the heritage register where demolition may not be permitted anyway.

Usually Fails When

✕ The heritage home has severe structural problems that make restoration cost-prohibitive.
✕ The lot is too narrow to fit infill beside the retained home with required setbacks.
✕ The owner wants maximum unit count and the retention path delivers fewer units than demolish-and-build.

What To Verify Before Spending Money

→ Structural assessment of the existing home — foundation, framing, roof, and envelope condition.
→ Whether base SSMUH zoning already allows the desired infill or whether an HRA is required.
→ Side-by-side cost estimate for retention + infill versus demolish + full multiplex.

Frequently Asked Questions

Does retaining a character home always require an HRA? +

No. If the base SSMUH zoning already allows the units you want — for example, a secondary suite plus a laneway house — you can retain the character home and add infill under standard zoning. The HRA is only needed when you want bonus density, relaxed setbacks, or other concessions beyond what base zoning provides.

What counts as a "character home" versus a "heritage home"? +

A heritage home is on a municipal heritage register or has formal heritage designation. A character home has architectural or historical merit but is not formally listed. The distinction matters because heritage homes have stronger protection (and stronger incentives), while character homes have more flexibility but fewer financial benefits from heritage programs.

Can I move the heritage home on the lot to make room for infill? +

Sometimes. Some HRAs include provisions for lifting and moving the heritage home on the same lot — for example, sliding it forward to create more rear yard for infill. This adds $50-100K in costs but can make an otherwise impossible site plan work. The Heritage Commission must approve the move.

What happens if the heritage home burns down or is severely damaged? +

The heritage covenant still applies. If the building is destroyed, the owner is typically required to rebuild it to the original character using the conservation plan as a guide. Insurance should cover this, but the heritage insurance requirement is one more cost to factor into the retention model.

Check Your Heritage Lot's Multiplex Potential

Enter any BC address to check heritage register status, lot eligibility, and whether an HRA could unlock bonus density on your property.