Seamless Additions that Respect Your Home’s Character

From compact bump-outs to second-storey builds, we engineer tie-ins, protect the building envelope, and plan work to minimize disruption—so your new space looks original to the home.

Modern Metro Contracting house addition — integrated design and weatherproofing in Vancouver
Structural coordination for complex tie-ins
Envelope expertise for West Coast weather
Minimal disruption planning & transparent budgets

Why Choose Us

Engineered Tie-Ins

We coordinate with your structural engineer to splice foundations, align loads, and upgrade shear/hold-downs where required.

  • Foundation dowels & waterproof transitions
  • Beam/joist alignment with existing framing
  • Inspection-ready detailing

Weather-Tight Envelope

Rain-screen assemblies, window/door flashing, and roof tie-ins that withstand coastal rain and wind.

  • Air & water testing approach
  • Continuous WRB & sill/jamb/head flashings
  • Roof membrane step/ledger integrations

Clean, Transparent Build

Phased access, dust control, and weekly budget/schedule updates keep you informed and comfortable at home.

  • Look-ahead schedules & inspection gates
  • Open allowances & change control
  • Post-completion support

Our Process

Feasibility. Zoning, site coverage, height, setbacks, utilities, and rough budget bands.
Design & Engineering. Measurements, drawings, structural design, envelope details, selections.
Permit. City submission, revisions, inspections scheduling strategy.
Build. Site protection, structural tie-ins, envelope/roof integration, MEP, interior finishes.
Final Inspection. Deficiency walk-through, occupancy coordination, handover package.

What You Get

Plans & Permitting

  • As-measured plans & working drawings
  • Permit set & responses to comments
  • Inspection tracking

Structural Coordination

  • Foundation/roof tie-in details
  • Framing layouts & specs
  • Engineer sign-off coordination

Site Protection Plan

  • Dust, floor & landscape protection
  • Weatherproof staging & temporary covers
  • Daily cleanup & safety protocols

Typical Timeline & Cost Range

Addition Type Typical Duration Typical Range (CAD) Notes
Rear/Lateral Addition Most common 24–36 weeks $250k–$650k Foundation tie-ins, rain-screen, window/door package, kitchen or living expansion.
Second-Storey Addition 28–44 weeks $350k–$800k+ Seismic/structural upgrades, stair insertion, roof removal/rebuild, MEP re-distribution.
Dormer/Attic Expansion 14–24 weeks $120k–$300k Roof framing changes, insulation/venting, skylights, bath/bed layouts.
Small Bump-Out (Nook/Mudroom) 10–16 weeks $80k–$180k Micro-foundation, WRB continuity, finishes to match existing.

*Ranges reflect Vancouver & the Lower Mainland. Final pricing is confirmed after design, engineering, and a site review.

Additions — FAQs

Can we add a second story?

Often, yes—subject to zoning, height limits, structural capacity, and seismic upgrades. We run a feasibility check against local bylaws and your existing structure before design.

What are typical budget ranges?

Most rear/lateral additions fall between $250k–$650k, while second-storey additions are commonly $350k–$800k+. Smaller bump-outs can start around $80k. We refine numbers after feasibility and design.

Will the new space match my home’s character?

Yes. We align siding profiles, trims, roof pitches, window/door proportions, and interior details (floors, casings, paint) to look original to the house.

Do you handle permits and engineering?

Yes. We coordinate structural engineering, drawings, permit submissions, and inspections—including responses to city comments.

Wondering what’s possible on your lot? Start with a fast zoning and structural feasibility review.

Modern Metro Contracting — House Additions Service Page

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