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Cost Estimate Considerations and Assumptions - Area TakeoffsGFA1 - (unassigned) - GFA - Q1 144 m ²GFA (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 1,5031,8658,5351,5061,5086,102DEMOLITION - SITE PLAN69 - 02020 Site Demolition - Rmv Site Precast Stairs w/ 2 railings - Q1 3 m ²70 - 02020 Site Demolition - Rmv Sidewalk - Q1 19 m ²71 - 02020 Site Demolition - Rmv Curbs - Q1 17 m72 - 02020 Site Demolition - Rmv Asphalt - Q1 38 m ²73 - 02020 Site Demolition - Rmv City Sidewalk - Q1 33 m ²Demolition - Site (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 16,2911,1541,503DEMOLITION - FLOOR PLAN2 - 02025 Building Demolition - Rmv Drywall Partition 4267 - Q1 2 m ; Q2 9 m ²3 - 02025 Building Demolition - Rmv Door - Q1 11 EA4 - 02025 Building Demolition - Rmv Plywood Partition 3048 - Q1 2 m ; Q2 7 m ²5 - 02025 Building Demolition - Rmv Hot Water Heater - Q1 1 EA6 - 02025 Building Demolition - Rmv Furnace - Q1 1 EA7 - 02025 Building Demolition - Rmv Utility Sink (Plastic) - Q1 1 EA8 - 02025 Building Demolition - Rmv Windows - Q1 2 EA9 - 02025 Building Demolition - Rmv Exterior Brick Wall w/ Stud Backup 3500 - Q1 8 m ; Q2 29 m ²10 - 02025 Building Demolition - Rmv Exterior Brick Wall w/ Stud Backup 4000 - Q1 5 m ; Q2 19 m ²11 - 02025 Building Demolition - Rmv Slab on Grade - Q1 21 m ²13 - 02025 Building Demolition - Rmv Fdn Walls - Q1 14 m18 - 02025 Building Demolition - Rmv VCT Flooring - Q1 102 m ²19 - 02025 Building Demolition - Rmv Fixtures (Toilet / Sinks, etc.) - Q1 5 EA20 - 02025 Building Demolition - Rmv Drywall Partition 3607 - Q1 16 m ; Q2 57 m ²21 - 02025 Building Demolition - Rmv Drywall Partition Perimeter 3607 - Q1 52 m ; Q2 186 m ²22 - 02025 Building Demolition - Rmv Drywall Partition 2133 - Q1 2 m ; Q2 5 m ²23 - 02025 Building Demolition - Rmv Kitchenette - Q1 1 m ; Q2 1 EA24 - 02025 Building Demolition - Rmv Floor c/w framing - Q1 109 m ²35 - 02025 Building Demolition - Rmv Exterior Brick Wall (Original) 4000 - Q1 4 m ; Q2 18 m ²Demolition - Ground (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 16,291DEMOLITION - RCP1 - (unassigned) - GFA - Q1 144 m ²12 - 02025 Building Demolition - Rmv Shingled Roof w/ Plywood/Trusses & Insul - Q1 21 m ²14 - 02025 Building Demolition - Rmv ACT Ceilings tacked to trusses - Q1 99 m ²15 - 02025 Building Demolition - Rmv GB Ceilings tacked to trusses - Q1 8 m ²16 - 02025 Building Demolition - Rvm Light Fixtures - Q1 14 EA17 - 02025 Building Demolition - Rvm Clg Fans - Q1 2 EADemolition - RCP (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM EXISTING.pdf (3) (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 2,793EXISTING.pdf (4) (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 3,6011,666EXISTING.pdf (5) (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM Existing Structural.pdf (1) (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM Existing Structural.pdf (2) (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM Existing Structural.pdf (3) (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM Existing Structural.pdf (4) (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 8,5563,6025,8761,5556,7624,2708,529Existing Structural.pdf (5) (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 16,286GFA1 - (unassigned) - GFA - Q1 144 m ²GFA - New (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 1,340PARTITIONS & DOORS25 - 09 20 00 Gypsum Board - Perimeter Partition - 16gb/92ss/insul/extg brick 3606 - Q1 46 m ; Q2 164 m ²26 - 08 14 00 Wood Doors - Wood Doors - Q1 1 EA27 - 09 20 00 Gypsum Board - Interior Walls - NIC by tenant - Q1 19 m28 - 08 14 00 Wood Doors - Wood Doors (Heritage) - Q1 1 EA29 - 08 11 16 Aluminum doors/frames - Aluminum Doors - Q1 1 EA30 - 09 20 00 Gypsum Board - Perimeter Partition - 16shtg/92ss/insul/16gb 3606 - Q1 5 m ; Q2 19 m ²56 - 09 20 00 Gypsum Board - Perimeter Partition - 16gb/92ss/insul/16gb 3606 - Q1 3 m ; Q2 9 m ²76 - 04 21 00 Masonry - Concrete Block 140mm - 5576 avg - Q1 4 m ; Q2 22 m ²77 - 04 21 00 Masonry - Concrete Block 190mm - 5576 avg - Q1 4 m ; Q2 22 m ²78 - 04 21 00 Masonry - Concrete Block 140mm - 7500 avg - Q1 2 m ; Q2 19 m ²79 - 04 21 00 Masonry - Concrete Block 140mm - 5000 avg - Q1 2 m ; Q2 12 m ²80 - 04 21 00 Masonry - Concrete Block 90mm - 3606 avg - Q1 2 m ; Q2 12 m ²Partitions & Doors (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 3,913FLOORING37 - 09 61 19 Concrete Sealant - Conc Sealer - Q1 6 m ² ; Q2 4 m ³38 - (unassigned) - Bare Conc - Ready for Tenant Fit Out - Q1 123 m ² ; Q2 54 m75 - 09 30 13 Ceramic Tiling - CT to WR Walls 3m high - Q1 17 m ; Q2 51 m ²Flooring (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM RCP39 - 09 50 00 Ceilings - T&G Wood Ceiling (Sloped) - Q1 149 m ²47 - 09 50 00 Ceilings - Sloped Ceiling (Backup) - 13ply/92ss/insul/extg roof bds - Q1 149 m ²51 - 09 20 00 Gypsum Board - GB Ceilings - Q1 18 m ²52 - 09 90 00 Painting - Exposed Ceilings - Q1 6 m ²Ceilings (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM MILLWORK53 - (unassigned) - No Millwork - NIC by tenant - Q1 1 EAMillwork (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM ROOFING48 - 07500 Roofing & Sheet Metal - Membrane Roofing - Q1 21 m ²49 - 07500 Roofing & Sheet Metal - Parapets - Q1 13 m50 - 07500 Roofing & Sheet Metal - Wall Flashings - Q1 8 mRoofing (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM ELEVATIONS54 - 08800 Glass & Glazing - Exterior Wall (Glazing) 3606 - Q1 8 m ; Q2 28 m ²55 - 04100 Masonry - Brick Venner 3606 - Q1 6 m ; Q2 21 m ²Elevations (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 8,3564,211FOUNDATIONS32 - 03100 Concrete Work - Wall Footing - 450x250 - Q1 13 m ; Q2 7 m ² ; Q3 2 m ³33 - 03100 Concrete Work - Foundation Wall - 200x1200 - Q1 7 m ; Q2 17 m ² ; Q3 2 m ³34 - 03100 Concrete Work - Foundation Wall - 200x1800 - Q1 6 m ; Q2 22 m ² ; Q3 2 m ³40 - 03100 Concrete Work - Column Footing 1200x1200x250 - Q1 6 EA ; Q2 7 m ² ; Q3 2 m ³41 - 03100 Concrete Work - Piers - 400x400x1200 - Q1 6 EA ; Q2 12 m ² ; Q3 1 m ³Foundations (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM SLAB ON GRADE31 - 03100 Concrete Work - Slab on Grade - 150mm - Q1 133 m ² ; Q2 52 m ; Q3 20 m ³36 - 02315 Building Backfill - Backfill to u/s of SOG 600mm - Q1 110 m ² ; Q2 66 m ³Slab on Grade (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 604STRUCTURAL NEW / REWORK42 - 05110 Structural Steel - Steel Column 35kg/m - 4000 high - Q1 6 EA ; Q2 12 m ² ; Q3 1 m ³43 - 05110 Structural Steel - Beams 49kg/m - Q1 21 m ; Q2 6 EA44 - 05110 Structural Steel - OWSJ's 15kg/m - Q1 29 m ; Q2 13 EA45 - 05300 Metal Decking - Roof Deck - Q1 20 m ²46 - 06100 Rough Carpentry - Re-Framing Existing Sloped Roof - Q1 116 m ²Roof - Structural (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 7456,105SITE WORKS57 - 02775 Sidewalks - Concrete Sidewalk - Q1 46 m ²58 - 02775 Sidewalks - Concrete Sidewalk (Ramp) - Q1 13 m ²59 - 02775 Sidewalks - Concrete Sidewalk (Stairs) - Q1 3 m ²60 - 02775 Sidewalks - Ramp Retaining Wall w/ Railing on top - Q1 17 m61 - 02775 Sidewalks - Planter Wall - Q1 27 m62 - 02775 Sidewalks - Concrete Sidewalk (Stairs at Entrance) - Q1 3 m ²63 - 08800 Glass & Glazing - Glazed Railings - Q1 11 m74 - 02775 Sidewalks - Concrete Sidewalk (City) - Q1 36 m ²Site Works (21% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 9,27116,2936,77114,625RESTORATION3 - 02025 Building Demolition - Rmv Door - Q1 1 EA8 - 02025 Building Demolition - Rmv Windows - Q1 2 EA64 - 04 43 00 Stone Masonary - Re-Pointing of Existing Rubble Fdn Walls - 1500 dp - Q1 55 m ; Q2 83 m ²65 - 04 43 00 Stone Masonary - Restoration of Existing Stone - Q1 183 m ²66 - 07 70 00 Roof/Wall Specialties - Re-Shingle or New Slat - Q1 215 m ²67 - 07 70 00 Roof/Wall Specialties - Eavestrough Replacement - Q1 33 m68 - (unassigned) - Heritage Windows (Leave in Place) - Q1 14 m ²Restoration (30% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM 7,5461,3775,045Victoria Hall - Cross Section Markup.pdf (64% of Scale); Takeoff in Active Area: All Areas; Victoria Hall Aurora - SD; OST Projects; 2/23/2026 01:24 PM