SCHEME â„– 6: SECOND FLOOR ADDITION DESIGN B
"The More Affordable Option"
OVERALL DESIGN SOLUTION
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Before: 2 bed, 1 bath bungalow
After: 4 bed, 2 bath bungalow w/ remodeled kitchen
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Have you decided a full second floor addition is the best solution for your growing family? We can help you protect the value of your largest investment with this sensible approach, which respects the original design of the existing building and streetscape, complete with 4 bedrooms (2 upstairs, 2 downstairs), 2 bathrooms, an office and plenty of attic storage. Also included in this design scheme is a remodeled kitchen within its original footprint, with modern amenities for your family.
View details of the existing bungalow
Exterior Alterations ​
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Meet CBA Design Guidelines to maintain your membership:
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Construct addition to be set back a minimum of 20 feet from the front edge of building to minimize the impact on the building and streetscape
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Build addition that is compatible to the original building in material, style and proportions
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Use fiber-cement siding with trim board where it meets brick
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Build addition with a similar roof pitch and height as the original building
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Gable roof form above hip roof (more affordable and simple to frame than a matching hip roof)
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Asphalt shingles
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Match window openings, trim, eaves and other details as closely as possible to the original building
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Add aluminum gutters and downspout
Exterior Plans
 Front |  Rear |  East |
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 West |  Rear (Aerial) |
Exterior 3D Renderings
Structural Reinforcement
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Typically, the floor structure of an existing attic is actually a ceiling joist. To make the attic a livable space, the existing ceiling joists usually will not meet the Chicago Building Code requirements for a floor structure and will have to be reinforced to support the new use of space and new load.
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Possible reinforcement of existing beams and columns in basement to support added load​​
Interior Alterations ​
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Second floor (footprint altered)
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Add set-back addition to provide more usable second floor space, including:
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1 master bedroom​ w/ large closet
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1 bedroom w/ closet
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1 full bathroom (accessible from master bedroom and hallway)
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1 office
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8' ceiling height ​
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Front attic storage area (accessible from hallway)
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Bathroom above first floor bathroom to share plumbing piping
New staircase to second floor and basement
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Change access from kitchen to dining room
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Widen stairs to meet Chicago Building Code requirements
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First floor
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Remodel kitchen within original footprint:
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Add counter space with stair access to attic eliminated
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New cabinets, appliances and modern amenities
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Demo chimney​
Basement to remain unfinished
System Upgrades
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Heating
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​Remove chimney; add new high efficiency boiler and hot water heater directly vented to outside
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Add hot water radiator or separate HVAC system for second floor
Plumbing & Electric
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Possible increase, see System Upgrades Design
Interior Plans
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Interior Renderings
Project Cost Estimate​
Second Floor Addition
Total Square Footage: 25' x 24.875' = 622ft² / Cost per Square Foot: $230-285
Includes all exterior alterations, added structural support, 1 new master bedroom w/ closet, 1 new bedroom w/ closet, 1 office, 1 full bathroom and new HVAC system
$143-177k
Staircases
New staircases to second floor and basement
$10-16k
Kitchen
Remodel kitchen to provide modern amenities
$8-12k
Plumbing
Possible increase in plumbing service w/ new, larger water main
$15k
Electrical
Possible increase in electrical service
$2.5k
Full Project Download
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Take this to your contractor, architect, or design-build team!
