James P.
Ashgrove, QLD
Added master suite + 2 bedrooms for $285K in Ashgrove. Project took 7 months. The Wombat™ connected us with 3 great local builders - saved $40K by comparing quotes. Added $380K to home value!
Full Second Storey Addition
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$168,000-$448,000
Ashgrove Price Range
Average extension cost
60-80%
ROI in Ashgrove
Property value added
4-7 Months
Typical Timeline
Including approvals
15-25%
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Second Storey Extension Costs Ashgrove 2026
Complete pricing guide for all extension types and budgets
3 min read
Quick Answer
Second storey extensions on sloping Ashgrove blocks typically cost $280,000-$616,000 due to specialized engineering requirements. Sloping sites often require additional foundation work, retaining walls, and split-level designs. Benefits include potential walk-out basements, elevated views, and natural light maximization. Budget 15-25% extra for site-specific structural solutions.
Updated January 2026
24,500+ Australians served
Ashgrove, 4060
1
Geotechnical Reports: Essential for sloping Ashgrove blocks - budget $2,000-$5,000 for soil testing and site classification
2
Retaining Walls: May add $15,000-$50,000 depending on height and engineering requirements for slope stabilization
3
Split-Level Designs: Can reduce excavation costs and create natural separation between living zones while following terrain
4
Walk-Out Basements: Possible on sloping sites, adding valuable garage, storage, or living space below the extension
5
Elevated Views: From upper levels on sloping Ashgrove blocks can significantly increase property value and appeal
6
Drainage Solutions: Critical - stormwater management, subsoil drains, and appropriate grading prevent future issues
Price Comparison
Second Storey Extension Costs: Ashgrove Component Breakdown
Comprehensive pricing for all extension components
Component-by-Component Pricing Guide
| Component | Budget Range | Premium Range |
|---|---|---|
| Structural Engineering | $3,360-$6,720 | $8,960-$16,800 |
| Foundation Reinforcement | $16,800-$33,600 | $39,200-$67,200 |
| Staircase Installation | $8,960-$16,800 | $22,400-$44,800 |
| DA & Approvals | $5,600-$11,200 | $13,440-$22,400 |
*Prices include all materials, labour, and installation for Ashgrove. Costs vary by site complexity, material selections, and local market conditions. Timeline: 16-28 weeks from DA approval to completion.
Ashgrove Extension Specialists
Why Add a Second Storey to Your Ashgrove Home?
Looking for second-storey extension builders near you in Ashgrove? The Wombat™ connects Ashgrove residents with licensed builders throughout the Greater Brisbane region.
Sloping Block Extensions in Ashgrove: Sloping blocks create unique opportunities for second-storey extensions with walk-out basement access. Challenging terrain requires specialised engineering for foundations and retaining walls, but rewards with spectacular elevated views. Projects often integrate the extension into the slope, creating split-level living with garage/storage below and premium living spaces above. Complex site access may require crane lifts for materials. Design maximizes view corridors while managing drainage and erosion. Our Ashgrove builders provide specialized engineering for sloping terrain second-storey extensions.
All builders in our Ashgrove network are fully licensed, understand Brisbane council regulations, and provide structural engineering coordination.
2026 Pricing Guide
How Much Does a Second Storey Extension Cost in Ashgrove?
Complete 2026 pricing guide for all extension types and budgets in Ashgrove
Single Room Addition
Entry LevelPerfect for adding a master bedroom or guest suite with ensuite bathroom
30-50m² Ensuite Walk-in robe
$90K-$168K
3-4 months
MOST POPULAR
Two Room Addition
Ideal for growing families needing extra bedrooms, bathroom, and optional balcony
60-80m² 2 bedrooms Bathroom Optional balcony
$168K-$280K
4-6 months
Large Second Storey
PremiumComprehensive addition with master suite, multiple rooms, 2 bathrooms, and balcony
90-120m² 3+ rooms 2 bathrooms Walk-in robe
$280K-$448K
6-9 months
Full Second Storey
ULTIMATEComplete second floor that doubles your home's living space with 4-5 bedrooms, living retreat, and terrace
Doubles home 4-5 bedrooms Living retreat Terrace
$448K-$896K+
9-12+ months
Calculator
Second Storey Extension Cost Calculator Ashgrove
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Structural Stairs Plumbing Electrical Roofing Finishes
Estimated Cost
$246,400 - $302,400
Prices for Ashgrove area
This is an estimate only
Actual costs vary based on your specific requirements, site conditions, and chosen finishes
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Decision Guide
Second Storey Extension vs Knock-Down Rebuild: Which is Better for Ashgrove?
Quick guide to determine the best approach for your Ashgrove property
Choose Extension
Sound structure
Strong foundation
Love your location
Stay during build
Cost <60% rebuild
Single room to full second storey additions
Choose Rebuild
Major structural issues
Weak foundation
Want modern efficiency
Layout unusable
Cost >75% rebuild
Complete demolition and new two-storey build
Get a structural assessment first ($2K-$6K)
Reveals your home's capacity and required reinforcement - can change the extension vs rebuild calculation
Ashgrove Extension Process
What's Included in Your Ashgrove Second Storey Extension
Every phase handled by licensed Ashgrove professionals from start to finish
Design & Planning
Phase 1Architectural design with 3D renders, structural engineering, and council DA preparation.
3D renders Engineering DA submission
Structural Work
Phase 2Foundation reinforcement, steel beams, and wall reinforcement for upper level support.
Underpinning Steel beams Reinforcement
Framing & Roof
Phase 3Upper level wall framing, new roof structure, and staircase construction.
Wall framing New roof Staircase
Framing & Roofing
Phase 4Timber or steel framing, new roof installation, and weatherproofing.
Wall framing New roof Weatherproofing
Services & Insulation
Phase 5Electrical, plumbing rough-in, HVAC ducting, and insulation installation.
Electrical Plumbing HVAC
Fit-Out & Finishes
Phase 6Plastering, painting, flooring, bathroom tiling, and built-in wardrobes.
Plastering Flooring Bathrooms
Fixtures & Fittings
Phase 7Lighting, bathroom fixtures, door handles, and final hardware installation.
Lighting Tapware Hardware
Completion & Handover
CompleteFinal inspections, occupation certificate, clean-up, and project handover with warranty.
Final inspection OC certificate 6yr warranty
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Local Ashgrove Information
Essential details about services in your area
Suburb Details
Suburb Ashgrove
Postcode 4060
City Brisbane
State Queensland (QLD)
Council & Compliance
Local Council Regulation:
Building approval needed for structural renovations
All work in Ashgrove must comply with Brisbane council regulations and Queensland building codes. Our network of professionals are familiar with local requirements.
Design Trends
Popular Second Storey Extension Styles in Ashgrove
Trending extension designs across Ashgrove homes
Master Retreat
Most PopularPrivate upstairs sanctuary with large ensuite, walk-in robe, and optional balcony
Private ensuite Walk-in robe Balcony
Kids Zone
Family FavouriteMultiple bedrooms upstairs with shared bathroom and rumpus/study area
3-4 bedrooms Shared bathroom Study nook
Complete Upper Level
Premium ChoiceFull second floor with multiple bedrooms, living areas, and outdoor terraces
4+ bedrooms Living retreat Large terrace
Contemporary Design
Modern AppealModern architectural design with flat roof, floor-to-ceiling windows, and smart home features
Flat roof Large windows Smart home
Project Timeline
Second Storey Extension Timeline in Ashgrove
Complete construction timeline - what to expect at each stage of your Ashgrove build
1 2-4 months
Planning & Design
- • Architect plans & DA approval
- • Structural engineer assessment
- • Finalize contractor & materials
2 2-4 weeks
Structural Work
- • Foundation underpinning
- • Steel beam installation
- • Wall reinforcement
3 3-6 weeks
Framing & Roof
- • Remove existing roof
- • Frame walls & new roof
- • Staircase construction
4 2-3 weeks
Lock-Up Stage
- • Windows & external doors
- • Roof tiles/cladding
- • External weatherproofing
5 3-4 weeks
Services Installation
- • Plumbing & electrical
- • HVAC ducting
- • Insulation & inspections
6 4-8 weeks
Fit-Out & Finishes
- • Plasterboard & painting
- • Bathroom waterproofing
- • Flooring installation
7 1-2 weeks
Completion
- • Final fixtures & fittings
- • Inspections & certificates
- • Project handover
TOTAL TIMELINE
6-12+ Months
Varies by project size & council approval
Premium Materials
Extension Materials & Finishes in Ashgrove
Quality materials and expert craftsmanship for your second storey
Structural Systems
Steel frame or timber construction, engineered to Australian standards with options for lightweight cladding or full brick veneer.
Windows & Doors
Double-glazed aluminium or timber windows, sliding doors to balconies, and stacker doors for seamless indoor-outdoor flow.
Interior Finishes
Premium plasterboard, timber or hybrid flooring, quality carpets, custom cabinetry, and designer lighting packages.
Staircase Options
Timber, steel, or floating staircases with glass or timber balustrades. Custom designs to match your home's character.
Verified Ashgrove Professionals
Why Choose Local Ashgrove Extension Specialists?
Trusted local builders with proven track records in your area
Local Knowledge
Understand Ashgrove housing styles and council requirements
Licensed & Insured
QLD licensed builders with full insurance coverage
Engineering Expertise
Experienced with structural requirements for Ashgrove homes
Competitive Pricing
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Verified Reviews
What Ashgrove Customers Say about Second Storey Extension
Real second storey extension reviews from verified Ashgrove customers
5.0 out of 5
Based on 3 verified reviews
Second Storey Extension reviews in Ashgrove. 3 verified customer reviews with 5.0/5 average rating. Real experiences from local customers.
Lisa M.
Ashgrove, QLD
Single room master suite extension $165K in Ashgrove. Builder handled all engineering and Brisbane council DA approvals seamlessly. Living on-site was more manageable than expected.
Master Suite Addition
Robert K.
Ashgrove, QLD
2-room addition cost $210K including foundation reinforcement. Our Ashgrove builder handled everything professionally. Structural assessment showed we needed extra work but it was all included. No surprises!
Two Room Extension
5.0/5 Average Rating 3 Customer Reviews Wombat™ Verified Ashgrove Area Second Storey Extension
Expert Resources
Expert Second Storey Extension Guides for Ashgrove
Free guides from The Wombat™ to help you plan your Ashgrove second storey extension
Second Storey Extension Cost Guide 2026
Detailed pricing by size, location, and structural requirements
Read GuideSecond Storey vs Knockdown Rebuild
Which option is right for your home and budget?
Read GuideHow to Plan a Second Storey Addition
Step-by-step planning guide for your extension project
Read Guide10 Second Storey Mistakes to Avoid
Common errors that can cost you time and money
Read Guide Service Areas
Second Storey Extensions in Nearby Brisbane Suburbs
Our network of licensed second storey extension specialists services all suburbs across Brisbane
Fortitude Valley
4006
South Brisbane
4101
New Farm
4005
Paddington
4064
West End
4101
Chermside
4032
Indooroopilly
4068
Carindale
4152
Toowong
4066
Ascot
4007
Bulimba
4171
Coorparoo
4151
Don't see your suburb? Get a quote and we'll connect you with professionals in your area.
Add a Second Storey to Your Ashgrove Home: Double Your Living Space
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FAQ
Second Storey Extension FAQs for Ashgrove
Second storey extension costs in Ashgrove (4060) vary by scope: Single room additions (master bedroom with ensuite) $134,400-$201,600, standard extensions (2-3 bedrooms) $201,600-$313,600, full second storeys $313,600-$560,000+. Get free quotes from Ashgrove extension builders to compare.
Yes, all second storey extensions in Ashgrove (4060) require Development Application (DA) approval from Brisbane council. Requirements include architectural drawings, structural engineering plans, site analysis, and shadow diagrams. Some Ashgrove properties may qualify for Complying Development. Your builder handles all approvals.
Second storey extension timelines in Ashgrove: Planning & DA approval 2-4 months, single room additions 12-16 weeks construction, standard extensions 16-20 weeks, full second storeys 20-28 weeks. Most Ashgrove families can remain in their home during construction with proper dust barriers.
Most Ashgrove homes can support second storey extensions with proper engineering. A structural engineer will assess your existing foundation, soil conditions, and load requirements. Options include underpinning existing footings or steel beam reinforcement. Engineering assessment is included in your quotes.
Second storey extensions offer excellent value in Ashgrove. Benefits include: doubling living space without losing backyard, typically 60-80% ROI on property value, staying in your established Ashgrove neighbourhood, and ideal for blocks where ground-level extensions aren't possible. Quality extensions can return 80-100%+ of investment in premium Brisbane suburbs.
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Planning a Bigger Renovation in Ashgrove?
We can help with these complementary services to complete your Ashgrove dream home
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Whole-home transformation
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Second Storey
Need more space? Add a second storey to your home. Get quotes from structural engineers and builders.
Maximize living space
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Protect your home investment. Restore and extend the life of your roof with expert roofers.
Protect your investment
Extend roof lifespan
Licensed roofers
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Ready to add a second storey in Ashgrove?
Ready to add a second storey in Ashgrove?
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Last updated: February 2026
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Prices are estimates based on market research and may vary by location, project size, site conditions, and specialist. Always get multiple quotes for accurate pricing. Second storey extensions require building permits, engineering approval, and compliance with building codes.