Building Extension Contractors in Cape Town
Building Extensions in Cape Town
68 Projects Building Co designs and builds home extensions in Cape Town, from single room additions to second storeys, garage conversions, basements, and open-plan living spaces.
Get an Extension Quote
More Space Without Moving
Extend Your Home Instead of Buying a New One
Growing families, home offices, and changing needs often mean you need more space, not a new address. A well-planned extension adds room, comfort, and value while letting you stay in the home and neighbourhood you already know.
We build extensions that match your existing home, from the structure and roofline to the finishes, so the new space feels like it always belonged there.
Extension Services
Room Additions, Second Storeys, and Garage Conversions
We build a full range of home extensions, tailored to your property, budget, and the way you want to use the extra space.
Room Additions
Extra bedrooms, home offices, studies, and living spaces added to your existing home footprint.
Second Storey Additions
Building up to add bedrooms, bathrooms, or a full upper level without losing garden space.
Kitchen Extensions
Larger, open-plan kitchens with better flow, more storage, and improved connection to living areas.
Living Area Extensions
Open-plan lounges, dining rooms, and family spaces that make everyday living more comfortable.
Garage Conversions
Turning underused garages into flats, offices, bedrooms, or income-generating rental units.
Basements
Basement excavations and conversions that add rooms, storage, cellars, or garaging below your home.
Granny Flats & Cottages
Self-contained additions for family, guests, or rental income, built to work with your main home.
Braai Rooms & Patios
Enclosed entertainment areas, covered patios, and indoor-outdoor spaces built for Cape Town living.
Structural Alterations
Removing walls, opening up spaces, and reworking layouts with the right structural support.
Garage Conversions
Turn Unused Space Into Rooms That Work
A garage conversion is one of the most cost-effective ways to add usable space to your home. We convert garages into bedrooms, home offices, flats, and rental units, handling the walls, windows, flooring, plumbing, and electrical work to a proper finish.
- Experienced local building team
- Extensions matched to your existing home and budget
- Structural, roofing, plumbing, and electrical work coordinated under one team
- Clear scope and quote before work starts
- Guidance on plans, approvals, and building regulations
- Clean, respectful work on occupied homes
Extension Types
Extensions for Every Kind of Home
Every extension needs the right structure, roofline, and connection to the existing building. We work across common Cape Town home types and advise on the best way to add the space you need.
Ground floor extensions
Second storey additions
Garage conversions
Basement excavations and conversions
Granny flats and cottages
Kitchen and living extensions
Braai rooms and patios
How It Works
Our Extension Process
A clear process helps keep your extension on scope, on budget, and free of surprises.
Site Visit
We visit your home, discuss your ideas, and assess how the extension fits your existing building and space.
Design & Plans
We help develop a practical design and coordinate the drawings and approvals your project needs.
Detailed Quote
You receive a clear quote covering labour, materials, structural work, and finishing requirements.
Construction
Our team builds the extension with attention to structure, weatherproofing, and finish details.
Handover
We complete the finishes, check the work, tidy the site, and hand over your finished space.
Cost Guide
Home Extension Costs in Cape Town
Extension costs depend on size, structure, finishes, access, and the condition of the existing building. We provide a site-specific quote before work begins.
Small Additions
From R150,000
Single room additions, small garage conversions, and compact extensions to existing homes.
Larger Extensions
R400,000 - R2,500,000
Multi-room extensions, second storey additions, and open-plan kitchen or living area builds.
Full Projects
Quoted on site
Costs vary by size, structure, finishes, access, and the condition of the existing building.
Plans & Approvals
Getting Your Extension Approved
Most home extensions require approved building plans and must meet local building regulations. We guide you through what your project needs, coordinate with draughtspeople and engineers where required, and help keep the approval process moving so your build can start without unnecessary delays.
Frequently Asked Extension Questions
Key questions for Cape Town homeowners planning an extension — covering second storeys, garage conversions, plans, approvals, costs, and timelines.
Do you build second storey additions in Cape Town?
Yes. We add second storeys where the existing structure allows, coordinating the structural design, roofing, and finishes so the new level works with the home below.
Can you convert my garage into a flat or office?
Yes. Garage conversions are one of the most cost-effective ways to add usable space or a rental unit. We handle the walls, windows, flooring, plumbing, and electrical work needed.
Do you build basements in Cape Town?
Yes. We handle basement excavations and conversions, from extra rooms and storage to wine cellars and below-ground garaging, managing the excavation, waterproofing, structural support, and finishes needed for a dry, usable space.
Do I need approved plans for a building extension?
Most extensions require approved plans and must meet building regulations. We guide you through what your project needs and coordinate with draughtspeople and the local authority.
How much does a home extension cost in Cape Town?
Costs depend on size, structure, finishes, and access. Small additions can start from around R120,000, while larger extensions are quoted after a site visit.
Can we stay in the house while you build?
In most cases, yes. We plan the work to limit disruption, keep the site tidy, and protect the occupied parts of your home wherever possible.
How long does a building extension take?
Timelines depend on the size and complexity of the project. A small addition may take a few weeks, while a large extension or second storey can take several months.
Do you handle the whole project, including finishes?
Yes. We manage the full build, from foundations and structure through to roofing, plumbing, electrical, plastering, and final finishes.
Still have questions? We're here to help!
Contact UsPlanning a Home Extension in Cape Town?
Contact 68 Projects Building Co for a site visit, design guidance, and a clear quote for your home extension.
Areas We Service
Based in Cape Town, we provide renovations, structural repairs, waterproofing and property maintenance across the Southern Suburbs, the Northern Suburbs and surrounding areas. If your suburb isn't listed below, get in touch — chances are we cover it too.
- Airport Industria
- Bakoven
- Bantry Bay
- Bellville
- Bergvliet
- Bishopscourt
- Bloubergstrand
- Brackenfell
- Capricorn Park Industria
- Camps Bay
- Century City
- City Bowl
- Claremont
- Clifton
- Clovelly
- Constantia
- Diep River
- Durbanville
- Edgemead
- Epping Industria
- Fish Hoek
- Fresnaye
- Gardens
- Goodwood
- Green Point
- Higgovale
- Hout Bay
- Kenilworth
- Kirstenhof
- Llandudno
- Meadowridge
- Milnerton
- Montague Gardens Industria
- Mouille Point
- Mowbray
- Muizenberg
- Newlands
- Observatory
- Oranjezicht
- Paarden Eiland
- Panorama
- Pinelands
- Plattekloof
- Plumstead
- Rondebosch
- Rosebank
- Salt River
- Sea Point
- Simonstown
- Southfield
- Sunset Beach
- Table View
- Tamboerskloof
- Tokai
- V & A Waterfront
- Vredehoek
- Welgemoed
- Woodstock
- Wynberg
Not sure if we cover your area? Reach out for a free site visit and quotation.
Request a Quote