Checked 23 September 2026. At a dual-key viewing, walk through the home as two households. Start at the lift or corridor, follow each route inside, and work out what each occupier would need to share. A second lock is only one part of living separately.
This checklist is for inspecting a completed private condo with adjoining living sections. It does not certify a specific unit’s construction, approved use or rental eligibility. For the budget, tax and ownership decision, read our separate dual-key versus conventional condo comparison.
Obtain the plan before judging the layout
Ask for the approved plan and identify which doors, partitions and fittings belong to it. CEA’s completed-property buyer checklist recommends checking approved use and unauthorised alterations; it also points buyers towards competent professional inspection when needed. A seller’s furniture drawing cannot establish building approval.
Mark the studio, main section and shared space on your copy. Put your own furniture dimensions alongside the room measurements. Avoid treating the advertised total area as the floor space available to the main household. Our condo floor-plan guide helps with that first pass.
Test the entrance as both occupants
With the seller’s permission, stand in each entrance while another member of your household uses the adjoining section. Check sightlines into bedrooms and living areas. Locate shoe storage, delivery space and door swings. Ask how keys and access cards are allocated and whether any route depends on the other household opening a door.
Walk the route you would use carrying groceries, a pram or mobility equipment. If a parent may need care, consider how you would reach them at night. Agree how emergency access would work without making an unsupported assumption about altering locks or common property.
Check sound and services
| Check | Practical question |
|---|---|
| Sound | Can you hear normal conversation, a television or doors closing through the separating wall or lobby? A brief viewing cannot establish overnight noise. |
| Cooking | Where do cooking smells travel? Check the actual ventilation and permitted fittings; do not assume a kitchenette supports the meals you usually cook. |
| Laundry | Where are the washer, dryer and drying space? Can either household use them without entering the other’s private area? |
| Utilities | Where are the meters, switches and shut-off points? Which services are shared, and how would charges and maintenance access be agreed? |
| Internet and work | Where could each occupier place a router and desk? Test reception where permission and access allow, rather than assuming the listing’s coverage claim. |
| Storage | Where will suitcases, cleaning equipment and spare bedding go once both sections are occupied? |
Record what you observed, what the seller said and what still needs evidence in separate notes. “Seller says separately metered” should remain unverified until you have checked the relevant arrangement. If a service is shared, discuss billing and access before a tenancy is signed.
Try three ordinary days
A workday: place two people on calls in their intended rooms. Think about breakfast, laundry and deliveries happening at the same time. You are checking a routine, not measuring formal acoustic performance.
A family visit: work out where guests would sit and which bathroom they would use. Would accessing the main dining table require walking through someone else’s sleeping area? Could an older relative manage the route comfortably?
A change of plans: imagine the studio is no longer rented, a parent moves in or a child needs a separate room. Decide whether the existing layout still serves you. Do not assume walls can be removed or the sections can be combined without checking permissions and obtaining a proper quotation.
Ask for evidence that survives the viewing
- A plan and a clear explanation of any changes from the approved arrangement.
- A written inventory of fittings included in the sale, identifying any items owned by an existing tenant.
- Relevant MCST information on access, moving, renovation and tenant registration.
- If tenanted, documents your lawyer needs to assess possession, deposits and obligations at purchase.
- A list of unresolved condition issues for a suitably qualified professional to inspect.
For a proposed letting, check URA’s current private residential rental rules before relying on income. Separate doors do not establish a separate occupancy allowance or permission for short stays. This checklist also does not establish any executive condominium’s HDB eligibility or rental position.
Your viewing notes should end with a decision: acceptable as seen, acceptable only after a specific point is verified, or unsuitable for your routine. A useful reason to walk away might be that the main section cannot fit your dining table without blocking access. That is more informative than a generic score for “flexibility”.
General viewing guidance, not a professional inspection or legal opinion. Correction on 23 September 2026: replaced unsupported valuation and rental-return claims, tax and financing shortcuts, and a purported typical layout graphic with a practical inspection checklist. Featured photograph: Robertson Quay in 2011, Bryanmackinnon, source, CC BY-SA 3.0. It provides residential-area context, not evidence of the layout or condition of a dual-key home.
