A dual-key unit is one title split into two lockable spaces. Which One Heritage layouts convert, what each one gives you, and who the split actually suits.
Summary
A dual-key unit is one unit on a single title, divided into two separately lockable spaces reached through one shared entrance.
At One Heritage the split is a brochure conversion option on five layouts — B1, B2, C1, C1b and D2 — not the standard delivered layout.
167 of the 287 units are one of those five types.
The convertible types run 506–527 sq ft. B1 converts to a 3-bedroom, 2-bath split; B2, C1, C1b and D2 each convert to 2 bedrooms, 2 baths.
Owners use the split three ways: live in one side and let the other, let both sides, or house a parent or adult child next door with their own door.
The other six layouts — A1, A1a, A1b, A2, C1a and the 840 sq ft D1a — are single-key and do not convert.
Every unit comes with one parking bay — one bay for the whole unit, not one per key — and all five convertible types are delivered half furnished.
One Heritage is a freehold serviced apartment on commercial title in the JB city core: 287 units, from RM600,000.
What dual key actually means
A dual-key unit is one property, not two. You buy a single unit on one title, and inside it the space is divided into two parts that each lock on their own, reached through one shared entrance foyer. One door off the corridor, then two doors inside — yours and the other side's.
Because it is one title, it stays one purchase, one loan and one set of outgoings. What splits is how you use the space, not the ownership. That is the whole appeal: the flexibility of two addresses with the paperwork of one.
The three ways owners use it
The split earns its keep in three ways, and the layout does not force you to pick one for good — you can change how you use it as your life does.
Live in one, let the other. Occupy the larger side and rent the smaller one out, so a tenant helps carry the monthly repayment.
Let both sides. Run two tenancies from a single unit, which widens the pool of tenants a small floor plate can reach.
House family separately. A parent or an adult child lives alongside you with their own entrance and bathroom — close at hand, but not on top of each other.
Which One Heritage types convert
Five of the eleven filed layouts carry the dual-key conversion: B1, B2, C1, C1b and D2. Between them that is 167 of the 287 units — just under six in ten, so the split is a mainstream choice here rather than a rare one. It is important to be exact here — this is a conversion option drawn in the brochure, not the layout every unit is delivered with, and it is not offered on the other six types. If a two-household plan is the reason you are buying, the type matters as much as the floor.
What the conversion gives you, type by type
All five start as a one-bedroom, two-bath plan and open up into a lockable split. On the plans below, the red lines are the added partition and the door that create the second key.
B1 — 517 sq ft, facing Jalan Wong Ah Fook
Bed 1 and its bathroom on one side; Bed 2, Bed 3, the pantry and Bath 2 on the other.
Converts to a 3-bedroom, 2-bath split — the most rooms of any convertible type, and the layout offered on the largest number of units.
B2 — 517 sq ft, facing Jalan Wong Ah Fook
The same footprint as B1, divided into two sides instead of three rooms.
Converts to 2 bedrooms, 2 baths.
C1 — 506 sq ft, facing Public Bank Tower
C1 sits on the higher floors, L23–41.
Converts to 2 bedrooms, 2 baths.
C1b — 506 sq ft, facing Public Bank Tower
C1b's filed plan, shown here in the original layout — it is C1's plan on the lower band, and the split follows C1 above.
The same 506 sq ft layout as C1, on the lower band (L14–22). Converts to 2 bedrooms, 2 baths.
D2 — 527 sq ft, facing Jalan Trus
D2 is the deeper of the convertible plans, and the second most numerous.
Converts to 2 bedrooms, 2 baths, and is offered on the second-largest number of units.
What to check before you count on it
The split is useful, but it comes with things to confirm rather than assume:
One parking bay, however many keys. The allocation is one bay per unit, and converting to dual key does not add a second. Let both sides and two households share a single bay — on a city-centre site where street parking is scarce, that shapes who will rent the second key and what they will pay.
Half furnished, on both sides. All five convertible types are two-bathroom layouts, and the two-bathroom types are delivered half furnished. Budget for finishing both halves before either can be let.
It is an option, not the delivered layout. The conversion is shown in the brochure; the unit is not handed over split by default. If you are buying for two households, confirm the conversion is built into your unit and get it in writing.
The title is commercial. One Heritage is a serviced apartment on commercial title. What you may do with a let unit — short-stay letting in particular — depends on the title class and the building's own management rules, so confirm those with the sales team before you build a letting model on them.
Run the numbers yourself. No yield or rent is guaranteed here. Put your own figures through the installment calculator before you decide the split pays for itself.
Where it does not help — the single-key types
The other six layouts stay as one continuous home. A1, A1a and A1b (570, 570 and 506 sq ft, facing the Straits of Johor), A2 (409 sq ft, the RM600,000 entry type) and C1a (441 sq ft, facing Public Bank Tower) are single-key — better for one person or a couple who want a single open home than for a landlord splitting a floor.
The 840 sq ft D1a sits apart from both groups: it is the only type designed as a genuine three-bedroom home from the outset, aimed at a family rather than a split, and it is priced at RM1,300,000. If a family is the plan, D1a is the layout to look at, not a converted key.
