Corner Terrace or Semi-D? The Label Is the Least Interesting Part
Suppose a corner terrace is asking S$6 million and a semi-detached house nearby is asking S$5.5 million. Is the semi-D automatically the bargain?
No. Those are deliberately round, hypothetical numbers, but they expose a very real mistake: treating the housing label as a valuation shortcut.
A landed home is a bundle of land, planning rights, an existing structure and hidden liabilities. The better bundle wins.
The 2 labels overlap more than you think
A corner terrace is the end unit in a terrace row. A semi-D is one half of a pair, joined to its neighbour along a party wall.
That distinction matters, but it doesn’t tell you how good the actual property is. For a Type I corner terrace and a side-to-side semi-D, URA currently applies the same basic minimum plot size and width: 200 sqm and 8 m.
It also shows the same basic front, side and rear setback pattern for the usual Category 3 to 5 road situation. So a corner terrace and semi-D can begin from surprisingly similar planning geometry, then diverge because of the street, plot shape, house and paperwork.
Compare 4 ledgers
1. The land you can really use
Start with frontage, depth, shape, level and access. URA measures plot size and width on a net basis, excluding land that must be set aside for Road Reserve or Drainage Reserve.
An advertised 3,000 sq ft plot can be a lovely rectangle or a narrow wedge with an awkward driveway. Land area alone hides too much.
2. The house you can legally use today
Count the layout, approved built-up space and condition of the structure, not the marble and mood lighting. Roofs, waterproofing, drainage, electrical capacity, plumbing and signs of movement have a nasty habit of becoming the buyer’s problem.
And “renovated” doesn’t mean compliant. BCA advises buyers of existing properties to engage a competent person to inspect for unauthorised works and compare the house against its approved plans.
3. The liabilities attached to the site
Check the road category, road and drainage proposals, platform level, common drains, sewers, slopes and retaining walls. PUB says its plans still need site verification by the Qualified Person because not every drain or connection is shown.
Extra land beside a drain is still land. It may simply be land with homework.
4. The options you retain
Can the house be repaired lightly, altered substantially or rebuilt into something useful? That answer depends on the actual planning envelope, street-block controls, approved structure and neighbouring context.
“Can rebuild 3.5 storeys” is not due diligence. It is a sentence that should make you call an architect.
A corner can be an advantage or a tax
The exposed side of a corner terrace can give you better daylight, cross-ventilation, garden space and privacy from one neighbour. A regular plot on a quiet street can feel remarkably close to semi-D living, especially when the existing house is already good.
But an extra road edge can also mean traffic, headlights, noise, more boundary to maintain and less buildable space than expected. URA notes that road buffers are assessed from road reserve lines, including sites with more than one road frontage, so the apparent “open side” isn’t automatically future indoor space.
The side strip deserves a job. If it cannot improve daily life, parking or a credible future design, don’t pay a heroic premium for grass you will mostly hire someone to cut.
A semi-D must earn its premium
A good semi-D should give you something tangible: a wider or better-shaped plot, comfortable side clearance, stronger privacy, easier parking, a useful existing house or a more credible redevelopment path.
The name alone provides none of these. A narrow, low-lying or irregular semi-D with a tired structure and messy approvals can be a much bigger project than a sound corner terrace.
Title matters too. Have the conveyancing lawyer establish the exact lot, tenure and registered interests, then check the relevant road and drainage information instead of treating the brochure boundary as gospel. URA’s legal requisition guidance specifically notes that road and drainage proposals require separate plans.
House condition depends on your strategy
There isn’t one correct weight for renovation because buyers are doing different things.
Moving in: Condition, layout and approval status matter enormously. A usable house can save rent, financing carry, consultant time and a couple of years arguing over tiles.
Major A&A: The valuable part is the lawful structure you can retain. Pretty finishes are secondary if the frame, envelope or approved plans don’t support what you want to do.
Rebuilding: The kitchen is nearly irrelevant. Net plot geometry, access, platform level, planning controls and site liabilities take over the decision.
This sounds obvious. Somehow it isn’t.
Make the S$500,000 comparison properly
The semi-D in our hypothetical starts S$500,000 cheaper. That gap means nothing until both properties are brought to the same outcome.
For each house, add:
- Purchase price, stamp duties and legal costs
- Necessary repairs or construction
- Consultants, approvals and contingency
- Interest and temporary accommodation during the works
- Time before the family can actually use the house
- Ongoing maintenance created by the design and site
Then subtract the value of any lawful, useful structure you can retain. Our earlier landed redevelopment cost breakdown explains why a cheap old house can become an expensive project rather quickly.
My comparison order would be:
- Street, location and tenure
- Net plot geometry and access
- Approved house and physical condition
- Road, drainage, slope and title constraints
- All-in cost, time and future options
- Housing label
The badge is marketing. The constraints are the property.
Planning controls and site conditions change. Check current URA, BCA, PUB and title information, and obtain advice from the relevant Qualified Person and conveyancing lawyer before buying or planning works.
