Dunearn House: The Floor Plan Trap – Paying for Unusable Space

GFA Harmonisation Status — Dunearn House vs Comparables

Per the series rules, a full strata vs liveable psf floor plan comparison only applies when Dunearn House is the first or only harmonised project among the comparables. All key leasehold comparables in this corridor — The Reserve Residences, 8@BT, Leedon Green, Fourth Avenue Residences (post-2022 resale) — were either launched post-harmonisation or are being compared on a harmonised basis. A status table applies.

Harmonisation rules apply to development applications submitted to URA on or after 1 June 2023. Fourth Avenue Residences (launched 2019, TOP 2022) retains pre-harmonisation strata definitions. Resale psf comparisons between Fourth Avenue and Dunearn House require adjustment.

What GFA Harmonisation Actually Changed — and What It Didn't

Most buyers have heard of GFA harmonisation. Few understand exactly what changed, which means they apply it incorrectly when reading a floor plan. Here is the precise mechanics, because it determines how you read every Dunearn House layout.

The practical implication for Dunearn House buyers: when you see 530 sqft for a 2-bedroom, that figure excludes AC ledges and voids — but it still includes balcony area and internal wall sections. The liveable floor space (what you can actually furnish and use) will be the strata area minus balcony and wall fractions. For a typical 530 sqft 2BR, a 50–60 sqft balcony leaves approximately 470–480 sqft of internal floor space. At $3,000 psf, that internal space costs roughly $3,375–$3,450 psf effective. That is the number that matters for lifestyle planning.

Dunearn House Unit Mix — What You Are Choosing Between

Dunearn House offers 380 units across six configurations: 2BR, 2BR+Study, 3BR, 3BR+Study, 4BR, and 4BR Premium. Sizes run from 530 sqft to 1,380 sqft. The unit mix is weighted toward 2-bedroom formats at 46% of total units, with the remaining 54% in 3BR and 4BR configurations.

Unit mix percentages from developer marketing materials. Individual sqft ranges are estimates based on published project data — exact sizes will be confirmed in the official floor plan release. Percentages may not sum to 100% due to rounding.

Unit Type Analysis — Room by Room at $3,000 PSF

At $3,000 psf, the size of every room has a dollar value. A 10 sqft difference in bedroom dimensions is $30,000. Understanding what each unit type actually delivers — and whether the proportion of balcony, corridor, and bedroom space makes sense for the lifestyle the unit is supposed to serve — is the core of the floor plan analysis.

Unit sizes, quantum estimates, and internal area calculations are based on published project data and developer marketing materials as at June 2026. Exact floor plans and sizes will be confirmed at the VVIP preview. Balcony estimates are typical ranges for CCR developments of this type — actual balcony areas will vary by stack and unit type. These are illustrative figures for planning purposes only, not developer disclosures.

What the Brochure Won't Tell You About the Floor Plans

GFA harmonisation has made Dunearn House's floor plan numbers more honest than pre-2023 launches. But honesty in measurement does not mean every unit is equally liveable. Three things to check at the showflat that no brochure will flag for you.

1. The balcony proportion problem

Balconies remain part of strata area and are counted in the advertised psf under harmonised rules. At Dunearn House, estimated at ~$3,000 psf, a 60 sqft balcony on a 2BR unit represents $180,000 of your purchase price. That is not wrong — balconies have lifestyle value, especially in a low-rise development with greenery views. But if you are buying primarily for internal living space, that 60 sqft of balcony is $180,000 you are not spending on bedroom or kitchen area. For school-belt families who will use every square foot indoors, the balcony-to-internal ratio matters. For right-sizers downsizing from a landed property with a garden, the outdoor space is part of the point. Know which buyer you are before you model the psf.

2. The corridor and wet area tax

In any strata unit, corridors, bathrooms, kitchen, and structural walls absorb a percentage of the gross strata area. For a well-designed 1,000 sqft 3BR, the wet areas and corridors typically account for 180–220 sqft. That leaves 780–820 sqft of dry living and bedroom space. At $3,000 psf, those 200 sqft of wet areas and corridors cost $600,000 — unavoidable, but worth modelling. A poorly designed 1,000 sqft unit with oversized bathrooms and a meandering entry corridor will give you 700 sqft of usable dry space. A well-designed one will give you 820. The difference is $360,000 at $3,000 psf. At the showflat, measure the corridor width (should be min 900mm for comfortable movement) and the kitchen depth (min 2.1m for a working galley). These are the design quality signals that determine whether the developer's efficiency ratio works for how you actually live.

3. The 2BR trap for investors

At 46% of total units, the 2BR format at Dunearn House is the largest cohort — which is where most investors will look first. At ~530 sqft and ~$1.59M, the entry quantum is relatively accessible for a CCR address. But the 2BR investor at Dunearn House faces a specific floor plan challenge: at 530 sqft, you are selling a bedroom that is functionally usable for a couple but tight for a family. The D10/D11 rental market in 2026 skews toward expatriate families and professionals who are willing to pay $7,000–$8,000/month but want bedrooms large enough for a king bed and wardrobes. A 530 sqft 2BR with a master bedroom of less than 120 sqft and a common bedroom of less than 90 sqft will struggle to command top-of-range rents regardless of the address. The yield analysis is in Part 4: The Yield Reality — but the floor plan is where the yield question starts.

Reading Dunearn House Against Fourth Avenue Residences — A Fair Comparison

Fourth Avenue Residences is the most frequently cited D10 leasehold comparable for Dunearn House. But it launched in 2019 — four years before harmonisation. A direct psf comparison is misleading. Here is what a fair side-by-side looks like.

Fourth Avenue Residences launch and resale data from CBRE/ERA Research (2025). Dunearn House estimates based on developer marketing and analyst post-tender projections. AC ledge deduction is estimated at 35–40 sqft for a typical 2BR pre-harmonisation unit (industry benchmark: 4–5% of saleable area). Not a developer disclosure.

The honest read: Dunearn House's 2BR at ~530 sqft and ~$1.59M is not meaningfully cheaper than Fourth Avenue's 2BR at ~700 sqft and ~$1.61–1.73M in total quantum. The size difference is largely explained by measurement methodology, not by one project being physically smaller. What Dunearn House's harmonised sizing gives you is transparency — you know exactly what you own. What it does not give you is more space. The internal living area of a 530 sqft harmonised 2BR (approximately 475 sqft) is genuinely smaller than the internal living area of a 700 sqft pre-harmonised 2BR (approximately 610–640 sqft after adjustments). That 130–165 sqft internal gap is real, and at $3,000 psf it represents $390,000–$495,000 of living space you are trading away in exchange for a newer, better-located address. Whether that trade is worth it depends on your lifestyle — which is why the showflat walkthrough matters more than the psf comparison.

Side by Side — The Same 700 SQFT, Two Different Realities

The clearest way to see the harmonisation gap is to put two units of nearly identical advertised size next to each other — one pre-harmonisation, one harmonised — and show what each buyer actually walks away with. Below is a like-for-like illustration using Fourth Avenue Residences (pre-2023, D10, comparable corridor) against a Dunearn House unit scaled to match its advertised size.

*Dollar saved reflects the combined effect of more liveable area for the same advertised size, valued at Dunearn House's estimated $3,000 psf. Fourth Avenue figures use an estimated 70–80 sqft of combined AC ledge and void/bay window area, consistent with industry benchmarks of 4–5% AC ledge plus additional void allowance common in pre-2023 CCR launches (myexclusivecondo.com, 2024). This is an illustrative comparison scaled to equal advertised size — not a comparison of actual unit types, which differ in configuration between the two projects. Not a developer disclosure.

This is the real argument for harmonisation, stated plainly: for the same advertised sqft and the same psf, a harmonised unit at Dunearn House delivers more space you can actually stand in than a pre-2023 unit of identical advertised size. The flip side — covered earlier — is that Dunearn House's actual advertised sizes (530–1,380 sqft) are smaller in absolute terms than older projects' advertised sizes, because the inflation has been stripped out at the point of measurement, not added back as extra room. Both things are true at once. Harmonisation didn't shrink your living room. It stopped charging you for the air conditioner.

James's Position — Which Unit Type at Dunearn House Actually Works

The 2BR at 530 sqft works for one profile only: an investor renting to a couple or single professional with no long-term owner-occupier plan. If you are buying to live in, the 2BR will feel tight within two years of ownership. It is not a floor plan problem — it is a lifestyle calculation problem. CCR buyers at $1.59M entry often underestimate how much of that premium they are paying for address and future resale optionality rather than living space.

The 3BR at ~900–1,000 sqft is where Dunearn House's floor plan case is strongest. The school-belt buyer with one or two school-age children gets three usable bedrooms, enough kitchen space to cook properly, and a living area large enough for family use — all within a CCR address that the child's school catchment justifies. At ~$2.70–3.00M quantum for a 3BR, the entry is not cheap, but the lifestyle fit is real.

The 4BR Premium at 1,200–1,380 sqft is the most interesting unit for the right-sizer profile from this series — parents who have sold or downsized from a 4,000 sqft semi-detached and need a serious alternative. At 1,380 sqft (the larger 4BR Premium), the internal living space after balcony (~110 sqft) is approximately 1,270 sqft — genuinely usable for a couple with occasional children or grandchildren staying over. This is the unit type the landed belt right-sizer should model first. The strata vs yield analysis for the 4BR Premium is in Part 4.

The one unit type to approach with extra scrutiny: any stack facing Dunearn Road directly. A low-rise development (10–19 storeys) on a main arterial road in Singapore generates noise from floors 1–8 that is not resolved by double-glazing alone. The management council's future decisions about acoustic screening and landscaping buffers will matter — which is exactly why the first MCST at Dunearn House carries governance weight that most buyers are not pricing in. That is covered in Part 7: The Management Reality.

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