A&A Works, Reconstruction & Rebuilds in Seletar Hills

The Work That Comes Up in Seletar Hills

Rebuilds and substantial A&A on original houses, including basement additions where the soil and neighbouring structures allow.

What none of that tells you is what your plot allows. That is set property by property, and it is the first thing we establish — before any drawing, and before any number.

What Is Usually Holding Up a Seletar Hills House

A mature estate with a good proportion of original stock on regular plots. Original foundations were sized for the house that was built, not for the one owners now want on top of it — the load calculation is the honest starting point.

This matters more than most owners expect. A house built in the 1960s generally carries its load in the walls rather than in a frame, and sits on footings sized for the building that was drawn at the time — not for a second storey, a flat roof terrace, heavier stone finishes and a set of solar panels. So the question is never simply can we add this. It is whether the load has somewhere to go, and what it costs to give it somewhere.

For anything built before roughly 1990 we do a foundation review and a column and beam load calculation before we quote. Sometimes the answer is straightforward reinforcement. Sometimes it is that the strengthening needed to keep the existing structure costs more than rebuilding, and you are better off knowing that at the start than three months into a job. We would rather tell you at the quotation stage and lose the work than discover it after demolition, when your options have narrowed and your budget has not.

Getting Machinery and Materials Into Seletar Hills

Generally regular plots with reasonable room to work, which keeps conventional piling and conventional methods available. That tends to make basement additions worth assessing rather than dismissing.

Access is the constraint homeowners think about last and builders think about first. It decides which piling method is available to you, whether concrete arrives by pump or by barrow, where materials can be stacked without blocking a neighbour, and how long the whole job takes. Two identical designs on two plots a street apart can differ meaningfully in cost for no reason other than what can be driven in.

On a terrace plot with houses attached on both sides, the neighbours are part of the engineering. Party walls have to stay supported while you work against them, which means shoring, sequencing, and in some cases a condition survey of the adjoining properties before anything starts — worth doing anyway, because it records what was already cracked before you arrived. Where a neighbour has previously rebuilt with a basement, their structure is part of your excavation problem whether or not anyone mentions it.

What We Check on a Seletar Hills Property

1. Your plot's URA record. Zoning, the building envelope, setbacks from each boundary, and any control specific to your property — including Good Class Bungalow or conservation status where it applies. Sometimes this alone tells us an idea will not be approved.
2. The existing structure. For anything built before about 1990, a foundation review and load calculation. An older house was not designed for an added storey and today's finishes.
3. Neighbouring conditions. Party walls, how close the houses either side sit, and whether shoring or underpinning will be needed. This decides feasibility more often than the design does.
4. Site access. Whether machinery can physically reach the plot, and what has to be done differently if it cannot. On tighter roads this drives both method and cost.
5. What it means for you. A real number with line items, after the site visit and architect input — not a same-day guess with a decimal point on it.

How a Seletar Hills Project Actually Runs

Most of the frustration in landed building comes from owners being given a construction timeline when what they needed was the whole timeline. The building is the visible part. It is rarely the part that decides when you move back in.

1. Feasibility. We pull your plot's actual URA records and look at the existing structure. This is where an idea either survives or gets replaced by a better one, and it is the cheapest possible time for that to happen.
2. Design and engineering. An Architect develops the scheme; a Qualified Person does the structural design and signs for it. What comes back is sometimes not what you first pictured, because the envelope and the existing foundations both have a say.
3. Submissions and approvals. Typically two to four months before any physical work can start, and largely outside anyone's control once lodged. We build this into the programme at the beginning rather than presenting it later as a delay.
4. Structural works. Demolition, foundations or piling, then frame. This is the stage where unrecorded earlier alterations surface, which is why the condition survey and the foundation review earlier are worth what they cost.
5. Building and finishing. Envelope, services, then finishes. The trades overlap here, and the sequencing is what keeps the programme honest.
6. Handover. Your warranty period starts from handover, not from the day we started.

A focused A&A typically runs six to twelve months of construction; a full reconstruction twelve to eighteen. Add the submission period in front of both. Most owners of an occupied house move out for the structural stage at minimum — living through demolition and piling is possible on a large plot and genuinely unpleasant on a small one, and it is worth deciding early rather than halfway through, because it affects how the programme is arranged.

What Actually Drives the Cost in Seletar Hills

We do not publish a per-square-foot rate for an estate, and you should be wary of anyone who does. The same floor area can differ by a large multiple depending on the five things below — which is exactly why a number quoted before a site visit is a sales tactic, not an estimate.

• The condition of what is already there. A sound structure you are extending is a different project from one that needs its foundations strengthened before it can carry anything new.
• How much you are adding, and where. Building upward loads the existing foundation. Building outward may not, but it eats setback. Building downward is the most expensive direction there is.
• Site access. Where machinery cannot reach, the method changes — and the alternative method is slower and costs more. This is the single most common reason two similar houses quote differently.
• The neighbours. Shoring, underpinning and condition surveys on attached or very close properties are real line items, not paperwork.
• Finishing standard. The one part you fully control, and the one where the range is widest.

What you get from us is a quotation with line items, after a site visit and architect input — so you can see which of the five is driving your number, and decide what to change. If a figure is an allowance rather than a fixed price, we say so at the time rather than at the invoice.

The Same Terms Everywhere We Work

• BCA General Builder Class 2 (GB2), bizSAFE Level 3.
• Seven-year workmanship warranty on a landed home, covering everything we build, and it follows the house if you sell. Painting is five years — Nippon's own limit on the product.
• 5–10% deposit, the rest billed against completed milestones. Stop at any point and pay only for what is done.
• Public liability insurance for the whole project.
• The builder on site. Larry Hoo is the Director and does the work; an Architect and QP handle design and certification.

See how we approach A&A works, real before and after photographs, or the other estates we work in.