Renovating an Older Garden Route Home

Renovating an existing house is harder to price than building a new one, because half the scope is hidden until you open something up. The way to keep it under control is to find the surprises deliberately, early, rather than discover them in month three.

Renovating an Older Garden Route Home — practical guidance from the team running home renovations on the Garden Route. Below is what older Garden Route houses tend to be hiding, how to investigate before you commit, what needs approval, and where the money actually goes on a renovation.

Why renovation is harder to price than a new build

A new build starts from a drawing and known ground. A renovation starts from a building somebody else built, possibly decades ago, possibly altered twice since, with no reliable record of what was done.

Three things make it unpredictable. You cannot see the scope. Wiring inside walls, plumbing under floors, structure behind plaster, the condition of a roof underlay. Until something is opened, everyone is estimating.

Existing work sets the standard you must meet. Touching an old electrical installation can pull the whole board into scope, because a certificate of compliance covers the installation rather than your bit of it. Altering a drainage run can require the rest of it to comply.

Everything is a junction. New work meeting old work — floor levels that do not match, a new opening in an old wall, a modern window in an old reveal, new plaster against a wall with no damp course. Junctions are labour, and labour is the majority of a renovation.

Which is why the honest way to price one is a thorough investigation followed by a scope with named provisional sums, rather than a confident single number that has no chance of surviving the first week.

What older Garden Route houses tend to be hiding

The coastal strip and the older suburbs of George have a recognisable set of findings, and a good pre-renovation survey goes looking for them specifically.

A perished roof underlay. The most common expensive surprise. Bituminous felt has a finite life; it goes brittle, tears at the fixings and disintegrates. The tiles above it can be perfectly sound. You cannot replace it from above, so it means stripping and re-laying the covering — a re-roof, not a repair.

Corroded metal in the roof. Nails, clips, valley linings, flashings and fixings all corrode faster in salt air, and they routinely reach the end of their life while the covering looks fine.

No damp-proof course, or a bridged one. Older houses may have none, or one that has been bridged by paving, a flower bed or plaster carried down across it. That is the cause of most rising damp on older properties, and coating the wall makes it worse.

Old electrical installations. Rubber-insulated cable, no earth leakage, undersized boards, and circuits that have been extended informally over decades.

Galvanised plumbing that has silted up internally, and drainage that has settled or been altered without record.

Undocumented alterations. A room, a carport or an enclosed stoep that never went on a plan. Very common, entirely fixable through an as-built submission, and far cheaper to sort out before a sale than during one.

Asbestos. Roof sheeting, and sometimes ceiling board or eaves soffits, in houses of a certain age. It is safe while intact and undisturbed — and a renovation is precisely the activity that disturbs it. Identify before you demolish, not after.

Finding	How common	Cost impact	Find it by
Perished roof underlay	Very	High — it is a re-roof	Torch in the roof space
Corroded roof fixings and flashings	Very, near the coast	Moderate	Roof inspection
Missing or bridged DPC	Common	Moderate	Damp survey, check external levels
Old electrical installation	Common	Moderate to high	Electrician, CoC assessment
Unapproved past alterations	Common	Low to fix, high if found at sale	Council plan search
Asbestos sheeting	Age-dependent	High if disturbed carelessly	Sampling before demolition

Investigate before you commit

The single best money you will spend on a renovation is spent before any work starts, converting unknowns into known quantities.

Pull the approved plans from the local authority. This tells you what is officially there, and by omission what is not. It is also the moment to discover that the third bedroom was never approved.

Get into the roof space with a torch. Underlay condition, timber condition, whether anything has been cut, water staining, insulation. Fifteen minutes here changes budgets.

Have the electrical installation assessed by an electrician who will tell you what a certificate of compliance would require, not just whether the lights work.

Open up strategically. A few small, deliberate openings in the right places — a section of ceiling, a floor board, a patch of plaster on the wall you intend to remove — tell you more than any amount of speculation. Do it while you still have the option of walking away.

Test for asbestos before demolishing anything in a house of the relevant age.

Check the drainage runs and falls if you intend to move a bathroom or kitchen. Moving a soil connection is one of the largest hidden costs in a renovation.

Then price the work with named provisional sums for what remains genuinely unknown, so both sides can see where the uncertainty sits rather than burying it in a lump.

What needs approval, and what triggers compliance

Renovations sit in a grey area that owners frequently misjudge in their own favour.

Needs approved plans: any addition or extension; anything structural, including removing or altering a load-bearing wall or forming a new opening; a change of use; converting a garage to habitable space; enclosing a stoep; a new carport or covered patio in most cases.

Generally does not: internal finishes, replacing like with like, non-structural partitions, and genuinely minor work — with “minor” defined by the local authority rather than by you.

Compliance triggers are the part that surprises people. Touching the electrical installation can bring the whole installation into scope for a certificate of compliance. Altering drainage can require the affected system to comply with current requirements. Adding habitable area can pull the building into SANS 10400-XA energy compliance. None of these are unreasonable; all of them belong in the budget rather than in a variation.

Estates and heritage. Estate architectural committees have their own approval process, separate from the municipality’s. And older properties can carry heritage provisions — in South Africa, structures older than sixty years attract additional protection, which affects what you may alter and how. It is worth establishing that at the start rather than after the demolition.

Where the money actually goes

Renovation budgets are consistently misallocated by owners, because the visible items feel like the expensive ones and they are not.

Services are the biggest single driver. Moving a kitchen or a bathroom means drainage, water, and electrical, and drainage is the one that decides. A layout that keeps wet areas where they already are costs a fraction of one that relocates them. If you are working to a budget, this is the largest single lever available to you.

Structure is expensive but usually contained. Removing a load-bearing wall means a beam, temporary support and an engineer. It is a real cost and it is usually a known one once the engineer has looked.

Making good is the item nobody budgets. Every alteration leaves edges: plaster to patch, floors to match, skirtings, cornices, paint that will not match the existing wall so the whole room gets painted. On a renovation this can be a startling proportion of the total, and it is the reason renovation costs more per square metre than new build.

Access and protection. Working in an occupied or furnished house is slower and needs protection, dust control and daily clean-down. Empty houses renovate faster and cheaper.

Compliance and professional fees — plans, engineer, certificates. Modest against the whole, and not optional.

Contingency. On a renovation this is not padding; it is a line item with a job to do. A renovation budget with no contingency turns every normal discovery into a crisis.

Getting it built without living in a building site

The practical side matters more on renovation than on new build, because you are usually still in the house.

Decide whether to move out. It costs money and it usually saves more — the work runs faster, the trades are not tiptoeing around your furniture, and nobody is trying to make a kitchen work behind plastic sheeting. On a substantial renovation, moving out for the noisy phase is frequently the cheaper option overall.

Sequence for weathertight first. If the roof is coming off or an opening is being formed, get the building closed again before anything internal starts. Garden Route rain does not wait for a convenient phase.

Zone the work. Where you are staying put, closing off completed areas and working in defined zones keeps the dust and the disruption bounded.

Make selections before work starts. Every finish and fitting, chosen, with a decision date schedule. Late decisions convert directly into standing time, and standing time on a renovation is worse than on a new build because there is nowhere else on site for the trade to go.

Order long-lead items at the start — windows, cupboards, stone tops, specialist tiles. Storage is cheaper than a stalled programme.

And write the variations down. Renovations generate more variations than new builds by their nature. Priced in writing, with the programme effect, before the work happens. That single discipline is the difference between a renovation that lands near its budget and one that does not.

Frequently asked questions

Is it cheaper to renovate or rebuild?

It depends on how much of the existing building you actually keep. Renovation wins where the structure, roof and services are sound and you are changing layout and finishes. Rebuilding starts to win when the roof needs replacing, the electrical installation needs redoing, the drainage is failing and the layout is wrong anyway — at that point you are paying renovation prices for a building that still carries its original constraints. The investigation stage is what tells you which side of that line you are on.

Do I need plans to renovate a house?

For anything structural, any addition or extension, any change of use, enclosing a stoep, converting a garage, or forming a new opening in a load-bearing wall — yes. Internal finishes and like-for-like replacement generally do not. The grey area in the middle is defined by your local authority rather than by you, so it is worth a phone call. Building first and asking later is how work ends up being regularised during a sale.

What are the most common surprises in an old house?

A perished roof underlay is the most common expensive one, and on the coast it is usually accompanied by corroded fixings and flashings. After that: no damp-proof course or a bridged one, an electrical installation that will not certify, galvanised plumbing that has silted up, drainage that has been altered without record, and past alterations that were never approved. In houses of a certain age, asbestos sheeting — safe while undisturbed, which is exactly what a renovation does not do.

How much should I budget for contingency on a renovation?

More than on a new build, because more of the scope is hidden. The useful way to think about it is not a percentage but a list: what specifically might we find, and what would each one cost? A thorough investigation before starting converts most of that list into known quantities, and the contingency then covers what genuinely could not be seen. A renovation budget with no contingency turns every normal discovery into a crisis.

Can I live in the house during a renovation?

For contained work, yes, with zoning and dust control. For substantial work it usually costs you more than moving out saves — the job runs slower, the trades work around you, and daily protection and clean-down is real labour. On a big renovation, moving out for the noisy phase is often the cheaper option overall as well as the more bearable one.

What makes a renovation expensive?

Moving services, above everything else. Relocating a kitchen or a bathroom means drainage, water and electrical, and drainage is the one that decides — keeping wet areas where they already are costs a fraction of moving them. After that: making good, which nobody budgets for and which is a large share of the cost; working in an occupied house; and late decisions, which convert directly into standing time.

Do I need an electrical certificate of compliance for renovation work?

If the installation is altered, yes, and this catches people out: a CoC covers the installation as a whole rather than only your new circuit. So touching an old board can pull the existing wiring into scope. It is far better to have an electrician assess that up front and put a number on it than to discover it once the walls are open.

Renovating an older place?

We will walk it with you before anyone prices anything — roof space, board, damp, drainage, and the council plans — so the surprises are on the scope sheet instead of arriving in month three.

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