Renovating an Old Bungalow in Behala Without Losing Its Character

Behala has a particular kind of house that you stop noticing until someone threatens to knock it down, a single or two storey bungalow set back from the road behind a low compound wall, with a verandah running along the front, tall shuttered windows, a red oxide or mosaic floor that has gone soft and glossy with sixty years of foot traffic, and a courtyard or side setback where the family used to dry papad and now parks a car. These houses were mostly built between the 1950s and the 1980s, often in phases as the family grew, and they carry a level of craft in the joinery and the floor work that nobody is quoting for today at any sensible price.

The reason people come to us about them is almost always the same, the house has started to fail in ways that are getting expensive to ignore, the plaster is blowing off the north wall every monsoon, the wiring is a mix of three generations of work, the toilets are unusable by anyone over seventy, and someone in the family has floated the idea of just demolishing the whole thing and putting up a G+3. That is a real option and sometimes it is the right one, but a lot of the time it is a reflex, and the family later regrets losing a house that had proportions and light that no builder floor is going to give them back.

So this piece is about the middle path, which is the one we take most often, keeping the shell and the character of an old Behala bungalow while quietly replacing everything that has actually worn out. Our studio has been doing this since 2014 out of New Town and across greater Kolkata, and the pattern of what goes wrong in these houses is remarkably consistent, so here is what we actually see on site and how we work through it.

What Character Actually Means in a Behala Bungalow

When a client says they want to keep the character, they usually cannot name what they mean, and that is fine, that is our job to pin down before anything gets demolished. In practice, on these houses, character sits in about six things, and if you protect those six the house survives its own renovation. The first is the verandah depth, because the deep front verandah is what keeps the west sun off the living room and it is also the social device that makes the house feel like a house and not a flat. The second is the window proportion, tall openings with a high head level, which is what makes the rooms feel generous even when they are only ten feet wide. The third is the floor, the red oxide, the terrazzo, the patterned encaustic tile in the front room, and this is the single most irreplaceable thing in the building. The fourth is the joinery, Burma teak frames and shutters that have not moved in decades. The fifth is the ceiling height, usually eleven to twelve feet, which is what makes these houses breathe. The sixth is the courtyard or side open space, which does more for natural ventilation than any air conditioner you will bolt on later.

Everything else, the wiring, the plumbing, the toilets, the kitchen, the false ceilings somebody added in 2006, the aluminium sliding windows that replaced two of the original ones, the mosaic that got tiled over in the back bedroom, all of that is fair game. Once the family sees the list split that way, into six protected things and everything else negotiable, the conversation stops being emotional and starts being a brief.

Start With a Condition Survey, Not a Moodboard

The most common mistake we see is a family that spends three months on Pinterest and zero days on a condition survey, and then discovers in month two of construction that the rear wall has no proper footing. On an old bungalow the sequence has to be inverted, you find out what you actually own before you decide what you want. A proper survey on a Behala bungalow takes us roughly a week to ten days of on and off site work and it covers the measured drawing of the existing building, which almost never matches whatever old blueprint the family has in a steel almirah, plus a structural walkthrough with an engineer, a damp and salt survey of the walls, a check of the roof slab and terrace waterproofing, a services audit of the wiring and plumbing, and a look at the drainage and the plinth level against the road level, because in a lot of Behala the road has been resurfaced so many times that the house now sits lower than the street.

That last one matters more than people expect. If the road outside has risen eight or ten inches over four decades, your plinth is no longer doing its job, water sits against the wall base in the monsoon, and no amount of interior finishing is going to stop the damp from coming back within two seasons. We would rather find that in week one than in year two.

The Structure Question, Repair, Strengthen or Rebuild

Old Behala bungalows come in three broad structural types and the answer is different for each. Some are load bearing brick with timber or joist and tile roofs, some are load bearing brick with a later reinforced concrete slab poured over, and some are proper framed structures from the 1970s onward with columns and beams. The framed ones are usually the easiest to work with because you can take out non structural infill walls and reconfigure the plan freely. The load bearing ones are where the discipline is required, because in a load bearing house every wall you casually remove to open up the kitchen is potentially carrying the slab above, and the fix, a beam and props, is not expensive if it is designed, and is catastrophic if it is improvised by a mason on a Tuesday.

What we assess with the structural consultant is the state of the reinforcement where the slab has spalled, the condition of the lintels over the tall windows, the footing depth at the walls that show diagonal cracking, and whether there has been any historic settlement. Steel corrosion in an old slab is usually a repairable condition, you cut back to sound concrete, treat the bars, apply a bonding agent and a polymer modified repair mortar, and then you fix the reason water was getting there in the first place, which is almost always the terrace. Rebuilding a slab is a decision we take slowly, because once you break a slab in an old house you have opened a much larger project and the cost curve changes shape entirely.

There is a rebuild threshold and we are honest about it with clients. If the footings are inadequate for the load, if there is active differential settlement, if the family needs three separate independent floors with a lift and parking, then keeping the shell is nostalgia with a construction bill attached, and a fresh building designed properly under current building code thinking will serve them better for the next forty years. In that case we move the conversation to residential architecture and design the new house to carry forward the elements the family loved, the verandah depth, the window rhythm, a reused floor pattern in the entrance, so the character travels even when the building does not.

Damp Is the Real Enemy and It Is Almost Always Fixable

If a Behala bungalow has one recurring illness, it is rising and penetrating damp. Rising damp comes up through the wall base because the original damp proofing course has either failed or was never continuous, and it shows up as a tide mark about two to three feet up the wall with salt crystals and blown plaster. Penetrating damp comes sideways through a wall that faces the weather or shares a boundary with a neighbour's building where there is a two inch gap nobody can reach. And then there is the terrace, where the original lime and brick bat coba has cracked, the slope has been lost under three later layers of patching, and the rainwater outlets are choked.

The fix is layered and it has to be done in order. You address the source first, so terrace waterproofing gets stripped back and rebuilt with proper slopes and a functioning outlet, the plinth gets a proper apron and drain so water moves away from the wall, and any neighbour gap gets sealed as best as access allows. Then you inject or otherwise reinstate a damp proof course at the wall base. Then you hack off the salt contaminated plaster generously, usually a good half metre above the visible tide mark, let the wall dry, and replaster with a breathable salt resistant system. What you do not do, and what half the contractors in Kolkata will offer to do, is skim over the damp patch with waterproof putty and paint, which buys you one dry monsoon and then blows off worse than before. We have written more about this cycle in our piece on monsoon proofing a Kolkata home, because it applies to new buildings too.

While the walls are open, this is also the moment to deal with termite activity, and in old Behala houses with original timber joinery and any surviving timber roof members, activity is common. Anti termite treatment at the plinth and around the frames is cheap when the plaster is already off, and painful later.

Services, Kitchens and Bathrooms, Where Old Houses Break Down

Every old bungalow renovation is really a services project wearing a decorating costume. The wiring in a 1965 house was designed for a few lights, a couple of fans and one refrigerator, and today the same house is running four air conditioners, an induction hob, a geyser in every bathroom, a washing machine, and a router that everyone shouts about. We rewire completely, in almost every case, with a fresh distribution board, proper earthing, dedicated circuits for the heavy loads and residual current protection. Doing this partially, keeping the old circuits in the front rooms because they seem fine, is a false economy that leaves you with an untraceable fault in year three.

Plumbing follows the same logic. Old galvanised iron lines choke internally and you can lose most of your flow to scale, so we replace supply lines entirely and rethink the drainage layout rather than inheriting it. The one thing we try hard to avoid is scattering wet areas all over the plan, because every new bathroom position in an old house means a new stack, a new floor cut and a new leak risk. Grouping wet areas vertically and horizontally is the single biggest cost and risk saver in these projects.

The kitchen is usually where the family finally feels the renovation. Old bungalow kitchens sit at the back, are narrow, dark and hot, and have a single small window over a stone counter. Opening that back wall, bringing in light, giving the cook a view out and a proper exhaust path changes daily life in that house more than any front room finish. We handle this as part of residential interior design with the layout driven by movement rather than by catalogue, and where a fitted system makes sense we take it into modular kitchen design with materials chosen for Kolkata humidity, which rules out a fair amount of what gets sold cheaply.

Bathrooms deserve a separate thought because these renovations are very often triggered by ageing parents. A bathroom that an eighty year old can use safely, with a level threshold, a wider door leaf, grab support in the right places and a floor finish that is not lethal when wet, is not an expensive addition if it is designed in from the start, and it is close to impossible to retrofit once the floors are laid. The same goes for accessibility through the house, the step up into the verandah, the height of the plinth from the driveway, the width of the passage to the bedroom.

Approvals, Records and the Paperwork Around a Renovation

This is where families get anxious, and mostly unnecessarily so, because the paperwork depends heavily on what you are actually doing. Internal work that does not change the building's footprint, height or structural system sits in a very different bucket from adding a floor, extending into a setback or changing the use of the building. The moment you touch coverage, height, setback or the sanctioned plan in any material way, you are in a sanction process with the relevant authority for that address, and the drawings, structural certification and documentation have to be prepared properly. Our principal architect Sumana Kumar routinely takes projects through those sanction processes, and the practical advice is always the same, find out what your file actually contains before you design anything.

The catch here is that a lot of old Behala houses have messy records. The sanctioned plan may be missing, the building as it stands may differ from whatever was sanctioned because a room got added in 1988, the mutation and property records may still be in a grandparent's name, and there may be multiple heirs with an interest in the property. None of that stops a renovation, but it can stop a sanction, and it is one of the first things a lender will look at if the family is funding the work with a loan. So the sensible order is, get your title and record position clarified with your own lawyer, get the tax and mutation position confirmed with your CA or the relevant office, and in parallel we prepare the measured drawings and the design so nothing is waiting on anything. We are architects, not lawyers or bankers, and we say this plainly, the legal and financial specifics of your title, mutation, loan eligibility and valuation belong with your own advisors, while what we own is the drawing set, the specifications and the coordination that those advisors and the authority will ask for.

Two guides on our site that carry over almost entirely to renovation work are the one on documents required for building sanction and the one on why building plans get rejected, because the same document gaps and the same drawing errors that sink a new build application will sink a renovation application. If your project touches open space at the sides or rear, the thinking in our setback and open space guide is worth reading for the concept even though the exact numbers vary by plot, zone and revision, and you should confirm the current figures for your own address with the relevant authority rather than taking any number from a blog post as final.

Sequencing So the House Is Never Half Open in Monsoon

Kolkata gives you a construction calendar whether you like it or not. Anything that involves an open roof, exposed walls or fresh waterproofing wants to happen outside the heavy months, and if the programme is not planned around that you will spend money twice. What we do on these projects is front load the wet and structural work, terrace, damp, structural repair and external plaster, into the dry window, and push the dry finishing work, joinery reinstatement, electrical finishing, painting, furniture, into the months when it does not matter that it is pouring outside.

The other sequencing decision is whether the family vacates. On a full bungalow renovation with rewiring and replumbing, staying in the house is usually a mistake, the dust is constant, the water goes off unpredictably and the work slows down because the contractor is negotiating around people. On a phased renovation where you do the ground floor first and then the first floor, staying is workable if there is a clean separation and a functioning bathroom and kitchen on the occupied side. We plan that split explicitly at the drawing stage rather than discovering it on site.

For anyone who wants to see how the finished thing reads before committing, this is exactly where 3D visualisation and rendering earns its cost on a renovation. Modelling the existing shell and showing the family the reworked verandah, the opened kitchen and the reinstated floor in context settles arguments that would otherwise run for weeks, and it is far cheaper to move a wall in a model than after it is built. Our Chinar Park bungalow project is a useful reference point for the kind of house and the kind of decisions we are describing here.

What a Behala Bungalow Renovation Tends to Cost

Numbers first, with the caveat that these are indicative ranges as of writing, they move with material prices and they are not a quote for your house, and the only real number comes from a survey and a bill of quantities on your actual building. Broadly, we see old bungalow work fall into three bands. A light refresh, meaning rewiring, replumbing, bathroom and kitchen replacement, damp repair and repainting with existing floors retained, tends to land in the region of roughly 1,200 to 2,000 rupees per square foot. A deep renovation that adds structural repair, terrace waterproofing rebuild, some layout change, new joinery where the originals are gone and full interior design fit out tends to run roughly 2,200 to 3,500 rupees per square foot. And once you are adding a floor, adding a lift, or effectively reconstructing, you are into new build economics and you should be comparing against the cost of building fresh rather than against a renovation budget.

Fees for design work are a separate line from construction and are usually structured either as a percentage of project cost or as a lump sum against a defined scope, and renovation work often carries a slightly higher percentage than new build because the survey, the coordination and the on site decision making are heavier per square foot. We have set out how this generally works in our note on architect fees in Kolkata. Whatever the structure, insist that the scope is written down, because the disputes on these projects are almost never about the rate, they are about what was assumed to be included.

The Version of the House Worth Aiming For

The best outcome on one of these projects is a house that a visiting relative walks into and says nothing about, because the verandah is still the verandah, the light still falls the way it used to, the old floor is still underfoot in the front room, and they simply do not register that every pipe, wire, waterproofing layer and bathroom in the building is new. That is the standard we work to. The character is not in the decoration, it is in the proportions and the light and the way the house sits on its plot, and if you protect those and modernise everything behind them, you get a building that will comfortably serve another forty years without pretending to be something it is not.

If you have an old bungalow in Behala or anywhere in greater Kolkata and you are trying to work out whether to renovate it or replace it, the useful first step is a condition survey and an honest conversation about what the family actually needs from the house over the next twenty years, and that is where we usually start. You can look through how we approach renovation and remodelling work, and if it feels like a fit, get in touch with us with your address, whatever old drawings you have and a few photographs, and we will tell you plainly whether the house is worth keeping.