Old houses have something new apartments rarely do. Character. History. Solid construction from an era when builders weren’t cutting corners.
But they also come with real problems. Outdated wiring. Damaged plaster. Old plumbing that leaks behind walls. Layouts that made sense decades ago but don’t work for modern life.
Designing an old house isn’t the same as designing a new flat. The process starts differently. The priorities are different. And the surprises are bigger.
This guide tells you what to expect and how to approach it properly.
Start With a Structural Assessment
Before any design decision, understand what you’re actually working with.
Old houses in Bangladesh — especially those built before the 1990s — may have aging concrete, corroded reinforcement bars, or settled foundations. Some have walls that were modified without engineering approval.
Hire a structural engineer before anything else. Not a contractor. Not an architect. A structural engineer who can assess the slab, columns, beams, and foundation.
This assessment costs very little relative to the renovation budget. It tells you what can be changed and what cannot be touched.
Fix the Invisible Problems First
This is the rule most homeowners resist. They want to see results fast. They want paint and new tiles. But old houses hide serious problems inside walls and under floors.
Electrical Rewiring
Most old houses in Bangladesh have outdated wiring. Aluminum wiring, undersized cables, no earthing, overloaded circuits. This is a fire and safety risk.
Rewire completely. Don’t patch. Old wiring that gets patched fails at the unpatchable section two years later. Do it once, do it properly. Pull new copper cables through new conduit to every room.
Plumbing Inspection and Replacement
Old galvanized pipes corrode from the inside. Water flow reduces over time. Pipes fail without warning behind finished walls.
Inspect all supply and drainage lines. Replace anything showing corrosion or age. Do this before any tiling or plastering begins. Plumbing failures after finishing cost triple to fix.
Waterproofing and Damp Treatment
Old houses often have damp problems. Rising damp from the ground floor. Seepage through old terrace slabs. Bathroom leaks that have been spreading through the structure for years.
Identify every damp area. Treat it properly with the right waterproofing system before covering anything. Painting over damp walls without treating the source just delays the problem by a few months.
What to Demolish and What to Keep
This decision defines the entire project.
Worth Keeping
- Original solid brick walls — stronger than modern alternatives in many cases
- High ceilings — an asset that new apartments rarely offer
- Solid timber doors and windows — restore rather than replace where possible
- Original mosaic or terrazzo floors — these are making a design comeback and can look stunning after restoration
Worth Replacing
- Old asbestos roofing sheets — health hazard, must be removed by professionals
- Crumbling plaster — re-plaster completely rather than patching
- Old bathroom fittings and sanitary ware — replace fully
- Aluminum or single-glazed windows in noise-affected areas — upgrade to better sealing
Layout Changes in Old Houses
Old house layouts often don’t suit modern living. Rooms are separated by walls everywhere. Kitchens are isolated at the back. Bathrooms are tiny and dark.
Opening Up the Kitchen
In old Bangladesh houses, the kitchen was designed to be hidden. Modern living prefers connection — a kitchen that opens toward the dining area.
Removing the kitchen wall is often possible if it’s non-structural. This single change transforms how the house feels. The kitchen becomes part of the home instead of a separate working area.
Combining Small Rooms
Two small adjacent rooms can sometimes become one larger, more functional room. A cramped bedroom and a storage room can become one proper bedroom. Two tiny bathrooms can become one well-designed bathroom.
Always verify with the structural engineer before removing any wall.
Adding Bathrooms
Old houses often have too few bathrooms for the number of rooms. Adding a bathroom in an old house is possible but requires careful planning of new drainage routes. Budget for this properly — drainage in an old structure is more complex than in a new build.
Room-by-Room Design Guide for Old Houses
Living Room
Old houses often have their best asset here — high ceilings and large windows. Design around these strengths.
Keep the ceiling height. Don’t drop it with false ceiling unless there’s a specific reason. High ceilings with exposed beams or a clean painted finish look better than a lowered false ceiling that reduces what makes the room special.
Restore the original floor if it’s mosaic or terrazzo. Polish it. These floors are durable, cool underfoot, and look genuinely beautiful when restored. Replacing them with standard tiles loses the character permanently.
Furniture should be scaled to the room size. High ceilings need taller furniture. Low-slung modern sofas can look lost in a room with 12-foot ceilings.
Kitchen
Old house kitchens need complete rebuilding in most cases. Old plumbing, outdated layout, insufficient ventilation.
Start fresh. New cabinet layout, new plumbing connections, new electrical points for modern appliances. A kitchen renovation in an old house is not a cosmetic job. It’s a structural and functional rebuild.
Budget more here than you would for a new flat kitchen. Hidden surprises — old pipes, embedded conduits, uneven floors — add cost and time.
Bedrooms
Old bedrooms often have good proportions but outdated finishes. Crumbling plaster, old paint, inadequate electrical points.
Re-plaster where needed. New electrical points on every wall. New wardrobe — built-in, floor to ceiling. New flooring if original is damaged beyond restoration.
Windows are important in old bedrooms. Restore or replace them for better sealing. Good windows reduce heat, noise, and dust — all significant issues in older Bangladesh neighborhoods.
Bathrooms
Old house bathrooms almost always need complete rebuilding. Replace everything — tiles, fittings, sanitary ware, waterproofing, plumbing connections.
One thing to watch in old house bathroom renovations: floor levels. Old bathrooms sometimes have raised floors for drainage that no longer makes sense with modern plumbing. A good plumber can redesign the drainage to allow a level floor.
Preserving Character While Modernising
This is the balance old house renovation is really about.
The original details are worth protecting where possible. Old brick that can be exposed and sealed. Original timber roof structure that can become a design feature. Terrazzo floors that just need polishing. Arched doorways that speak to the house’s history.
Modern interiors can coexist with these original elements. A contemporary kitchen inside a room with exposed brick walls. A minimalist bathroom with original mosaic floor tiles. Clean modern furniture in a room with high original ceilings.
The homes that feel most special after renovation are the ones that kept the soul of the original structure and updated everything around it.
Budget Realities for Old House Renovation
Old house renovation almost always costs more than expected. Budget accordingly.
For a full renovation of a 1500 sq ft old house in Bangladesh, realistic ranges:
- Basic renovation — ৳25 lakh to ৳40 lakh. Functional updates, standard materials, no major structural work.
- Mid-range renovation — ৳45 lakh to ৳70 lakh. Full rewiring, replumbing, new kitchen and bathrooms, quality finishes throughout.
- Premium renovation — ৳75 lakh and above. Custom everything, imported materials, structural modifications, smart home integration.
Add 20% contingency for an old house project. Not 10%. Old houses reveal surprises during demolition that new construction doesn’t. The 20% buffer is not pessimism. It’s experience.
Frequently Asked Questions
Is it worth renovating an old house or should I rebuild?
Depends on the structural condition and the land value. If the structure is sound, renovation preserves character and costs less than rebuilding. If the structure is compromised — cracked columns, failing foundation, severe corrosion — rebuilding may be the safer and more economical long-term choice. Get the structural engineer’s assessment before deciding.
How long does an old house renovation take in Bangladesh?
A full renovation typically takes 4 to 8 months. Projects with significant structural work or imported materials take longer. Budget more time than you think you need. Old houses always have surprises that slow the schedule.
Can I live in the house during renovation?
For partial renovations, sometimes. For full renovations involving electrical rewiring, replumbing, and plastering — it’s genuinely difficult. Dust, noise, and safety risks make it uncomfortable and sometimes unsafe. Plan alternative accommodation for at least the first two to three months of a full renovation.
What should I prioritize in a limited old house renovation budget?
In this order: electrical rewiring, plumbing inspection and replacement, waterproofing and damp treatment, kitchen, bathrooms. These are the things that protect health and safety and prevent future expensive damage. Aesthetic upgrades come after these fundamentals are addressed.
How do I find contractors experienced with old house renovation in Bangladesh?
Ask for references from completed old house projects specifically. Old house renovation requires different skills than new construction. Contractors who haven’t worked on old buildings often underestimate complexity and underprice work. Visit at least one completed old house project before hiring anyone.
Final Words
Old houses reward patience and careful planning. Rush the process and the problems you missed will surface within a year. Take the time to understand the structure, fix what’s hidden, and preserve what’s worth keeping.
Done right, an old house renovation produces something no new apartment can replicate. A home with genuine character, solid bones, and a story worth living inside.
