Altering a DDA Flat in 2026: What You Can Do Without Permission, What Needs DDA or MCD Approval, and the New Rights for Upper Floors

The Delhi Development Authority has revised its policy on additions and alterations in DDA flats, and the revised policy came into effect on 1 July 2026, the first revision since 2007, as Business Today reported on 18 July. The revised policy sorts work into three categories: minor work that needs no intimation or permission at all, larger work that needs intimation or permission from the DDA or the MCD, and additional covered area, which needs prior permission. It applies to 'all flats built and allotted by DDA irrespective of whether these are located in notified and de-notified areas', and its provisions apply in full to buildings of up to ground plus four storeys. The changes that matter most to an owner: upper-floor owners in two, three and four storey blocks may now build on the terrace created when the flat below covers its courtyard, a common staircase can be extended to the roof, solar panels have a route, and single-storey and duplex flats can be demolished and rebuilt with permission. This guide sets out each category, the papers an application needs, how long approval takes, and what to check before any wall comes down.

What Changed in July 2026?

Compare the revised text with the earlier policy document that is still on the DDA's site. The old policy said that in two-storey flats 'the allottee at first floor will have no right of construction above the courtyard built by ground floor allottee'; the revised policy gives owners at upper floors in 'two, three or four storied flats' the right to build on the courtyard cover or resultant terrace of the floor below. The old policy allowed a barsati on the roof terrace of the top floor; the revised policy does not list one, and its governing rules say the roof terrace 'shall remain common to all the residents/owners of the block and cannot be used by any particular resident/owner or group of residents/owners for their exclusive use'. Under the old policy, plans submitted with the architect's and engineer's certificates and the fee were 'taken on record and treated as permitted'; now the sanctioning authority may grant, refuse or modify the proposal and must communicate its decision within 30 days. A structural engineer must certify the safety of the existing structure for the proposal, and older buildings need a structural audit for the larger works. The old fee, ₹200 for processing plus ₹450 per sqm of additional covered area, has been replaced by 'as notified from time to time'.

What Can You Do Without Any Permission?

Category I lists sixteen jobs that 'can be carried out by the owner(s) without any intimation/permission of DDA/MCD', on the condition that they need no structural change. They are: grills and glazing in the verandah; raising the front and rear courtyard wall to 7 feet with a jali or fencing; a door in the front or rear courtyard, or moving one, without blocking common circulation; a sunshade up to 2 feet 6 inches wide over doors and windows on walls facing the block's courtyard; closing a door; raising a balcony or terrace parapet to 5 feet with grill or glazing; an additional PVC water tank at ground level; a PVC tank on the slab of your own scooter or car garage, if the structure can take it; a loft, 'ensuring structural safety'; new flooring, 'with the provision of water proofing treatment in wet areas'; removing a 'half (4½) brick wall'; a ramp at the front gate; an opening for an exhaust fan or a window AC; turning a window into a cupboard, provided light and ventilation still meet the building bye-laws and no structural element is disturbed; shifting the water tank or raising the terrace parapet to 5 feet; and an EV charging point in the designated parking, following the Ministry of Power's EV guidelines.

Two of these carry conditions worth reading twice. The water tank item allows a flat with less than 500 litres of storage to go to 500 litres, or to add a tank for a total of up to 550 litres, only 'on the locations specified for such tanks', on supporting beams that carry the load to columns or load-bearing walls, 'with no direct load to be put on slab'. And only the half-brick wall, about 4½ inches thick, is on the list. A 9-inch wall may be carrying the floors above, and removing or cutting it is structural work outside Category I.

What Needs Intimation or Permission?

Category II has six items, applied for through the DDA or the MCD. Covering an open terrace shown on the DDA's approved drawing with a sloping roof, as a temporary structure in lightweight roofing up to the floor level of the flat above, enclosed with glazing, needs intimation alone: 'Only Intimation is sufficient', the policy says. The other five need permission. A sunshade up to 2 feet wide over doors and windows on external walls facing internal streets or lanes. Swapping the positions of the kitchen, bathroom and WC, with the plumbing connected directly to the existing vertical stack, IGL's permission where a PNG line exists, and a no-objection certificate from every owner in the vertical block. Extending a common staircase that stops short of the roof up to the terrace, with a mumty, where structural safety and fire safety are ensured, every resident keeps access, and AAI clearance is taken in the airport funnel zone; either the RWA or at least 75% of the block's owners must apply. Demolishing and rebuilding a single-storey or duplex flat in single-tenement use, with no change in coverage, FAR, height, basement, number of floors, dwelling units or building line, and with the adjoining structures kept safe. And rooftop solar panels for domestic use, under the bye-laws and the MNRE's guidelines, again applied for by the RWA or at least 75% of the block's owners.

Can You Build Over the Courtyard or the Terrace Below?

Yes, with prior permission; this is Category III. A ground-floor owner may cover the courtyard 'upto floor level of first floor as permanent structure'. In two, three and four storey flats, owners on the upper floors may then build on 'the area available as a result of coverage of courtyard/resultant terrace of floor below as permanent structure'. And a bathroom and WC may be built in the rear courtyard, with the plumbing connected to the existing drainage, sewage and water supply. All three must leave common circulation and services clear and keep to the DDA's approved layout plan for the pocket. Because the floors stack, the policy makes the vertical block apply together: for covering the courtyard or building on the resultant terraces, and for swapping wet areas and extending the staircase, 'all the owner(s) of one vertical block will jointly submit the proposal', and owners who do not want to build give a no-objection certificate.

Does the Policy Apply to Your Flat?

Three checks. First, height: the policy's note says all its provisions apply to structures of up to ground plus four storeys, and in DDA multi-storey housing only five Category I items are allowed (raising the balcony parapet, a loft, new flooring, removing a half-brick wall and an EV charging point) plus solar panels from Category II. Second, the authority: additions and alterations in the DDA's development areas are permitted by the DDA, and 'in other areas by concerned MCD', so find out which applies to your pocket before the architect starts. Third, ownership: a lease deed or conveyance deed is accepted as proof, and a registered sale deed, general power of attorney or agreement to sell is accepted 'only after the property has been converted into freehold by DDA'. If your flat is still leasehold on a power-of-attorney chain, convert it first.

What Papers and Certificates Does an Application Need?

The application goes online, signed by the owners and an architect registered with the Council of Architecture. The architect certifies that the proposal is correct against the original DDA-approved plans and conforms to the bye-laws and the policy, and a structural engineer certifies 'the structural safety and stability of the existing structure w.r.t. proposal'. Drawings show the original construction in blue and the proposed work in red, at a scale of at least 1:100. The architect obtains the approved plan of the flat from the DDA's Housing and Urban Projects Wing; where it is not available, the architect prepares a measured drawing of the entire vertical block served by the staircase, which the sanctioning authority inspects and certifies first. The forms list four sets of plans, a service plan where a toilet is added or moved, ownership documents, an indemnity bond on ₹100 non-judicial stamp paper from each owner in the vertical block indemnifying the DDA against structural failure (owners who only give a no-objection certificate are exempt), a structural stability certificate, a certificate for safety from natural hazards signed by the owner, architect and structural engineer, and supervision certificates from the architect and engineer with their registration and qualification papers.

For buildings constructed before 21 March 2001, the larger works need a structural audit first. The policy requires one for swapping wet areas, extending the staircase, rebuilding a single-storey or duplex flat, and everything in Category III, 'to be got done by the allottee/allottees/owners of the concerned block' under the Delhi government's action plan for making buildings seismically compliant. Our structural audit guide explains what a proper audit tests and what its report leads to.

How Long Does Approval Take, and What Does It Cost?

The sanctioning authority must communicate its decision within 30 days of receiving the application; if it raises shortcomings, the 30 days run from your last reply. After the work, the owner intimates completion through the architect, who certifies that the construction follows the proposal. That intimation must be given within 3 years of submitting the plans, or 'the permission granted will automatically get revoked and withdrawn'. The authority may test-check any proposal or completion, and if it finds non-conformity it revokes the permission and acts 'against the owner/architect/structural engineer' under the Delhi Development Act or the DMC Act. On fees, the revised policy says only that the building plan fee and additional floor area charges are 'as notified from time to time'. We have not found a schedule under the revised policy, so ask the sanctioning authority for the current figures for your flat before you apply.

Can Work Already Done Be Regularised?

Yes, if it is within the policy. The existing additional covered area and alterations 'can also be get regularized by the owner(s) of DDA flats if the same are within the prescribed norms following the same procedure', and where construction is complete and only regularisation is needed, the authority issues a regularisation certificate. Work outside the three categories, such as a room built on the common roof terrace, has no route under this policy, and our guide to MCD notices for unauthorised construction explains what follows when a notice arrives.

What Should You Check Before the Work Starts?

Five things. Get the original approved plan, or the certified measured drawing, before any design, because every certificate is measured against it. Have the structural engineer look at the walls you want to move: whether a wall carries load decides whether the job is Category I or not. For a kitchen or bathroom move, plan the drain fall to the existing vertical stack and full waterproofing of the new wet area, because any water that escapes it ends up in the ceiling of the flat below; our guide to bathroom leakage from the floor above shows how it happens. Agree the no-objection certificates with your neighbours in the vertical block before the architect files. And for building on a resultant terrace, check the light and ventilation of the rooms below, which the policy's governing rules protect under the bye-laws.

Nirman Ved carries out the civil work in DDA flats once the permission is in place, or straight away for Category I work: loft and flooring, kitchen and bathroom relocation with waterproofing, and room additions over a courtyard or terrace with your architect and structural engineer. Our published renovation rates run from ₹800 to ₹3,000 per sqft, and a standard bathroom renovation at ₹1,500 per sqft works out to ₹60,000 to ₹75,000 for a 40 to 50 sqft bathroom, as our bathroom and kitchen renovation cost guide sets out; new covered area is quoted after the free site visit. We are trusted by DAV Pitampura and DPS Dwarka for campus civil repairs and maintenance. To plan the work on your flat, call +91-7838355055 or book a free site visit.